Compared to IPV4 multicast, which of the following descriptions is the characteristic of IP6 multicast?

• A.IPv6 multicast clients use IGMPv3 to join multicast groups
• B.IPv6 multicast does not contain MSDP and dense mode
• C.The first 8bit IPV6 multicast address is always FF(11111111).
• D.IPv6 multicast load sharing extends the multicast routing rules and is completely independent of RPF check

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The following description of ISIS's routed infiltration is correct? (Multi-select)

• A.Route penetration for ISIS does not include aggregated routes.
• B.Route infiltration of ISIS is used to prevent routing loops.
• C.ISIS routing penetrates | Can be used in Pv6 environments.
• D.Route penetration of ISIS does not cause neighbor concussions.
• E.Route penetration for ISIS can be deployed on Level-1 routers.

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BGP EVPN does MAC address advertisement, ARP message advertisement, and IRB route advertisement for which BGP EVPN route is advertised?

• A.Type1
• B.Type4
• C.Type2
• D.Type3

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In the following topology diagram,

R1 can be established between R2 and R3 fetches the Internet, RI and R2, R1 and R3 EGP connections, R2, R3 belong to the same AS. The default routes are issued through BGP separately, requiring R2 to be preferred for traffic accessed by RI to the Internet, and the following practices can be achieved

• A.R2 specifies that peer R1 is in export. The direction setting local priority is 150
• B.R2 specifies peer R1 in the export direction setting MED property to 150
• C.R1 specifies the peer R2 sets the local priority in the import direction to 150
• D.R1 specifies that peer R3 sets the MED property to 150 in the import direction

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IS-IS is a link-state routing protocol that uses the SPF algorithm for route calculations. As shown in the figure, at the same time, a certain area has IPV4 and IPV6 and runs IS-IS to achieve network interconnection, of which R2 only supports IPV4 Regarding the topology calculation of the network, which of the following statements is correct?

• A.By default, IPv6 is not supported because R2. Therefore, in the shortest path tree formed by the JPv6 network computation, the path where R1 accesses R4 is: R1-R3-R4
• B.By default, in the shortest path tree formed by the IPv6 network calculation, R1 accesses R4 as R1-R2-R4, since R2 does not support IPv6. Therefore, R2 will directly drop the IPv6 packet after receiving it, and select the traffic loss
• C.If you want the IPv4 and IPv6 networks to compute the same shortest path tree. The IPv6-enable topology lpv6 command is required to enable the Russian force of IPv6 under the IS-IS process
• D.By default, IPv4 and IIPV6 networks are computed separately to form different shortest path trees

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