A.LAN switch will modify the data link layer header of the packet and then forward it.

B.LAN switch will modify the network layer header of the packet and then forward it.

C.LAN switch can learn Mac address automatically.

D.LAN switch operates at data link layer.

A.COMMUNITY

B.AS_PATH

C.LOCAL_PREF

D.ORIGIN

E.MED

F.NEXT_HOP

A.The two routers between which LDP session is established are called LDP Peer.

B.The UDP and TCP port number for LDP is 64.

C.In MPLS, LDP is used to implement label distribution, label control and label retention.

D.Between two LSRs that run LDP, the LDP session is established and Label/FEC mapping information is exchanged.

A.The last three bits of DSCP are set to 101.

B.Eight levels of AF in DSCP are mapped into eight levels of IP Precedence.

C.All 8 bits of TOS are set to zero.

D.The first three bits of DSCP are mapped into three bits of IP Precedence.

A.Egress LER forwards packets based on IP routing table.

B.Ingress LER forwards packets based on label.

C.Core LSR forwards packets based on label.

D.Core LSR forwards packets based on IP routing table.