Huawei H12-322 Huawei Certified ICT Professional - Wireless Local Area Network- Planning and Optimizing Enterprise WLAN Exam Practice Test

This network diagram is the data forwarding mode of the datagram. All data packets in the figure are not AC.

All management messages must be forwarded through the tunnel.

All signaling packets can be forwarded directly without forwarding through the tunnel.

The wireless user service data in this network needs to be converted to 802.3 and 802.11 packets on the AC, and then through the upstream aggregation switch.

Forwarding

By default, the CAPWAP broken link service hold function is enabled.

By default, the CAPWAP broken link service hold function is not enabled.

In the tunnel forwarding mode, the CAPWAP is broken and the user service is not interrupted.

In direct forwarding mode, CAPWAP is broken, and user services are not interrupted.

VRRP hot standby solution

Dual-link cold standby solution

Dual-link hot standby solution

Stacking hot standby solution

802.11an

802.11gn

802.11bgn

802.11ac

The hangover network can perform WLAN deployment without modifying the physical topology of the live network, which facilitates network transformation.

When the network is bypassed, the AC can no longer bear the gateway of the service WLAN.

Using the “side-by-side networking + direct forwarding” network architecture can reduce the burden on the AC and improve network forwarding performance.

When the network is connected to the network, the AC can be connected to the aggregation layer or the core layer switch, but it must be the same network segment as the AP.

University classroom wireless coverage

Office building wireless coverage

University dormitory wireless coverage

Hotel WOC wireless coverage

AP6510DN

AP6610DN

AP8030DN

AP8130DN

1

2

3

Multiple

In order to ensure coverage of a larger area, the antenna should be as high as possible

In order to ensure that there is no black under the tower, the antenna should be as low as possible.

Directional antenna hanging height is not recommended more than 12m

The omnidirectional antenna hanging height is recommended to exceed 12m

Confirm the overall rules of the route, you need to confirm with the owner whether you can punch through the wall, whether you can take the open line, whether there is conditional hidden line, the network cable is

Do you want to use a wire slot or add a conduit?

In the survey process, the length of the trace should be calculated according to the actual environment, and the length of the trace is not required.

If the AP needs AC power supply, it needs to confirm the location of the power supply. If there are special requirements for the route in some locations, additional marking is required.

In the outdoor scene survey, each outdoor AP installation location needs to consider the routing problem.

Beacon frame

Disassociation frame

Deauthentication frame

Probe frame

The number of antennas in a single AP band is 4~8, and it is recommended that no more than 10 antennas under normal circumstances.

Under normal circumstances, the distance between the AP and the far-end room sub-antenna is controlled within 50 meters, and it is recommended not to exceed 60 meters.

In a typical room sub-scenario, it is recommended that the output power of each antenna be basically the same, and the output power is controlled at 12~18dBm. The specific power selection and field

Strong demand is related to the wall structure

There is interference between the room division antennas of the same AP, so it cannot be placed intensively according to requirements.

5G_19dBi_H15 degrees _V15 degrees

5G_17dBi_H65 degrees _V7.5 degrees

5G_16dBi_H100 degrees _V5.5 degrees

5G_28dBi_H5 degrees _V5 degrees

802.11a

802.11ac

802.11g

802.11n

Adjust the AP position

Reduce the transmit power

Adjust the antenna angle

Increase the transmit power

Office coverage, high concurrency, medium density

Concert hall coverage, low concurrency, high density

ward inspection, no bandwidth requirements, need good coverage

Hotel rooms are covered, the rooms are small and dense, and there are certain requirements for coverage area and field strength.

True

False

True

Falses

15s * 6

25s * 3

20s * 3

25s * 6

Wooden door

Glass window

Brick wall

Metal

Tip shows the signal information around the point

Tip box must be placed on the heat map for 3S and above to display

The SINR and PHY Data Rate that are not displayed in the Tip box are 0.

Tip box only shows the SINR and PHY Data Rate of the maximum field strength value.

Recommended coupling

The last hop is generally connected to the 5dB coupler.

Need to ensure that the output power of each antenna is almost the same

Can provide dual frequency coverage

20dBm

23dBm

25dBm

26dBm

WEP certification

WPA2-PSK certification

WPA2-EAP certification

MAC certification

10dBm

12dBm

14dBm

15dBm

Turn on 2.4G and 5G dual frequency

Increase AP transmit power

Turn on pure N mode

Turn on the signal threshold access

Using room divider antenna

The WLAN forwarding model includes two modes: local forwarding mode and centralized forwarding mode.

The data forwarding mode of the datagram is also called the tunnel forwarding mode. The service data packets are uniformly encapsulated by the AP and then forwarded to the AC.

Line-to-AP management, also acting as a forwarding hub for AP traffic

The datagram is forwarded in text, that is, the AP management flow is encapsulated in the CAPWAP tunnel and reaches the AC termination; the AP service flow is not encapsulated by the CAPWAP.

Directly sent by the AP to the switching device for direct forwarding

The data packet is forwarded in a centralized manner, that is, the AP management flow is encapsulated in the CAPWAP tunnel and the AC is terminated. The AP service flow is not encapsulated by the CAPWAP.

Directly sent by the AP to the switching device for direct forwarding

When viewing the survey, directly view the Wi-Fi signal scan box.

Reduce the current drawing scale

Before the survey, first add the AP group to speed up the simulation.

Modify the global configuration parameters to simulate the data processing granularity to the maximum value, speed up the simulation speed

Combine multiple input signals into one output, and then split the mixed signal in the opposite direction.

Average one signal into multiple outputs

Take the required signal energy from the main line to the near-end antenna and allocate more signal energy to the far-end antenna

Connect the RF port of the AP to the antenna interface.

In the wireless relay application scenario, as long as the line of sight is reachable between the stations

Avoid interference from strong electric and other signals near the site

Site needs to have reliable power

The higher the location of the site, the better.

Chain networking

Diamond network

T-type network

Oval

30~50 meters

80~100 meters

150~200 meters

200~250 meters

HSB backup can be divided into real-time backup, batch backup, and scheduled backup.

The HSB jumper in the middle of the active and standby ACs is used to synchronize AP status, user information, and DHCP address pool information.

The heartbeat period of the HSB channel defaults to 1*3s, so the default service interruption time is 3s.

The heartbeat time and period of the HSB can be modified on the AC.

Multiple types of business access control

There are many user terminals, and the types are concentrated.

Users only connect in a certain area, no need to consider roaming

Large number of user registration management, centralized user authentication

100ns

200ns

400ns

800ns

FIT AP is a traditional AP. In addition to providing basic wireless connectivity, it also provides security, management, and performance enhancements

FIT AP cannot be used in conjunction with AC

FIT AP differentiates from traditional FAT APs, providing only reliable, high-performance wireless connectivity, while stripping other features

FIT AP must be used in conjunction with AC

The network is divided into access layer, distribution layer and core layer.

AP is connected to the access layer switch. It is recommended to use a PoE switch.

AC can be implemented using the built-in AC card of the core switch.

At the access layer, you can use the side-mounted CA to implement wireless centralized control.

25dB

10dB

35dB

15dB

True

False

1， 6， 11 / 6， 11， 1 / 11， 1， 6

1， 11， 6 / 6， 11， 1 / 11， 1， 6

1， 6， 11 / 6， 1， 11 / 11， 1， 6

11， 1， 6 / 1， 6， 11 / 6， 11， 1

Azimuth specifies the coverage direction of the antenna

Azimuth can be understood as the angle that the plane in the north direction rotates clockwise to coincide with the plane of the antenna.

Downtilt angle affects the coverage of the antenna in the vertical direction

The downtilt angle is the angle between the antenna and the vertical plane

2Mbps

4Mbps

6Mbps

8Mbps