A.DLCI 17 describes the ISDN circuit between R2 and R3.
B.DLCI17 describes a PVC on R2.It cannot be used on R3 or R1.
C.DLCI17 is the Layer 2 address used by R2 to describe a PVC to R3.
D.DLCI17 describes the dial-up circuit from R2 and R3 to the service provider.

A.show session
B.show cdp neighbors
C.show users
D.show queue

A.RIP requires less time to converge
B.RIP uses less bandwidth
C.RIP is less complex to configure
D.RIP demands fewer router resources
E.RIP has a more accurate metric

A.transport type all
B.transport output all
C.transport preferred all
D.transport input all

A.131.1.123.30
B.131.1.123.31
C.131.1.123.32
D.131.1.123.33

A.The switch will not forward unicast frames.
B.The switch will forward the frame to a specific port.
C.The switch will return a copy of the frame out the source port.
D.The switch will remove the destination MAC from the switch table.
E.The switch will forward the frame to all ports except the port on which it was received.

A.802.1d
B.VTP
C.802.1q
D.STP
E.SAP

A.an OSPF update for network 192.168.0.0/16
B.a static router to network 192.168.10.0/24
C.a static router to network 192.168.10.0/24 with a local serial interface configured as the next hop
D.a RIP update for network 192.168.10.0/24
E.a directly connected interface with an address of 192.168.10.254/24
F.a default route with a next hop address of 192.168.10.1

A.VTP
B.802.1q
C.IGP
D.ISL
E.802.3u

A.The command establishes a static route.
B.The command invokes a dynamic routing protocol for 192.168.12.0.
C.Traffic for network 192.168.12.0 is forwarded to 172.16.12.1.
D.Traffic for all networks is forwarded to 172.16.12.1.
E.This route is automatically propagated throughout the entire network.
F.Trafficfor network 172.16.12.0 is forwarded to the 192.168.12.0 network.