Troubleshooting - Interlogix 60-938 Installation Instructions Manual

Hide thumbs

Table of Contents

Enlarged version

be found in network devices (such as routers) that allow

multiple users to access the Internet.

Ethernet

A widespread networking scheme most commonly known as

"the hardware device that enables the LAN to work at the

office." There are now several speeds, including 10BASE-T,

with transmission speeds up to 10 Mbps, Fast Ethernet (or

100BASE-T), with transmission speeds up to 100 Mbps, and

Gigabit Ethernet, which offers the highest level of backbone

support, at 1000 Mbps (that's 1 gigabit or 1 billion bits per

second).

TCP/IP

The set of protocols that make Telnet, FTP, e-mail, and other

services possible among computers that don't belong to the

same network.

IP Address

A numeric address that is given to servers and users

connected to the Internet. For servers, it is translated into a

domain name, by a Domain Name Server (DNS). For users, it

is assigned by the Internet Service Provider (ISP) when the

user goes online. This IP address might be the same number

each time you log on (called a static IP), or it might be a newly

assigned number each time you connect, based on what's

available.

MAC Address

Short for Media Access Control address, a hardware address

that uniquely identifies each node of a network.

Port

On the Internet, "port" often refers to a number that is shown in

a URL, following a colon right after the domain name. Every

service on an Internet server "listens" on a particular port

number. Most of these services have standard port numbers.

Web servers normally listen on port 80, and the standard

Gopher port is 70. (Services can also listen on nonstandard

ports, in which case the port number must be specified in a

URL when the server is accessed.)

Proxy Server

A technique used to cache information on a Web server. It acts

as an intermediary between a Web client and a Web server.

Basically, a proxy server holds the most commonly accessed

and recently used content from the World Wide Web in order to

Ethernet Interface Installation Instructions

provide quicker downloads for users and to increase server

security. It is common for an ISP to use a proxy server,

especially if it has a slow link to the Internet. Proxy servers are

also constructs that allow direct Internet access from behind a

firewall. They open a socket on the server and allow

communication via that socket to the Internet.

For example, if your computer is inside a protected network

and you want to browse the Web using Netscape, you will

need to set up a proxy server on a firewall. The proxy server

would be configured to allow requests from your computer,

trying for port 80, to connect to port 1080 on the server; then all

of your requests would be redirected to the proper place.

Subnet Mask

A number used to identify a subnetwork so that an IP address

can be shared on a LAN.

An IP address has two components, the network address and

the host address.

For example, consider the IP address 66.201.69.207.

Assuming this is part of a Class B network, the first two

numbers (66.201) represent the Class B network address, and

the second two numbers (69.207) identify a particular host on

this network.

Definitions from www.netlingo.com; www.webopedia.com