Which underlying protocol(s) does LDP utilize to communicate with LDP Peers?

A. UDP and TCP

B. UDP only

C. LDP uses IP Protocol 646 and does not rely on UDP or TCP

D. TCP only

Which command is used to undo a change after issuing a commit command?

A. router# rollback configuration to -1

B. router(config# commit undo

C. router(config)# commit rollback

D. router# rollback configuration last 1

One of your peers show in the SHOW BGP VPNV4 UNICAST SUMMARY output What is the cause of this?

A. The label value ranges are mismatched.

B. The peer has no prefixes with a Route-Target that the local router is importing.

C. The BGP prefixes between the routers have not fully converged and will correct itself in time.

D. The peer router is not configured to use the VPNv4 address-family for this connection.

What BGP address-families are used between the ASBRs in the different AS'es in an IPv4 Option C Layer3 VPN solution?

A. VPNv4 Unicast Only

B. IPv4 Umcast and VPNv4 Unicast

C. IPv4 Labeled-Unicast only

D. IPv4 Unicast and IPv4 Labeled-Unicast

Which statements are true regarding L3VPN configurations?

A. Prior to configuring a vrf within MP-BGP, the router has to have instantiated the VPNv4 or VPNv6 address-family.

B. On a single PE router, the Route Distinguisher and the Route Targets must be the same.

C. Prior to configuring a neighbor in the VPNv4 address-family, it must already be configured for IPv4Unicast.

D. The import and export Route Targets must be the same on a PE.

What is currently required for eBGP sessions in IOS-XR that was not required in IOS?

A. Default MED values

B. Local-Preference values

C. Send Communities

D. Route-Filter In and Out

How many times are Layer 3 lookups performed on a packet transiting a CRS or ASR9k router?

A. Three times: in the ingress linecard, the fabric, and the egress linecard

B. Once: in the active RP/RSP

C. Once: in the ingress linecard

D. Twice: in the ingress linecard and again in the egress linecard

When are core dump files created by the system?

A. There are too many critical events.

B. There are too many duplicate messages.

C. The commit database is full.

D. A process fails or terminates abnormally.

What is the default MP-BGP address-family on IOS-XR?

A. IPv6 unicast

B. There is no default address-family

C. IPv4 unicast

D. VPNv4

Which VRFs must be configured on the ASBRs between the two AS'es in an Option B Layer-3 VPN solution?

A. The VRFs shared between the two AS'es plus one VRF representing each AS.

B. The VRFs shared between the two AS'es.

C. The VRFs shared between the two AS'es plus one shared VRF.

D. The VRFs do not need to be configured on the ASBRs.