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
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
Troubleshooting
Registration Problems
Check the following if you have problems registering
the Ethernet Interface module:
•
Verify Option 7: Account Number is programmed correctly.
•
Verify the Account Number is not already in use.
•
Verify Option 89: Serial Port Protocol is On.
•
Verify Remote Option 5: DHCP On/Off is On if it is
available on the network.
•
If DHCP is unavailable, Remote Options 7-9 must be set
appropriately.
•
Verify Remote Option 3: Dealer ID is programmed
correctly.
•
Verify Remote Option 4: Line Number is programmed
correctly.
•
Remote Options 14 and 15 must be set appropriately if a
proxy server is used to reach the Internet.
Ethernet Interface Installation Instructions
11
