Which of the following expressions can only match BGP routing entries that pass through AS200 and then AS300?

• A._(200 300)_
• B.^200 | ^300
• C.200$ | 300$
• D._[200 300]_

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Which of the following is not the role of EVPN Type2 routing?

• A.Host MAC address Announcement
• B.Host ARP Announcement
• C.Host IP route Announcement
• D.BUM message forwarding

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OSPFv2 is an IGP running on an IPv4 network; OSPFv3 is an IGP running on an IPv6 network. Compared with OSPFv2, OSPFv3 has a similar LSA type, but the functions are slightly different.
Which of the following is not included in the LSA type of OSPFv3?

• A.Router-LSA
• B.Network-LSA Router-LSA Network-LSA Inter-Area-Prefix-LSA Inter-Area-Router-LSA AS-External-LSA Group-membership-LSA Type-7-LSA Link-LSA Intra-Area-Prefix-LSA
• C.ASBR-Summary-LSA
• D.AS-External-LSA

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As shown in the figure below, R1, R2, and R3 have enabled IPv6 in the ISIS process and established a Leve12 neighbor relationship. Which of the following statements are correct about the IP routing table of R3? (Multiple choice)

• A.2021:: /64 route will appear in the IP routing table
• B.2019:: /64 route will appear in the IP routing table
• C.2020:: /64 route will appear in the IP routing table
• D.The 2022:: /64 route will appear in the IP routing table

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Which of the following statements about VLAN aggregation are correct? (Multiple questions)

• A.A Super VLAN can contain one or more Sub-VLANs
• B.Super Sub-VLAN contains physical interfaces, which can establish a three-layer VLANIF interface
• C.Sub-VLAN is used to isolate the broadcast domain
• D.Sub-VLAN contains physical interfaces, and can establish a three-layer VLANIF interface

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