Firewall
A piece of software or dedicated hardware used to prohibit access to certain port/host combinations.
ftp: File Transfer Protocol
A way of transferring files between hosts on a TCP/IP network.
Host
Any device on the internet.
Host ID
The part of the IP address that identifies the specific host on the network.
Intranet
Use of internet protocols and software within a company/organisation for its own private use.
IP
Internet Protocol – the part of TCP/IP that provides for data transfer between hosts.
IP Address
The address(es) assigned to a particular host to allow it to communicate on a TCP/IP network. They are in the
form of a dotted quad aaa.bbb.ccc.ddd where each number is between 0 and 255.
IRC: Internet Relay Chat
A way of communicating in real time with multiple people across a TCP/IP network.
ISP: Internet Service Provider
A company that provides access to the internet for its customers.
Linuxconf
A piece of software for the Linux operating system used to make administration easier. It has a built in web
server interface.
Load balancing
The process of having multiple servers host the same resources and the load shared between them, invisibly to
the end user.
Loopback IP address
The IP address 127.0.0.1 with DNS name “localhost,” used to access resources on the local computer without
using network bandwidth.
Modem
A device used to connect a computer to a telephone line, and convert the digital signals used in the computer to
the analogue ones used by a telephone system and vice versa.
Multi homed system
A device with more than one network adaptor and thus IP address. It may be possible to act as a router if the
server software allows it.
Multicast IP addresses
The IP addresses above 224.0.0.0 used for sending data to multiple hosts at once.
NAT: Network Address Translation
A piece of software in a firewall or proxy server that can translate invalid or private ranges of IP addresses to
valid ones as data packets flow through it.
Network ID
The part of the IP address that determines the maximum number of hosts which can connect to it.
and more