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Last Updated: May 31, 2026
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1. Regarding the description of the hello message in the PIM-SM message, the error is?
A) Hello messages are sent to multicast address 224005
B) Elect dr in multiple router segments with hello messages
C) Routers periodically use hello messages to stay in touch
D) In a PIM-SM network, a newly started multicast router needs to use hello messages to discover neighbors and maintain neighbor relationships
2. In RSTP, which port provides a backup path to reach the root node of the spanning tree?
What state is the port in?
A) Alternate port and Discarding status
B) Root Port and Listening Status
C) Designated port and Listening status
D) Alternate Port and Forwarding Status
E) Alternate Port and Learning Status
3. Regarding the WRR (Weight Round Robin) description of the error is? (Multiple select).
A) WRR can no longer use
B) WRR guarantees that various queues are allocated to a certain amount of bandwidth
C) WRR avoids congestion in the network
D) WRR is a congestion management technique
E) WRR on GE interfaces to ensure that critical services are prioritized for
4. In the IS-IS broadcast network type, when establishing an adjacency relationship, if the router interface priority is set to 0, it will not participate in the dis election
A) True
B) False
5. D Class IP address range 239000-239255255,
What does 255 do? Radio
A) SSM multicast address, the multicast address segment is valid for the whole network
B) Locally managed multicast address, which is valid only locally
C) Link-local multicast address, where traffic that uses that address includes network control messages and that address range is only the multicast address segment used by the routing protocol
D) Any legitimate multicast traffic and multicast application can adopt this address
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: A | Question # 3 Answer: C,E | Question # 4 Answer: B | Question # 5 Answer: B |
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