A.Symmetric encryption algorithm

B.Asymmetric encryption algorithm

A.True

B.False

A.NAT-Server

B.Source NAT

C.NAT ALG

D.Two-way NAT

A.For some non-TCP. UDP protocols (such as ICMP. PPTP), unable to do the NAT translation

B.NAT technology can effectively hide the hosts of the LAN. it is an effective network security protection technology

C.Address Translation can follow the needs of users, providing FTP. WWW, Telnet and other services outside the LAN

D.Some application layer protocols earn/ IP address information in the data, but also modify the P address information in the data of the upper layer when they are as NAT

A.Network firewall

B.Software firewall

C.Hardware firewall

D.Stand-alone firewall