What are two features of 6RD IPv6 transition mechanism? (Choose two.)

1. A. It inserts IPv4 bits into an IPv6 delegated prefix.
2. B. It uses a native IPv6-routed network between CE routers and the BR router.
3. C. It allows dynamic 1:N translation of IPv6 address.
4. D. It uses stateful automatic 6to4 tunnels between CE routers and the BR router.
5. E. It uses stateless automatic 6to4 tunnels between CE routers and the BR router.

Correct Answer: AE

Which programmable API allows the service provider to plan and optimize the automation of network operations and achieve closed-loop operations?

1. A. Network Services Orchestrator
2. B. WAN Automation Engine
3. C. Evolved Programmable Network Manager
4. D. Crosswork Network Automation

Correct Answer: D

Refer to the exhibit. An organization s network recently experienced several significant outages due to device failures. The network administrator just moved the network devices to a new central data center, and packets are switched using labels. The administrator Is now implementing NSF on the network to reduce potential risk factors in the event of another outage. Which task must the administrator perform on each router as part of the process?

1. A. Remove route filtering to speed repopulation of the link-state database
2. B. Copy the router s existing state information and share the file with its peers to enable BGP soft resets
3. C. Implement MPLS to forward packets while the RIB updates after a faliover.
4. D. Implement Graceful Restart to mitigate the delay in MPLS LDP synchronization when the IGP starts up.

Correct Answer: D

Refer to the exhibit.


The network operations team reported that the access site that is connected to R3 is not connecting to the application server in the data center and that all packets that are sent from the application server to the access site are dropped. The team verified that OSPF and BGP peerings are up in BGP AS 65101 and BGP AS 65201. R4 is expected to receive traffic from the application server route via OSPF. Which action resolves this issue?

1. A. Remove the route-map on R4 when advertising 172.16.20.1 in BGP to R3.
2. B. Advertise application server 172.16.20.1 in the OSPF routing table on R6.
3. C. Allow 172.16.20.1 in the BGP advertisement on R3 in the route-map.
4. D. Add the next-hop-self command on R6 to enable R3 iBGP peering.

Correct Answer: D

The service provider is serving hosts with two different multicast streams from source X and source Y. Source X is multicast group 224.0.0.0/8, and source Y is multicast group 226.0.0.0/8. Multicast source X should send its stream through bidirectional RP address 10.20.1.1, and multicast source Y should send its stream through RP address 10.20.2.1. Which configuration meets these requirements?

1. A. Enable ip pim ssm default on RA and RB.
2. B. Add ip pim bidir-enable in global mode on RB.
3. C. Permit the source X and source Y IP addresses in the access list on RB.
4. D. Set PIM sparse mode with a static RP address of 10.20.2.1 on RA and RC.

Correct Answer: B