Which of the following statements regarding OSPFv3 are true?

• A.The LSR packet contains the complete LSA header information, which is used for request updating LSAs.
• B.The Hello packet must contain interface ID of sending interface.
• C.The Option field of Hello and DD packets is extended to 24 bits.
• D.The LSAck packet contains the LSA header information, which is used for acknowledging the receipt of an LSA.

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After IS-IS area authentication is configured, which of the following ISIS packets will carry authentication information?

• A.IS-IS Level-2 Hello PDUs
• B.IS-IS Level-1 Hello PDUs
• C.IS-IS Level-1 SNPs and LSPs
• D.IS-IS Level-2 SNPs and LSPs

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RSVP is implemented in the following processes: R1 sends Path messages to request bandwidth reservation to its downstream node R2. After receiving the request, R2 responds to R1 through Resv (short for
"Reservation") messages. R2 then sends Path messages to request bandwidth reservation to its downstream node R3. This process repeats until reach the egress router.

• A.TRUE
• B.FALSE

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An enterprise sets up an OSPF network with the topology and areas shown in the diagram. OSPF adjacencies are formed between all devices on all links and all loopback interface addresses are advertised by OSPF. A fault occurs and the links from R1 to S2 and R2 to S1 fail. Which of the following statements are true? (Choose all that apply.)

• A.R3 can learn the route to the loopback interface of R2.
• B.R1 can learn the route to the loopback interface of R2.
• C.R5 can learn the route to the loopback interface of R2.
• D.R3 can not learn the route to the loopback interface of R2.

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On a broadcast network, DIS election starts only after the neighbor relationship is established.

• A.TRUE
• B.FALSE

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