Iptables is based on which of the following frameworks?

A. Netfilter

B. NetDoom

C. NetCheck

D. NetSecure

E. None of the choices.

Explanation:

ipchains is a free software based firewall running on earlier Linux. It is a rewrite of ipfwadm but is superseded by iptables in Linux 2.4 and above.

Iptables controls the packet filtering and NAT components within the Linux kernel. It is based on Netfilter, a framework which provides a set of hooks within the Linux kernel for intercepting and manipulating network packets.