A.The VLAN improves network security. Users on different VLANs cannot communicate with each other.

B.Layer 2 forwarding is only based on destination MAC addresses, and is irrelevant to VLAN configuration.

C.The VLAN technology is a management method that controls the communication
between terminals.

D.The VLAN improves network processing efficiency. Users on different VLANs are separated from each other. Therefore, the size of a broadcast domain is reduced.

A.The routes do not need to match the specified mask length.

B.The routes are optimal in the IP routing table.

C.The routes match the specified mask length.

D.The routes are IGP routes.

A.VRRP has one kind of advertisement message which is sent by Master.

B.VRRP has two kinds of advertisement message, one is sent by Master, the other is sent by Slave.

C.VRRP has one kind of advertisement message which is sent by Slave.

D.VRRP has two kinds of advertisement message, one is used for Master election, the other one is used in stable network after Master election.

A.True

B.FALSE

A.Link ID

B.Network Mask

C.Data

D.Metric