缔约过失责任以损失为必要条件。（)A．正确B．错误

A. The router sent an IGMP version 2 query out interface Ethernet1 at multicast address 224.0.0.1.

B. Router RTA received an IGMP report version 1 from host 192.168.9.1.

C. Reverse Path Forwarding (RPF) is ena bled for 192.168.9.4.

D. Reverse Path Forwarding (RPF) is enabled for 224.0.1.40.

E. The IP multicast groups are 224.0.0.1, 224.0.1.40, and 239.255.0.1.

F. IP PIM RP mapping is static.

A.RPF的全称为Reverse Path Forwarding;

B.RPF的转发依据是报文的目的地址和单播路由表;

C.PRF的转发依据是报文的源地址和单播路由表;

D.RPF和具体的某种单播路由协议是无关的。

A.Reverse protocol forwarding

B.Reverse protocol flooding

C.Reverse path forwarding

D.Reverse path flooding

A. AS path

B. Split horizon

C. Poison reverse

D. Unicast RPF check

A. DVMRP hold-time period

B. Rendezvous point election

C. reverse path forwarding checks

D. interdomain multicast next hops

A. Sparse mode multicast uses a pull model to send multicast traffic to where it is requested

B. Dense mode multicast uses a push model to flood traffic throughout the network and then prunes the unwanted traffic

C. Dense mode multicast requires explicit join messa ges from their members

D. Sparse mode uses reverse path forwarding (RPF) to prune off redundant flows

E. The primary use of sparse mode multicast is for test labs and router performance testing

A. ip sa-validate

B. ip split-horizon

C. ip access-routes

D. ip filter-options

A. establish starting at the egress router going back to the ingress router

B. establish starting at the ingress router going downstream to the egress router

C. establish when a router learns of a new prefix

D. establish when the path correctly matches the reverse path forwarding check

A. reverse path of the RRO

B. least cost to the ingress router

C. shortest path to the egress router

D. reverse path of the path vector TLV