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LifeGuard Networks
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Hudson, MA 01749


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Glossary IP Solutions
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Firewall Firewalls can be either hardware or software. They protect the LAN from security breaches, by allowing or disallowing network traffic based on a set of rules. Software, or application, firewalls control access to the LAN from Internet users, control LAN users' access to the Internet, and issue alerts for security breaches. A good firewall also logs all events and notifies the administrator of any problems.

FireWire A newer bus developed to make more effective use of audio and video applications. FireWire is extremely fast; the data transfer rates are more than three times that of PCI. FireWire is ideal if you want to use your PC mainly for games; its power would be wasted on general or common use, such as word processing. You can connect up to 63 devices in a chain to a FireWire bus.

Gateway Hardware or software that acts as a translator between two different networks.

Gbps Gigabits per second. Represents how much data transfers per second in gigabytes.

Gigabyte (GB) A gigabyte contains 1,073,741,824 bytes. Giga- is the prefix for one billion in the metric system. You generally see gigabytes when talking about hard-disk capacity.

Host Any computer on a network that offers service to other computers.

Host Computer Same as host; a networked computer that enables other computers connected to it to use programs, access data, and so on.

HTTP (Hypertext Transfer Protocol) The protocol that transfers documents from a Web server to your own computer. http, in lowercase form, is often the first thing you type before an internet address. HTP indicates to the Web browser the protocol needed to locate the Web address.

Hub A networking device that enables attached devices to receive data transmitted over the network. Most networks need a hub to help modify transmission signals and to extend the network past two workstations.

IEEE (Institute of Electrical and Electronic Engineers) Networking cabling and other equipment have standards that are set by the IEEE to ensure interoperability of products and services from vendor to vendor.

IGMP (Internet Group Management Protocol) One of the TCP/IP protocols. It enables IP datagrams to be broadcast to computers that belong to groups.

IANA The Internet Assigned Numbers Authority, an organization that oversees IP address, Top-level domain and Internet protocol code point allocations.

Internet An internetwork of smaller networks that spans the entire world, each smaller network contains servers that display information of various types on the Web (WWW, or World Wide Web). The Internet is a public network, available to all who have a computer with the appropriate software and a connection to the Internet.

InterNIC (Internet Network Information Center) To ensure that the IP addresses used on the internet are unique, the InterNIC must assign any address used on the Internet. InterNIC is the controlling agency for IP addresses and domain names.

Intranet A private Internet that is, a network within your home network on which you publish documents to view with your Web browser. You use these Internet tools – HTTP, HTML, TCP/IP, Web browsers, and more – to create and use the intranet. An intranet may or may not be connected to the Internet.