A.DIS uses multicast address 0180x200:0015 to communicate with other routers on the broadcast network.

B.L1 and L2 routers elect separate DIS's.

C.In broadcast multi-access networks, such as Ethernet, a single router is elected as the DIS. There is no backup DIS

D.If a new router starts up in a LAN and has a higher interface priority, the new router preempts the original DIS and becomes the DIS.

A.Route distinguishes are used to determine which routes a VPRN should import.

B.A route distinguisher combined with an IPv4 prefix produces a VPN-IPv4 prefix.

C.CE routers use a route distinguisher to indicate which VPRN they are associated to.

D.Route distinguishes are appended to IPv4 prefixes to form IPv6 prefixes.

A.The VPLS service id, on all PE routers, must match.

B.If dynamic signaling is required, the signaling on all PE routers must be set to TLDP in the configuration of the SDPs.

C.The vc-id on the mesh-sdp is automatically assigned by a PE using the service id.

D.The signaling on all PE routers will default to TLDP in the configuration of the SDPs; therefore, no configuration change is required for dynamic signaling.

E.The vc-id on the mesh-sdp must be explicitly configured.

F.The VPLS service id, on all PE routers, does not have to match.

A.R6 (10.10.10.6) has established a link protection tunnel.

B.R2 (10.10.10.2) has established a node protection tunnel.

C.R1 (10.10.10.1) has not established a node protection tunnel.

D.R4 (10.10.10.4) has established a link protection tunnel.

A.The router with the highest priority is the DR. If priorities are the same, the current DR is selected. Otherwise the DR is chosen based on the highest RID.

B.The current DR is selected, if there is one. Otherwise, the router with the highest priority is the DR. If priorities are the same, the DR is chosen based on the highest RID.

C.The current DR is selected, if there is one. Otherwise, the router with the lowest priority is the DR. If priorities are the same, the DR is chosen based on the lowest RID.

D.The router with the lowest priority is the DR. If priorities are the same, the current DR is selected. Otherwise the DR is chosen based on the lowest RID.