Juniper JN0-636 Security, Professional (JNCIP-SEC) Exam Practice Test

According to the Juniper documentation, filter-based forwarding (FBF) is a technique that allows the SRX Series device to forward packets based on firewall filter rules, rather than the default routing table1. FBF can be used to implement policy-based routing, load balancing, or traffic engineering2. To deploy FBF on the SRX Series device for incoming traffic sourced from the 10.10.100.0/24 network, the following steps are required:

• You must create a forwarding-type routing instance. A forwarding-type routing instance is a special type of routing instance that is used for FBF. It does not have any interfaces or routing protocols associated with it, but it has its own routing table that can be populated by static routes, RIB groups, or routing policies3. You can create a forwarding-type routing instance by using the following command:

set routing-instances instance-type forwarding

• You must create and apply a firewall filter that matches on the source address 10.10.100.0/24 and then sends this traffic to your routing instance. A firewall filter is a set of rules that can match on various packet attributes, such as source and destination addresses, ports, protocols, and so on. You can use the then routing-instance action to specify the routing instance that the packet should be forwarded to4. You can create and apply a firewall filter by using the following commands:

set firewall family inet filter term from source-address 10.10.100.0/24 set firewall family inet filter term then routing-instance  set interfaces unit family inet filter input

• You must create a RIB group that adds interface routes to your routing instance. A RIB group is a mechanism that allows you to import routes from one routing table to another. You can use a RIB group to add the interface routes of the ingress interface to the routing table of the forwarding-type routing instance. This will ensure that the SRX device can forward the packets to the correct next hop based on the destination address5. You can create a RIB group by using the following commands:

set routing-options rib-groups import-rib inet.0 set routing-options rib-groups import-rib .inet.0 set routing-instances routing-options instance-import

The following steps are not required or incorrect:

• You do not need to create a VRF-type routing instance. A VRF-type routing instance is a type of routing instance that is used for virtual routing and forwarding. It allows you to create multiple logical routers on the same physical device, each with its own interfaces, routing protocols, and routing tables. VRF-type routing instances are typically used for VPNs, MPLS, or network segmentation. However, they are not necessary for FBF, which can be achieved with a forwarding-type routing instance.
• You do not need to create and apply a firewall filter that matches on the destination address 10.10.100.0/24 and then sends this traffic to your routing instance. This would be redundant and unnecessary, as the destination address of the incoming traffic is already determined by the routing table of the forwarding-type routing instance. Moreover, this would create a loop, as the traffic would be sent back to the same routing instance that it came from.

References: 1: Filter-Based Forwarding Overview 2: Configuring Filter-Based Forwarding 3: forwarding (Routing Instances) 4: routing-instance (Firewall Filter Action) 5: Configuring RIB Groups : [vrf (Routing Instances)]

The following statements are true regarding tenant systems on SRX Series devices:

• Each tenant system runs its own instance of the routing protocol process. Each tenant system is isolated, and it has its own routing table, interfaces, and security policies.
• A maximum of 500 tenant systems can be configured on a physical SRX device. This allows for a high degree of flexibility and scalability, as each tenant system can be configured with its own set of features and security policies.

A maximum of 32 tenant systems can be configured on a physical SRX device and All tenant systems share a single routing protocol process are not correct statements

A logical system is a virtualization feature in SRX Series devices that allows you to create multiple, isolated virtual routers within a single physical device. Each logical system has its own routing table, firewall policies, and interfaces, and it can be managed and configured independently of the other logical systems. Logical systems are an effective way to isolate different administrative domains and to support a large number of virtualized instances.

According to the Juniper documentation, the solution that would best meet the requirements of deploying a virtualization solution with the security devices in the network is logical systems. Logical systems are a feature that allows the SRX Series device to be partitioned into multiple logical devices, each with its own discrete administrative domain, routing table, firewall policies, VPNs, and interfaces1. Each logical system can support up to 100 virtualized instances, depending on the SRX Series model and the available resources2.

The following solutions are not suitable or incorrect for this scenario:

• VRF instances: VRF instances are a type of routing instance that allows the SRX Series device to maintain multiple routing tables for different VPNs or customers. However, VRF instances do not provide separate administrative domains, firewall policies, or interfaces for each instance3.
• Virtual router instances: Virtual router instances are a type of routing instance that allows the SRX Series device to create multiple logical routers, each with its own routing table and interfaces. However, virtual router instances do not provide separate administrative domains or firewall policies for each instance.
• Tenant systems: Tenant systems are a feature that allows the SRX Series device to create multiple logical devices, each with its own discrete administrative domain, routing table, firewall policies, VPNs, and interfaces. However, tenant systems are only supported on the SRX1500, SRX4100, and SRX4200 devices, and each tenant system can only support up to 10 virtualized instances.

References: 1: Understanding Logical Systems 2: SRX Series Logical Systems Feature Guide 3: vrf (Routing Instances) : [virtual-router (Routing Instances)] : [Understanding Tenant Systems]

• The SRX Series device is performing both source and destination NAT on this session because the traceoptions output shows that both source and destination IP addresses and ports are translated. The source IP address 192.168.5.2 is translated to 192.168.100.1 and the destination IP address 1.1.1.1 is translated to 192.168.5.1. The source port 0 is translated to 14777 and the destination port 80 is translated to 80. The traceoptions output also shows the rule and pool IDs for both source and destination NAT: 2/32770 and 1/1 respectively.
• This is the first packet in the session because the traceoptions output shows the flag flow_first_packet, which indicates that this is the first packet of a new session. The traceoptions output also shows the flag flow_first_src_xlate and flow_first_rule_dst_xlate, which indicate that this is the first time that source and destination NAT are applied to this session.

References:

• traceoptions (Security NAT) | Junos OS | Juniper Networks
• [SRX] How to interpret Flow TraceOptions output for NAT troubleshooting

• The source address is translated because the traceoptions output shows that the source IP address 192.168.5.2 is translated to 192.168.100.1 and the source port 0 is translated to 14777. The traceoptions output also shows the flag flow_first_src_xlate, which indicates that this is the first time that source NAT is applied to this session.
• The packet is an SSH packet because the traceoptions output shows that the application protocol is tcp/22, which is the default port for SSH. The traceoptions output also shows the flag flow_tcp_syn, which indicates that this is the first packet of a TCP connection.

References:

• traceoptions (Security NAT) | Junos OS | Juniper Networks
• [SRX] How to interpret Flow TraceOptions output for NAT troubleshooting

The output shown in the exhibit is from the command “show security flow session family inet6”. This command displays the IPv6 flow sessions on the SRX Series device. The output shows that there are two total sessions, both of which are valid. This means that the SRX Series device is configured with flow-based IPv6 forwarding options. Flow-based IPv6 forwarding options enable the device to process IPv6 packets using the security policies, NAT, and other security features. To configure flow-based IPv6 forwarding options, use the command set security forwarding-options family inet6 mode flow-based and reboot the device. References:

• show security flow session family inet6
• Configuring Flow-Based IPv6 Forwarding Options
• SRX Getting Started - Configure IPv6

https://www.juniper.net/documentation/en_US/release-independent/jatp/topics/task/configuration/jatp-traffic-collectorsetting-ssh-honeypot-detection.html

According to the security flow trace shown in the exhibit, which is a snippet of a packet capture on an SRX Series device, the two statements that are correct are:

• This packet arrived on interface ge-0/0/4.0. This is indicated by the line In: 10.0.1.129/22 -> 10.0.1.129/3382;1,0x0, which shows that the ingress interface of the packet is ge-0/0/4.0, as the interface name is prefixed to the source and destination IP addresses and ports of the packet1.
• An existing session is found in the table. This is indicated by the line Found: session id 0x12. sess tok 28685, which shows that the packet matches an existing session in the session table with the session ID 0x12 and the session token 286852.

The following statements are incorrect or not supported by the output:

• Destination NAT occurs. This is not supported by the output, as there is no indication of destination NAT being applied to the packet. The destination IP address of the packet is 10.0.1.129, which is the same as the destination IP address of the original packet. If destination NAT was applied, the destination IP address of the packet would be different from the destination IP address of the original packet.
• The capture is a packet from the source address 172.20.101.10 destined to 10.0.1.129. This is false, as the output shows that the source address of the packet is 10.0.1.129, not 172.20.101.10. The source IP address of the packet is prefixed to the ingress interface name ge-0/0/4.0.

References: 1: Understanding Security Flow Trace 2: show security flow session - Technical Documentation - Support - Juniper Networks

https://kb.juniper.net/InfoCenter/index?page=content &id=KB30443&cat=SRX_SERIES&actp=LIST

According to the Juniper documentation, the local identity for an IPsec VPN tunnel must match the remote identity of the peer device. The local identity can be configured as an IP address, a hostname, a distinguished name, or an advpn identifier. The advpn identifier is used for dynamic VPNs that support multiple remote endpoints. In the exhibit, the corporate device has the local identity configured as inet advpn, which means it expects the branch1 device to have the same remote identity. However, the branch1 device has the local identity configured as inet, which does not match the corporate device’s remote identity. Therefore, the IKE negotiation fails and the IPsec tunnel is not established. To solve this problem, the local identity on the branch1 device should be changed to inet advpn, so that it matches the corporate device’s remote identity. References: [Configuring an IKE Gateway] 1, [Configuring Local and Remote Identities] 2

1: https://www.juniper.net/documentation/us/en/software/junos/vpn-ipsec/topics/task/configuration/security-ike-gateway-configuring.html  2: https://www.juniper.net/documentation/us/en/software/junos/vpn-ipsec/topics/topic-map/security-ipsec-vpn-identities.html

Juniper ATP Cloud is a cloud-based service that provides advanced threat prevention and detection for SRX Series devices. To enroll an SRX Series device with Juniper ATP Cloud, you need to have a valid license and authorization code, and you need to run a Junos OS op script on the device. The op script performs the following tasks:

• Downloads and installs certificate authority (CA) licenses onto your SRX Series device.
• Creates local certificates and enrolls them with the cloud server.
• Performs basic Juniper ATP Cloud configuration on the SRX Series device.
• Establishes a secure connection to the cloud server.

You can run the op script either by copying the CLI command from the Juniper ATP Cloud Web Portal and running it on the device, or by using the enroll command on the device. The op script is the only way to enroll an SRX Series device with Juniper ATP Cloud. You cannot enroll the device manually or by using other methods.

The other statements in the question are incorrect for the following reasons:

• If a device is already enrolled in a realm and you enroll it in a new realm, none of the device data or configuration information is propagated to the new realm. This includes history, infected hosts feeds, logging, API tokens, and administrator accounts. You can view and change the realm association of a device from the Realm Management page in the Juniper ATP Cloud Web Portal.
• The only way to enroll an SRX Series device is not to interact with the Juniper ATP Cloud Web Portal. You can also use the enroll command on the device, which performs all the necessary enrollment steps without requiring you to access the Web Portal.
• When the license expires, the SRX Series device is not disenrolled from Juniper ATP Cloud without a grace period. The device enters a grace period of 30 days, during which it can still send files to the cloud for inspection and receive threat intelligence feeds. After the grace period, the device is disenrolled and stops communicating with the cloud.

References:

• How to Enroll Your SRX Series Firewalls in Juniper Advanced Threat Prevention (ATP) Cloud Using Policy Enforcer
• Enroll an SRX Series Firewall using Juniper ATP Cloud Web Portal
• ATP Cloud | Step 2: Up and Running
• Enroll an SRX Series Firewall Using the CLI

https://forums.juniper.net/t5/Ethernet-Switching/monitor-traffic- interface/td-p/462528

To enforce IDP policies on HTTP traffic on an SRX Series device, the following actions must be performed:

• Choose an attacks type in the predefined-attacks-group HTTP-All: This allows the SRX Series device to match on specific types of attacks that can occur within HTTP traffic. For example, it can match on SQL injection or cross-site scripting (XSS) attacks.
• Match on application junos-http: This allows the SRX Series device to match on HTTP traffic specifically, as opposed to other types of traffic. It is necessary to properly identify the traffic that needs to be protected.

Disabling screen options on the Untrust zone and specifying an action of None are not necessary to enforce IDP policies on HTTP traffic. The first one is a feature used to prevent certain types of attacks, the second one is used to take no action in case of a match.

Proxy ARP is a technique used by routers to answer ARP requests on one network segment on behalf of hosts on another network segment. This is useful in situations where a host on one network segment needs to communicate with a host on another network segment, but the two hosts are not directly connected. In this case, the router acts as a proxy, answering ARP requests on behalf of the other host. In the exhibit, the vSRX device is configured to use a pool of addresses that are in the same subnet as the external interface ge-0/0/0 for source NAT. This means that the vSRX device will translate the source IP address of the internal hosts to one of the addresses in the pool before sending the packets to the external network. However, the external hosts will not know how to reach the NATed addresses, since they are not directly connected to the vSRX device. They will send ARP requests for the NATed addresses, expecting to receive a MAC address from the vSRX device. If proxy ARP is not enabled on the vSRX device, it will not respond to these ARP requests, since it does not have the NATed addresses configured on its interface. The ARP requests will time out and the packets will be dropped by the external hosts or the service provider router. To solve this problem, proxy ARP must be enabled on the vSRX device for the NATed addresses. This will allow the vSRX device to respond to the ARP requests from the external hosts, providing its own MAC address as the destination. The external hosts will then send the packets to the vSRX device, which will reverse the NAT and forward the packets to the internal hosts. References:

• Configuring Proxy ARP (CLI Procedure)
• [SRX] When and how to configure Proxy ARP (https://supportportal.juniper.net/s/article/SRX-Dynamic-VPN-scenario-for-configuring-Proxy-ARP-on-SRX?language=en_US)

According to the exhibit, which is a configuration snippet of the SRX Series device, the global mode for the device is set to switching mode. This means that the device is operating as a Layer 2 switch and does not apply any security policies to the traffic between hosts in the same broadcast domain1. Therefore, the traffic between two hosts in the same broadcast domain are not matching any security policies.

To solve this problem, the user should change the global mode to transparent bridge mode. This means that the device will operate as a Layer 2 transparent bridge and apply security policies to the traffic between hosts in the same broadcast domain2. This will allow the user to enforce security policies based on the source and destination IP addresses, ports, and protocols of the traffic.

To change the global mode to transparent bridge mode, the user should use the following command:

set protocols l2-learning global-mode transparent-bridge

This command will set the global mode for the SRX Series device as Layer 2 transparent bridge mode. After changing the mode, the user must reboot the device for the configuration to take effect2.

References: 1: global-mode (Protocols) 2: Configuring Layer 2 Transparent Mode

Certificate RenewalThe renewal of certificates is much the same as initial certificate enrollment except you are just replacing an old certificate(about to expire) on the VPN device with a new certificate. As with the initial certificate request, only manual renewal issupported. SCEP can be used to re-enroll local certificates automatically before they expire. Refer to Appendix D for moredetails.

You must set up a DDoS solution for your ISP. The solution must be agile and not block legitimate traffic. The two products that will accomplish this task are:

• B. MX Series device. MX Series devices are high-performance routers that can provide DDoS protection at the network edge by integrating with Corero SmartWall Threat Defense Director (TDD) software. MX Series devices can leverage the packet processing capabilities of the MX-SPC3 Services Card to perform real-time DDoS detection and mitigation at line rate, scaling from 50 Gbps to 40 Tbps. MX Series devices can also use Juniper Networks Security Intelligence (SecIntel) to receive threat intelligence feeds from Juniper ATP Cloud or Juniper Threat Labs and apply them to the security policies. MX Series devices can provide an agile and effective DDoS solution for your ISP without blocking legitimate traffic12.
• C. Corero SmartWall TDD. Corero SmartWall TDD is a software solution that runs on MX Series devices and PTX Series devices to provide DDoS protection at the network edge. Corero SmartWall TDD uses behavioral analytics and detailed network visibility to detect and block DDoS attacks in seconds, without affecting the normal traffic. Corero SmartWall TDD can also provide advanced protection from “carpet bombing” attacks, 5G DDoS visibility, and multi-tenant portal for as-a-service offerings or views by department within an enterprise. Corero SmartWall TDD can provide an agile and effective DDoS solution for your ISP without blocking legitimate traffic34.

The other options are incorrect because:

• A. Contrail Insights. Contrail Insights is a software solution that provides network analytics and visibility for cloud and data center environments. Contrail Insights can help you monitor, troubleshoot, and optimize the performance and security of your network, but it does not provide DDoS protection by itself. Contrail Insights can integrate with other Juniper products, such as Contrail Enterprise Multicloud, Contrail Service Orchestration, and AppFormix, to provide a comprehensive network management solution, but it is not a DDoS solution for your ISP5.
• D. SRX Series device. SRX Series devices are high-performance firewalls that can provide DDoS protection at the network perimeter by integrating with Juniper ATP Cloud and Juniper Threat Labs. SRX Series devices can use SecIntel to receive threat intelligence feeds from Juniper ATP Cloud or Juniper Threat Labs and apply them to the security policies. SRX Series devices can also use IDP to detect and prevent application-level attacks, such as SQL injection, cross-site scripting, and buffer overflow. SRX Series devices can provide a robust and effective DDoS solution for your network, but they are not designed to handle high-volume DDoS attacks at the network edge, as MX Series devices and Corero SmartWall TDD are .

References:

• Juniper and Corero Joint DDoS Protection Solution
• MX-SPC3 Services Card Overview
• Corero SmartWall Threat Defense Director (TDD)
• Juniper Networks and Corero: A Modern Approach to DDoS Protection at Scale
• Contrail Insights Overview
• [SRX Series Services Gateways]
• [Juniper Networks Security Intelligence (SecIntel)]

The two valid modes for the Juniper ATP Appliance are all-in-one and core. The all-in-one mode is a single appliance that performs both the collector and the core functions. The collector function collects traffic from the network and sends it to the core function for analysis and detection. The core function performs the threat detection, mitigation, and analytics. The all-in-one mode is suitable for small to medium-sized networks that do not require high scalability or performance. The core mode is a dedicated appliance that performs only the core function. The core mode is used in conjunction with one or more collector appliances that collect traffic from the network and send it to the core appliance for analysis and detection. The core mode is suitable for large-scale networks that require high scalability and performance. References: Juniper Security, Professional (JNCIP-SEC) Reference Materials source and documents: https://www.juniper.net/documentation/en_US/junos/topics/concept/security-atp-appliance-overview.html

The solution to this problem is to enable address persistence. This will ensure that the same external IP address is used for multiple sessions between an internal host and an external host. This will result in only one authentication being required, as the same external IP address will be used for all sessions.

You are required to secure a network against malware. You must ensure that in the event that a compromised host is identified within the network, the host is isolated from the rest of the network. In this scenario, after a threat has been identified, the two components that are responsible for enforcing MAC-level infected host are:

• C. Policy Enforcer. Policy Enforcer is a software solution that integrates with Juniper ATP Cloud and Juniper ATP Appliance to provide automated threat remediation across the network. Policy Enforcer can receive threat intelligence feeds from Juniper ATP Cloud or Juniper ATP Appliance and apply them to the security policies on the SRX Series devices and the EX Series devices. Policy Enforcer can also enforce MAC-level infected host, which is a feature that allows you to quarantine a compromised host by blocking its MAC address on the switch port. Policy Enforcer can communicate with the EX Series devices and instruct them to apply the MAC-level infected host policy to the infected host1.
• D. EX Series device. EX Series devices are Ethernet switches that can provide Layer 2 and Layer 3 switching capabilities and security features. EX Series devices can integrate with Policy Enforcer and Juniper ATP Cloud or Juniper ATP Appliance to provide automated threat remediation across the network. EX Series devices can support MAC-level infected host, which is a feature that allows them to quarantine a compromised host by blocking its MAC address on the switch port. EX Series devices can receive instructions from Policy Enforcer and apply the MAC-level infected host policy to the infected host2.

The other options are incorrect because:

• A. SRX Series device. SRX Series devices are high-performance firewalls that can provide Layer 3 and Layer 4 security features and integrate with Juniper ATP Cloud or Juniper ATP Appliance to provide advanced threat prevention. SRX Series devices can receive threat intelligence feeds from Juniper ATP Cloud or Juniper ATP Appliance and apply them to the security policies. However, SRX Series devices cannot enforce MAC-level infected host, which is a feature that requires Layer 2 switching capabilities and is supported by EX Series devices3.
• B. Juniper ATP Appliance. Juniper ATP Appliance is a hardware solution that provides advanced threat prevention by detecting and blocking malware, ransomware, and other cyberattacks. Juniper ATP Appliance can analyze the network traffic and identify the compromised hosts based on their behavior and communication patterns. Juniper ATP Appliance can also send threat intelligence feeds to Policy Enforcer and SRX Series devices to enable automated threat remediation across the network. However, Juniper ATP Appliance cannot enforce MAC-level infected host, which is a feature that requires Layer 2 switching capabilities and is supported by EX Series devices.

References:

• Policy Enforcer Overview
• EX Series Switches Overview
• SRX Series Services Gateways Overview
• [Juniper ATP Appliance Overview]

According to the Juniper documentation, the infected host score is a global setting that determines the minimum threat level required for a host to be considered infected and blocked by Juniper ATP Cloud. The infected host score can be configured from 1 to 10, where 1 is the lowest and 10 is the highest. The default infected host score is 5, which means that any host with a threat level of 5 or higher will be automatically blocked by Juniper ATP Cloud. However, the infected host score can be changed to a higher value, such as 6 or 7, to reduce the number of false positives and allow more traffic to pass through. In the exhibit, the host has a threat level of 5, which indicates that it is infected with malware and has attempted to contact command-and-control servers. However, some of the events have not been automatically mitigated, which means that the host has not been blocked by Juniper ATP Cloud. A possible reason for this behavior is that the infected host score is globally set above a threat level of 5, such as 6 or 7, which means that the host does not meet the minimum threshold for blocking. Therefore, the correct answer is C. The infected host score is globally set above a threat level of 5. References: [Configuring the Infected Host Score] 1, [Compromised Hosts: More Information] 2

1: https://www.juniper.net/documentation/us/en/software/sky-atp/atp-cloud-user-guide/topics/task/sky-atp-infected-host-score.html  2: https://www.juniper.net/documentation/us/en/software/sky-atp/atp-cloud-user-guide/topics/concept/sky-atp-infected-host-overview.html

• The packet is processed as host inbound traffic because the traceoptions output shows that the destination IP address 10.10.10.1 belongs to the SRX device itself, which is configured with the ge-0/0/1.0 interface. The traceoptions output also shows the flag flow_host_inbound, which indicates that the packet is destined to the device.
• The packet matches the default security policy because the traceoptions output shows that the policy name is default-deny, which is the implicit system-default security policy that denies all packets. The traceoptions output also shows the flag flow_policy_deny, which indicates that the packet is denied by the policy.

References:

• traceoptions (Security NAT) | Junos OS | Juniper Networks
• [SRX] How to interpret Flow TraceOptions output for NAT troubleshooting
• Default Security Policies | Junos OS | Juniper Networks

To modify the configuration to fulfill the requirements, you need to modify the log-all term to add the next term action. The other options are incorrect because:

• B. Deleting the log-all term would prevent logging all traffic, which is one of the requirements. The log-all term matches all traffic from any source address and logs it to the system log file1.
• C. Adding a term before the log-all term that blocks Telnet would also prevent logging all traffic, because the log-all term would never be reached. The firewall filter evaluates the terms in sequential order and applies the first matching term. If a term before the log-all term blocks Telnet, then the log-all term would not match any traffic and no logging would occur2.
• D. Applying a firewall filter to the loopback interface that blocks Telnet traffic would not block inbound Telnet traffic on interface ge-0/0/3, which is another requirement. The loopback interface is a logical interface that is always up and reachable. It is used for routing and management purposes, not for filtering traffic on physical interfaces3.

Therefore, the correct answer is A. You need to modify the log-all term to add the next term action. The next term action instructs the firewall filter to continue evaluating the subsequent terms after matching the current term. This way, the log-all term would log all traffic and then proceed to the block-telnet term, which would block only inbound Telnet traffic on interface ge-0/0/34. To modify the log-all term to add the next term action, you need to perform the following steps:

• Enter the configuration mode: user@host> configure
• Navigate to the firewall filter hierarchy: user@host# edit firewall family inet filter block-telnet
• Add the next term action to the log-all term: user@host# set term log-all then next term
• Commit the changes: user@host# commit

References:

• log (Firewall Filter Action)
• Firewall Filter Configuration Overview
• loopback (Interfaces)
• next term (Firewall Filter Action)

According to the output of the traceoptions file called radius, the source of the problem is that the RADIUS server IP address is unreachable. This is indicated by the line FAILURE: sendto: No route to host, which shows that the SRX device cannot send the authentication request to the RADIUS server. This could be due to a network issue, such as a misconfigured route, a firewall blocking the traffic, or a physical link failure.

To troubleshoot this issue, the user should check the following:

• The RADIUS server IP address and port are correctly configured on the SRX device. The user can verify this by using the command show configuration access radius-server1.
• The SRX device can ping the RADIUS server IP address. The user can use the command ping  to test the connectivity2.
• The SRX device has a valid route to the RADIUS server IP address. The user can use the command show route  to check the routing table3.
• The SRX device and the RADIUS server are using the same shared secret key. The user can verify this by using the command show configuration access radius-server secret1.
• The SRX device and the RADIUS server are using the same authentication protocol. The user can verify this by using the command show configuration access profile 4.
• The firewall policies on the SRX device and any intermediate devices are allowing the RADIUS traffic. The user can use the command show security policies from-zone to-zone  to check the firewall policies5.

References: 1: Configuring RADIUS Server Parameters 2: ping - Technical Documentation - Support - Juniper Networks 3: show route - Technical Documentation - Support - Juniper Networks 4: Configuring Authentication Profiles 5: show security policies - Technical Documentation - Support - Juniper Networks

The exhibit shows the output of the "show interfaces ge-0/0/5.0 extensive" command on an SRX Series device. The output includes a section called "Security" that lists the protocols that are allowed on the ge-0/0/5.0 interface. The protocols that are allowed on the ge-0/0/5.0 interface are:

• OSPF
• DHCP
• NTP

It's important to notice that the output don't have IBGP, IPsec, so these protocols are not allowed on the ge-0/0/5.0 interface.

The exhibit shows the output of the show security mka sessions summary command on an SRX Series device. This command displays the status of the MACsec Key Agreement (MKA) sessions on the device. In the output, we can see that there are two CAKs configured for the interface ge-0/0/1 - FFFF and EEEE. The CAK named FFFF has the type preceding and the status live. The CAK named EEEE has the type fallback and the status active.

The two statements that are true about the CAK status for the CAK named FFFF are:

• CAK is not used for encryption and decryption of the MACsec session. This is because the CAK is only used for authentication and key exchange between the MACsec peers. The CAK is not used for encrypting or decrypting the MACsec traffic. The encryption and decryption of the MACsec session is done by the Secure Association Key (SAK), which is derived from the CAK using the MKA protocol.
• SAK is not generated using this key. This is because the CAK named FFFF has the type preceding, which means that it is a legacy key that is used for backward compatibility with older MACsec devices. The preceding key is not used for generating the SAK, but only for authenticating the MACsec peers. The SAK is generated using the active key, which is the CAK named EEEE in this case.

References: Juniper Security, Professional (JNCIP-SEC) Reference Materials source and documents: https://www.juniper.net/documentation/en_US/junos/topics/reference/command-summary/show-security-mka-sessions-summary.html https://www.juniper.net/documentation/en_US/junos/topics/concept/security-macsec-overview.html

Juniper ATP Cloud performs cache lookup to see if the file is seen already and known to be malicious and dynamic analysis to see what happens if you execute the file in a real environment.

• Cache lookup is one of the functions that Juniper ATP Cloud performs to analyze and detect malware. Cache lookup is the first step in the pipeline approach that Juniper ATP Cloud uses to examine files. Cache lookup checks whether the file has been seen before and whether it has a stored verdict in the database. If the file is known to be malicious, the verdict is returned to the SRX Series Firewall and the file is dropped. If the file is not found in the cache, the analysis continues with the other techniques1.
• Dynamic analysis is another function that Juniper ATP Cloud performs to analyze and detect malware. Dynamic analysis runs the file in a sandbox environment and observes its behavior and actions. Dynamic analysis can reveal the hidden or obfuscated functionality of malware, such as network connections, file modifications, registry changes, and process injections. Dynamic analysis can also detect zero-day threats and evasive malware that try to avoid static analysis1.

References:

• How is Malware Analyzed and Detected? | ATP Cloud | Juniper Networks

The exhibit shows the output of the show security macsec statistics interface ge-0/0/70 detail command on an SRX Series device. This command displays the statistics for the Media Access Control Security (MACsec) feature on the ge-0/0/70 interface. MACsec is a feature that provides point-to-point security on Ethernet links by using encryption and data integrity checks. MACsec uses two types of keys to secure the traffic: the Connectivity Association Key (CAK) and the Secure Association Key (SAK). The CAK is used for authentication and key exchange between the MACsec peers. The SAK is used for encryption and decryption of the MACsec traffic.

The two statements that are true based on the exhibit are:

• The data that traverses the ge-0/0/70 interface is secured by a secure association key. This is because the exhibit shows that the interface has a Secure Channel (SC) and a Secure Association (SA) established. The SC is a logical connection between the MACsec peers that carries the encrypted traffic. The SA is a subset of the SC that contains the SAK and other parameters for encrypting and decrypting the traffic. The exhibit shows that the interface has encrypted and protected packets, which means that the traffic is secured by the SAK.
• The data that traverses the ge-0/0/70 interface cannot be intercepted and read by anyone. This is because the exhibit shows that the interface has encryption enabled. The encryption option indicates whether the MACsec traffic is encrypted or not. If encryption is enabled, the traffic is encrypted by the SAK and cannot be viewed by anyone monitoring the link. If encryption is disabled, the traffic is only protected by the SAK and can be viewed by anyone monitoring the link.

References: Juniper Security, Professional (JNCIP-SEC) Reference Materials source and documents: https://www.juniper.net/documentation/en_US/junos/topics/reference/command-summary/show-security-macsec-statistics-interface-detail.html https://www.juniper.net/documentation/en_US/junos/topics/concept/security-macsec-overview.html

The IPS signature database is one of the major components of the intrusion prevention system (IPS). It contains definitions of different objects, such as attack objects, application signature objects, and service objects, that are used in defining IDP policy rules. As a response to new vulnerabilities, Juniper Networks periodically provides a file containing attack database updates on the Juniper Networks website. You can download this file to protect your network from new threats. Note: IPS does not need a separate license to run as a service on the SRX Series Firewall; however, a license is required for IPS updates1.

When you configure a chassis cluster, the two nodes back up each other, with one node acting as the primary device and the other as the secondary device, ensuring stateful failover of processes and services in the event of system or hardware failure. If the primary device fails, the secondary device takes over processing of traffic2.

To download and install the IPS signature database to a device operating in chassis cluster mode, you must perform the following steps:

• Download the IPS signature package from the Juniper Networks website to the primary node of the chassis cluster. You can use the request security idp security-package download CLI command or the Security Director user interface to download the package. Note: You must have a valid license key installed on the device to download the package3.
• Install the IPS signature package on the primary node of the chassis cluster. You can use the request security idp security-package install CLI command or the Security Director user interface to install the package. Note: You must reboot the primary node after installing the package3.
• Synchronize the IPS signature package from the primary node to the backup node of the chassis cluster. You can use the request security idp security-package install-backup CLI command or the Security Director user interface to synchronize the package. Note: You do not need to reboot the backup node after synchronizing the package3.

Therefore, the correct answer is A. You must download and install the IPS signature package on the primary node. The other options are incorrect because:

• B. The first synchronization of the backup node and the primary node is performed automatically after you install the package on the primary node. You do not need to perform it manually3.
• C. The first time you synchronize the IPS signature package from the primary node to the backup node, the primary node does not need to be rebooted. You only need to reboot the primary node after installing the package3.
• D. The IPS signature package does not need to be downloaded and installed on the primary and backup nodes separately. You only need to download and install it on the primary node and then synchronize it to the backup node3.

References:

• IDP Signature Database Overview
• Understanding IDP Signature Database for Migration
• Configuring Chassis Clustering on SRX Series Devices