A company has built an OSPF network as shown in the following figure. The links form an OSPF neighbor relationship. All devices have announced their own loopback address. On one day, the S1-R2 and S2-R1 links are faulty. Which of the following description is correct? (Area 0 is split) (Multiple choice)

• A.R5 can learn the loopback route of R2 normally.
• B.R3 cannot learn the loopback route of R2.
• C.R1 can learn the loopback route of R2 normally.
• D.R3 can learn the loopback route of R2 normally.

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Which of the following IEEE standards was developed for Gigabit Ethernet? (Multiple Choice)

• A.802.3z
• B.802.3ab
• C.802.3af
• D.802.3ad

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When configured ISIS the area authentication, which ISIS packets will carry the Bands authentication information?

• A.SNP and LSP of LeveL-2 of ISIS.
• B.Hello packets of Level-2 of ISIS.
• C.SNP and LSP of Level-1 of ISIS.
• D.Hello packets of Level-1 of ISIS.

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Which of the following advanced features does BGP EVPN support?

• A.ARP broadcast suppression
• B.VRRP over VXLAN
• C.VXLAN Qos
• D.Multi-live gateway

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Which types of messages are supported by the BGP protocol? (Multiple Choice)

• A.Hello
• B.Open
• C.Keepalive
• D.Update

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