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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
Generally 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 does not forward any packets between the interfaces.
- Router
A router is a node with two or more network (physical or virtual) interfaces, capable of forwarding packets between the interfaces.
- Tunnel
A tunnel is typically a point-to-point connection over which packets are exchanged which carry the 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 character "¬" is used for signaling that this code line is wrapped for better viewing in PDF and PS files.
1.7.2.2. Placeholders
In generic examples you will sometimes find the following:
<myipaddress>
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For real use on your system command line or in scripts this has to be replaced with relevant content (removing the < and > of course), the result would be e.g.
1.2.3.4
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1.7.2.3. Commands in the shell
Commands executable as non-root user begin with $, e.g.
$ whoami
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Commands executable as root user begin with #, e.g.
# whoami
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