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H3C Constructing H3C High-Performance Campus Networks Sample Questions:

1. The SNMP protocol adopts the C/S structure and gives UDP to realize the message transmission. In order to ensure the normal interaction of protocol messages between the network management workstation and SNMP, they all need to monitor the specific UDP port number. The following statement about them is correct.

A) The gateway workstation monitors UDP port 162, and the SNMP agent monitors UDP port 161
B) Both the gateway workstation and SNMP agent monitor UDP port 162
C) Both the network management workstation and the SNMP agent monitor UDP port 161
D) The gateway workstation monitors UDP port 161, and the SNMP agent monitors UDP port 162

2. Routers running PIM-DM will periodically send Hello messages to discover neighbors, establish and maintain neighbor relationships. The following descriptions of Hello messages are correct. __

A) If the remaining routers do not receive the Hello message sent by the DR within the timeout period, a new DR election process is triggered
B) The router sends PIM Hello in multicast mode, the destination address is 224.0.0.13
C) When the DR is elected, the router with the higher priority of the Hello message will become the DR
D) If Hello messages have the same priority, the router with the smaller interface IP address will become the DR
E) When there are multiple routers running IGMPV1 on the shared network segment, the DR is elected for the shared network segment through the PIMHello message, and the DR serves as the Querier of IGMP

3. What is the correct statement about the MSTP calculation process?

A) After the MSTI calculation is completed, the data flow between the domain and the domain must pass through the Master port
B) The mapping relationship between VLANs and instances in different MST regions is independent and can be different or the same
C) Root bridge of MSTI The root bridge of IST can be the same switch
D) After the MSTI calculation is completed, the same physical port may have different roles in different instances

4. In the PIM-DM networking, about the router sending Prune (prune) message, the description is correct.

A) After the router interface receives the Prune message, it will no longer send packets of the corresponding multicast group on this interface
B) Assert (Assert) The losing party sends Prune to the winning party
C) When the router has no local directly connected multicast receivers, it will send a Prune message to the upstream RPF neighbor
D) After the router RPF interface receives the Prune message, it will no longer receive packets from the corresponding multicast group on this interface
E) When the outgoing interface list in the router (S, G) entry is empty, it will send a Prune message to the upstream RPF neighbor

5. The customer purchases a router equipment. If the performance index of the router is MTBFW5000 and MTTRSOQ 5, the reliability of the router is

A) 99.9999%
B) 99.99%
C) 99.9%
D) 99.999%

Solutions: