A.1000BASE-CX
B.100BASE-FX
C.1000BASE-LX
D.1000BASE-SX
E.1000BASE-ZX

A.Erase flash.
B.Restart the switch.
C.Delete the VLAN database.
D.Erase the running configuration.
E.Erase the startup configuration.
F.Modify the configuration register.

A.Microsegmentation decreases the number of collisions on the network.
B.if a switch receives a frame for an unkown destination，it uses ARP to resolve the address.
C.Spanning Tree Protocol allows switches to automatically share vlan information.
D.In a properly functioning network with redundant switched paths，each swiched aegment will contain oneroot bridge with all its ports in the forwarding state.All other switches in that broadcast domain will haveonly one root port.
E.Establishing vlans increases the number of  broadcast domains.
F.Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3address information.

A.classful routing protocol
B.variable-length subnet masks
C.broadcast addressing
D.manual route summarization
E.uses SPF algorithm to compute path

A.ARP
B.CDP
C.DHCP
D.DNS
E.ICMP