The routers RTA and RTB belong to different autonomous systems. The BGP related configuration is as follows, then the ______ between RTA and RTB.
RTA]
bgp 65001
timer keepalive 15 hold 45
peerRTB as-number 65001
RTB]
bgp 65002
timer keepalive 10 hold 30
peerRTA as-number 65002

• A.can establish eBGP neighbor relationship, the holdtime of RTA is 15s, and the holdtime of RTB is 10s
• B.Failed to establish eBGP neighbor relationship
• C.can establish eBGP neighbor relationship, the holdtime of RTA is 30s, and the holdtime of RTB is 30s
• D.can establish eBGP neighbor relationship, the holdtime of RTA is 45s, and the holdtime of RTB is 30s

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As shown in the figure, EBGP runs between AS100, AS200, AS300, and AS400.
When AS100 receives the BGP route sent by AS400, the path sequence recorded in its AS-Path attribute is ______

• A.(400, 300.200)
• B.(100, 200, 300, 400)
• C.(200, 300, 400)
• D.(400, 300.200, 100)

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The following are aggregation layer functions are ______. (select one or more)

• A.complex routing strategy
• B.high-speed packet switching
• C.Access Security Control
• D.Has a large number of interfaces for connecting to end-user computers

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When the area authentication and domain authentication are configured in IS-IS, the IS-IS message types that are authenticated include _________.

• A.LSP
• B.CSNP
• C.PSNP
• D.Hello

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It is known that the configuration of a router's PBR is as follows:
policy-based-route pbr_a permit node 10
if-match acl 3000
if-match packet-length 101 1000
apploutput-interface serial 2/0
Assuming the policy is successfully applied, how will the relevant traffic on this router be forwarded?

• A.In the data flow matching Alc3000, the packets with the packet length of 101~1000 bytes will be forwarded according to the policy routing
• B.Data flow matching Alc3000 will be forwarded according to policy routing
• C.Packets with a length of 101~1000 bytes will be forwarded according to policy routing
• D.The data flow matching the Alc3000 and the packets with a packet length of 101~1000 bytes will be forwarded according to the policy routing

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