1.7. Used terms

1.7.1. Network related

Link

A link is a layer 2 network packet transport medium, examples are Ethernet, Token Ring, PPP, SLIP, ATM, ISDN, Frame Relay,...

Node

A node is a host or a router.

Host

Normally a single homed host on a link. Normally it has only one active network interface, e.g. Ethernet or (not and) PPP.

Dual homed host

A dual homed host is a node with two network (physical or virtual) interfaces on two different links, but do not forwarding any packets between the two connected links.

Router

A router is a node with two or more network (physical or virtual) interfaces, able to forward any packets between the interfaces.

Tunnel

A tunnel is typically a point-to-point connection on which packets are exchanged which contains data of another protocol, e.g. an IPv6-in-IPv4 tunnel.

NIC

Network Interface Card

1.7.2. Document related

1.7.2.1. Long code line wrapping signal char

The special char “¬” is used for signalling that this code line is wrapped for better viewing in PDF and PS files.

1.7.2.2. Placeholders

In generic examples you will find sometimes like

<myipaddress>
    

For real use on your system command line or in scripts this has to be replaced with related content (also removing < and >), the result would be e.g.

1.2.3.4
    

1.7.2.3. Commands in the shell

Commands executable as non-root user starts with $, e.g.

$ whoami
    

Commands executable as root user starts with #, e.g.

# whoami