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(Multiple choice) When the OLT main control board CPU is detected to be continuously elevated, the following possible causes are?
(Radio) When the invitation message sent by user A reaches user B after passing through server C, D, E, the message received by user B is VIA. The server address of the field information record is in descending order.
(Single choice) The following statement about ssH connection is incorrect, yes
(Single) A total of 100 multicast users on OLT are watching 20 multicast programs, assuming that each multicast program occupies 2M bandwidth, then how much multicast traffic is currently on the OLT upstream port
The number of users under the OLT can also determine whether the VLA is single-layer or dual-layer VLA. Single-layer VLANs can be used when the number of users is small, and dual-layer VLANs must be used when the need to distinguish services and the number of users is second to ().
In the evolution of EPON to 10g EPON, a smooth transition is achieved at the local end by adding AWDM WDM module, and Odn coexists.
(Radio) In the ACL, if you need to filter the packet according to the source IP address information, destination IP address information, port number and other information of the packet, then the acl number template created is
The maximum spectroscopic ratio supported by 10G GPON is (Radio) ?
Max-Forwards fields can be used in S1P messages to solve loop problems and avoid endless packet forwarding.
The complete SIP message interaction process will contain multiple request and response messages, and the sIP message header field can be used to describe what the specific solution corresponding to the current response message is