A.Dynamic Address NAT, the most common mapping method in video services

B.Static NAT is the simplest and easiest to implement, with each host address in the internal network permanently mapped to a legitimate address in the external network

C.Dynamic address NAT is a series of legitimate addresses defined in the external network that are mapped to the internal network using a dynamically assigned method

D.NAPT is an IP address that maps an internal address to an IP address on an external network on different ports on the

A.TCP

B.IP

C.UDP

D.Data Link Layer

A.True

B.False

A.It basically does not occupy bandwidth resources and has little impact on image quality

B.Through the group combination check, it is possible to recover the packet loss data with a certain probability, which is more effective for the general packet loss scenario

C.The latency requirements are high, and the existing network is difficult to use; Only for small packet loss scenarios; Aggravate image jitter

D.Increase redundant data, occupy a certain amount of bandwidth, and reduce video efficiency; There is no way for sudden packet loss; Introduce a certain delay

A.H.460.18/19

B.H.460

C.H.323

D.Q.931