A.Double side by exchanging message header capabilit field indicates the UAC / UAS supported media type and encoding

B.to the answers are right

C.When the UA registers with the registration server, it will register its own capabilities with the server, and the caller and the called party will know the capability set of the other party by querying the server

D.Dual side by exchanging message body SDP indicated UAC / UAS supported media type and encoding

A.machine top box

B.access into the switch

C.DSLAM

D.Wide Router

E.cable modem

F.access the server

A.distal end of the PE and CE interface address connected

B.distal end PE of the loopback interface address

C.present P E of loopbac K interface address

D.distal end CE of the loopback interface address

A.make use NAT after art, outsiders can not get information on the internal network

B.make use NAT after technologies, network users access the network service availability affected

C.make use NAT technology, the internal and external networks are blocked

D.make use NAT after technical problems can be avoided when the two interconnected caused due to the internal network address

A.In the PKI domain view, configure the certificate identifier H3CCA

B.In PKI domain view, configure certificate url ca.h3c.com

C.In PKI domain view, configure the ca identifier H3CCA

D.In PKI domain view, configure certificate request url ca.h3c.com