A.87.99.12.159

B.192.11.25.87

C.95.11.22.93

D.17.23.119.63

A.The VPLS performs MAC learning on MAC addresses seen from SAPs and SDPs.

B.When a VPLS receives a frame with an unknown MAC destination, the frame will be dropped.

C.MAC addresses are maintained in a MAC address forwarding database (FDB).

D.A VPLS emulates a virtual switch or bridge.

A.STM-1 with a bit rate of 1.544 Mbit/s.

B.STM-1 with a bit rate of 2.048 Mbit/s.

C.STM-1 with a bit rate of 155.52 Mbit/s.

D.STM-1 with a bit rate of 51.84 Mbit/s.

A.Internet devices on the same network can have the same Layer 3 address in different broadcast domains.

B.Every Host device must have a unique Layer 3 address in order to access the Internet.

C.Internet devices need unique Layer 3 addresses to communicate directly with upper layers.

D.A router must have only one address to allow it to be uniquely identified.

A.STS-1 with a bit rate of 155.52 Mbit/s

B.STS-1 with a bit rate of 51.84 Mbit/s

C.STS-1 with a bit rate of 1.544 Mbit/s

D.STS-1 with a bit rate of 2.048 Mbit/s