4A0-105 Online Practice Questions and Answers

What are the limitations of a traditional layer 2 switch? (Choose 3}

A. Isolates collision domains.

B. Requires layer 2 loop prevention.

C. Slow response to topology changes.

D. Limited to 4094 vlans per switch.

E. Increased flooding.

What is the default service-mtu for a VPLS service?

A. 1500

B. 1514

C. 1518

D. It depends on the access port MTU.

E. It depends on the network port MTU.

If the command "disable-learning" has been added at the VPLS level, then MAC entries which have already been learned will not be aged.

A. TRUE

B. FALSE

Click on the exhibit below.

If the device connected to PE-A in Metro A sends a frame to PE-A that requires replication within the VPLS which devices is PE-A responsible for replicating the frame to?

A. PE-A must replicate the frame to all devices participating in the VPLS

B. PE-A must replicate the frame to all PEs within Metro A

C. PE-A must replicate the frame to all devices in the Metro A

D. All of the above

Which of the following statements regarding unicastand multicast frames is true for a traditional layer 2 switch? (Choose 2)

A. Multicast frames only forward out ports that have a known receiver.

B. Unicast frames only forward out ports that have a known receiver.

C. If the FDB is empty, unicast and multicast frames are treated equally.

D. If the FDB has an entry for the unicast frame, both unicastand multicast are treated equally.

Click on the exhibit below.

Given the following output what is the most likely reason the SDP binding is operationally down? (Choose 2)

A. The sdp id is different on the far-end.

B. LDP is disabled on the far-end.

C. The vc-id is different on the far-end.

D. The mesh-sdp is missing on the far-end.

E. The mesh-sdp is administratively shutdown on PEL

F. There is an MTU mismatch.

You are providing a customer two VPLS services in two different Metro networks. VPLS 500 has been configured in Metro 1 and VPLS 900 has been configured in Metro 2. The customer has requested that they have connectivity between the Metro Networks with their existing VPLS services. Which configuration on the PE routers linking the metro networks will allow for VPLS 500 and VPLS 900 to act as a single VPLS service? Assume default values for all VPLS parameters and SDP 999 exists between the metro networks.

A.

B. C. D.

Which of the following must be true in order to add a port to a LAG? (Choose 2)

A. ports must be on the same MDA

B. ports must have the same speed and duplex settings

C. auto negotiation must be on

D. auto negotiation must be off or limited

E. port must be in access mode only

What is PBB also known as?

A. H-VPLS

B. IEEE 802.lag

C. MAC aggregation

D. MAC-in-MAC

An MC-LAG is configured with default parameters. When a failed interface recovers, the active link reverts to the restored interface.

A. TRUE

B. FALSE