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NAT (Network Address Translation)

NAT is a feature associated with firewall commands such as iptables, which connects computers inside your LAN to the Internet while disguising their true IP addresses. NAT modifies IP packet headers. The process is reversed for return messages. Closely related to masquerading.


The netstat command can display connectivity information for your network cards. For example, the netstat -r command is used to display the routing tables as stored in your kernel.

Network Time Protocol (NTP)

The Network Time Protocol allows you to synchronize your computer with a central timeserver. You can do this on RHEL 3 with the Date/Time Configuration tool.

NFS (Network File System)

NFS is a file-sharing protocol originally developed by Sun Microsystems; it is the networked filesystem most commonly used for networks of Linux and Unix computers.

NIC (Network Interface Card)

A NIC connects your computer to a network. A NIC can be anything from a Gigabit Ethernet adapter to a telephone modem.

NIS (Network Information System)

NIS allows you to share one centrally managed authorization database for the Linux and Unix systems on your network.

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RCHE Red Hat Certified Engineer Linux Study Guide[c] Exam (Rh302)
RCHE Red Hat Certified Engineer Linux Study Guide[c] Exam (Rh302)
ISBN: 71765654
Year: 2003
Pages: 194

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