先試後買

A. oam mac-ping

B. oam mac-trace

C. oam cpe-ping

D. oam mac-populate

E. oam svc-ping

A. On the MDU the endpoint has been configured with "supress-standby-signalling"

B. On the PE the endpoint has been configured with "no supress-standby-signalling"

C. On the MDU the endpoint has been configured with "no supress-standby-signalling1

D. On the PE the endpoint has been configured with "supress-standby-signalling"

A. To allow all ports on the root switch to become alternate ports.

B. So that you know which links will be active in your network.

C. This is not a best practice. Any switch can be used as the root bridge.

D. To prevent a new switch from becoming root when added to the network.

A. The same as the number of root ports

B. 1 per segment

C. 1 per switch

D. The same as the number ofalternate ports in the topology

A. Either (a) or (b) will make this sentence true.

B. Spoke SDP

C. Neither (a) nor (b) will make this sentence true.

D. Mesh SDP

A. Slow response to topology changes.

B. Requires layer 2 loop prevention.

C. Limited to 4094 vlans per switch.

D. Isolates collision domains.

E. Increased flooding.

A. TheI-SID is set to 0 by default and is only used for interop purposes. The receiving PE uses the service label to determine the I-VPLS.

B. There is no default value. The I-SID must always be explicitly configured

C. The I-SID is set to the service-id, unless the service-id is larger than a 24 bit value. In this case the I-SID must be explicitly configured.

D. TheI-SID is always set to the service-id by default.

A. 9108 bytes

B. 9100 bytes

C. 9118 bytes

D. 9104 bytes

A. PE-1 must be configured with mesh-SDPs to every node receiving the multicast traffic. There is no way to reduce the replication or bandwidth.

B. PE nodes in Metro 1 could be configured with mesh-SDPs. PE nodes in Metro 2 would be configured with mesh-SDPs. However, the connection between Metro networks (PE-2 to PE-6) can be configured with a spoke-sdp. This would reduce the replication and bandwidth used on the link between Metro networks. This also reduces the replication required by PE-1.

C. PE nodes in Metro 1 could be configured with spoke-SDPs. PE nodes in Metro 2 would be configured with spoke-SDPs. However, the connection between Metro networks (PE-2 to PE-6) can be configured with a mesh-sdp. This would reduce the replication and bandwidth used on the link between Metro networks. This also reduces the replication required by PE-1.

D. PE-1 can be configured with spoke-SDPs to every PE node in both Metro networks. This will reduce the bandwidth and replication within the network.

A. The time to relearn thousands of MAC addresses may result in excessive flooding or loss of packets.

B. Discarding frames when the FDB limit is reached could deny SLA guarantees.

C. If the FDB reaches the limit, the router will discard frames.

D. It could take several seconds to relearn thousands of MAC addresses denying QoS/SLA guarantees.

A. Frame forwarding

B. MAC learning

C. SA filtering

D. Routing table population

A. Devices behind R2 will be associated with the sdp between R3 and R1.

B. The devices cannot communicate based on the configuration in the diagram so there will be no mac address association.

C. Devices behind R2 will be associated with the sdp between R3 and R4.

D. It depends if traffic is received via R4 or R1 from devices behind R2.

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

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

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

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

A. MUP

B. MIP

C. MEP

D. MAP