Appendix F. Glossary

Below are some useful terms and their definitions as used in this guide.

Asymmetric Digital Subscriber Line. ADSL is a technology to transmit digital information at high bandwidths across existing copper phone lines. Download speeds are typically much faster than upload speeds (hence the term "asymmetric").
Domain Name
This refers to theunique name attached to your organization on the Internet. For example, "" or "". If you don't have a domain name, your ISP can help you select one, ensure it is available, and register it.
Domain Name Service. Refers to the software and protocols involved in translating domain names to IP addresses. Your server provides DNS lookup services for your local network, and your ISP typically also provides you with the IP addresses of DNS servers. These servers do not need to be configured into your server as the DNS server that is provided with your server will correctly resolve all local and Internet names.
ETRN is a command used for dialup solutions in order to retrieve e-mail temporarily stored at your ISP
Gateway IP Address
A gateway is the device on your network that forwards packets to and from the Internet. The gateway IP address is the IP address for that device.
Information Bay. A mechanism for creating intranets, extranets, shared directories and other resources
Integrated Services Digital Network. Digital modem line. Provides higher speeds than K56/V90. Single channel ISDN provides speeds of 56K to 64K. Dual channel ISDN provides speeds of 110K to 128K.
1. International Organization for Standardization. Relevant link: - ISO Home Page 2. ISO followed by a number is used to identify one of the published ISO standards. Relevant link: - ISO Standards Glossary, lists all the international standards published by ISO and provides a quick reference for looking up the topic of an ISO standard.
Internet Service Provider
Lightweight Directory Access Protocol
Point-to-Point Tunneling Protocol (see VPN)
Disk mirroring
Small Computer Systems Interface
Small and Medium Enterprise
Secure shell. A secure, encrypted way to log in to a remote machine across a network, or to copy files from a local machine to a server
Virtual Private Network (see PPTP)