Câu 5: 642-885: Deploying Cisco Service Provider Advanced Routing (SPADVROUTE)

Refer to the topology diagram shown in the exhibit and the partial configurations shown below. Once the attack from 209.165.201.144/28 to 209.165.202.128/28 has been detected, which additional configurations are required on the P1 IOS-XR router to implement source-based remote-triggered black hole filtering?!router bgp 123address-family ipv4 unicastredistribute static route-policy test!

1. A. router staticaddress-family ipv4 unicast209.165.202.128/28 null0 tag 666192.0.2.1/32 null0 tag 667!route-policy testif tag is 666 thenset next-hop 192.0.2.1endifif tag is 667 thenset community (no-export)endifend-policy!
2. B. router staticaddress-family ipv4 unicast209.165.201.144/28 null0 tag 666192.0.2.1/32 null0 tag 667!route-policy testif tag is 666 thenset next-hop 192.0.2.1endifif tag is 667 thenset community (no-export)endifend-policy!
3. C. router staticaddress-family ipv4 unicast209.165.201.144/28 null0 tag 666192.0.2.1/32 null0!route-policy testif tag is 666 thenset next-hop 192.0.2.1set community (no-export)endifend-policy — đáp án hiện tại
4. D. router staticaddress-family ipv4 unicast209.165.202.128/28 null0 tag 666192.0.2.1/32 null0!route-policy testif tag is 666 thenset next-hop 192.0.2.1set community (no-export)endifend-policy!