4A0-104 Online Practice Questions and Answers

Which of the following best describes a MAC FDB used by a VPLS service?

A. A VPLS service does not use a MAC FDB.

B. A single MAC FDB is shared by all VPLS services on a PE.

C. A separate MAC FDB is used on the PE for each VPLS service.

D. Each VPLS service uses a separate MAC FDBs for unicast and multicast traffic.

Which of the following about transport and service tunnels is FALSE?

A. Service tunnels are unidirectional.

B. Transport tunnels are unidirectional.

C. A service will use the same service label for every hop.

D. A local service requires a transport tunnel.

How many service labels must be signaled to bring up a fully-meshed VPLS among three PE routers?

A. 1

B. 3

C. 6

D. 12

Which utility on the Nokia 7750 SR can be used to investigate an MPLS path?

A. Isp-trace

B. Idp-trace

C. Sdp-ping

D. Svc-ping

E. Ping

Which of the following about the Nokia 7750 SR sdp-ping is TRUE?

A. It tests the IGP reachability of the far-end IP address of an SDP.

B. It tests that the MTU settings of a service are correct.

C. It tests in-band, uni-directional or round-trip connectivity of SDPs.

D. It tests the reachability of hosts connected to an SDP.

All services mapped to an SDP use the same transport encapsulation type (either GRE or MPLS)

A. TRUE

B. FALSE

Which of the following about transport tunnels used by services is FALSE?

A. A transport tunnel can carry many service tunnels.

B. The transport label is unchanged throughout the transport network.

C. A single network port can carry more than one transport tunnel.

D. Both MPLS and GRE transport tunnels use a service label.

Which of the following best describes how a MAC FDB is populated in a VPLS service?

A. A VPLS service does not use a MAC FDB.

B. The router reads the destination MAC address of frames passing through the service.

C. The router reads the source MAC address of frames passing through the service.

D. The router uses reverse ARP (RARP) to resolve the MAC addresses for unknown destinations.

E. The router is programmed with MAC addresses by the network administrator.

What is the minimum Ethernet physical network MTU required for a Layer 2 service on an MPLS encapsulated SDP with a service MTU of 1500?

A. 1500

B. 1508

C. 1514

D. 1522

Which tree in the CLI would you need to be in to add a QoS policy to a SAP?

A. config>router#

B. config>qos#

C. config>port#

D. config>service#