How is an RSVP resv message sent back to the ingress router？

第1题

How does an IPv6 router deal with a packet that is larger than the outgoing interface MTU？（）A、It will fragment the packet at Layer 2.B、It will fragment the packet at Layer 3.C、It will drop the packet and send an ICMPv6 message "packet too big" back to the source.D、It will drop the packet.

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第2题

What is the purpose of the RSVP hello interval?（）A、It is the size of the RSVP hello packetB、It is how long it maintains RSVP neighborsC、It is the length of time between RSVP hello packetsD、It is how long the router waits before declaring a router to be down

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第3题

A router receives a packet from a neighbor with an MPLS shim header value of 0.What does the router do with this packet?（）A、It performs a label pop operation and an IP lookup.B、It performs a label swap operation and an IP lookup.C、It sends an error message toward the egress router.D、It sends an error message toward the ingress router.

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第4题

When learning a new route, if a LSA received is not found in the topological database, what will an internal OSPF router do?（）A、The sequence numbers are checked, and if the LSA is val id it is entered into the topology database.B、The LSA is placed in the topological database and an acknowledgement is sent to the transmitting router.C、The LSA is dropped and a message is sent to the transmitting router.D、The LSA is flooded imme diately out of all the OSPF interfaces, except the interface from which the LSA was received.

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第5题

Which message type is constructed and sent from an MSDP router to its MSDP peers when it  receives a PIM register message （knowing that the MSDP router is also configured as an RP for  the PIM domain）？（）A、Source-Active MessageB、PIM JoinC、PIM HelloD、MSDP Register

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第6题

Which of these statements about PIM join messages in classic PIM-SM is correct？（）A、PIM join messages are sent every 60 seconds to refresh the upstream router’s mroute state for the multicast tree.B、Routers send a PIM join acknowledgement in response to each PIM join message received from a downstream router.C、PIM join messages are only sent when the multicast distribution tree is first being established.D、PIM join messages are sent every three minutes to refresh the upstream router’s mroute state for the multicast tree.

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第7题

What is the optimize timer on an RSVP-signaled Label-Switched Path （LSP）？（）A、the time it takes to identify the optimal path for the LSPB、the interval at which the ingress router recalculates the LSP’s pathC、the time the ingress router takes to establish the primary pathD、the maximum number of times the ingress router tries to establish the primary path

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