A.True

B.False

A.Configure a NAT address poolin the source NAT technology. You can configure only one IP address in the address pool.

B.Some application layer protocols carry IP address information in the data, but also to modify the data in the upper layer of the IP address information when they make NAT

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

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

A.Getting started with Linux is more difficult and requires some learning and guidance.

B.Linux is open source code, you can do what you want.

C.Windows can be compatible with most software playing most games

D.windows is open source, you can do what you want.

A.iptables -t filter -P INPUT -d 172.16.0.0/16 -p all -j ACCEPT

B.Iptables -t filter -A INPUT -s 172.16.0.0/16 -p all -j DROP

C.Iptables -t filter -P INPUT -s 172.16.0.0/16 -p all -j DROP

D.Iptables -t filter -P INPUT -s 172.1G.0.0/1G -p all -j ACCEPT

A.The encryption algorithm used by user data packets is determined by IKE SA.

B.IKE is a UDP-based application layer protocol

C.IKE SA for IPSec SA services

D.IKE SA is two-way