What is TCP/IP?
Networks are able to function because computers, printers, and other devices are able to send da ta to each other,
either through cables or by usin g wireless signals. This transf er of data is made possible by sets of d ata transmission
rules called protocols. A protocol can be thought of as a language, and like a language, it has rules allowing participants
to communicate with each other.
Different types of networks use different protocols, but Transmission Control Protocol/Internet Protocol (TCP/I P) is th e
most popular. TCP/IP is used to send data over the Internet as well as over most corporate and home networks.
Because computers do not understand words and instead rely upon numbers for communication, TCP/IP requires
that every device on a network using TCP/IP to c ommunicate must have an IP address. IP addre sses are essentially
unique computer names in a numeric format, used to t ransfer data around a network . IP addresses allow TCP/IP to
confirm requests for and recei pt of data by various device s on the network.
How do I locate IP addresses?
1Click , or click Start and then clic k Run.
2In the Start Search or Run box, type cmd.
3Press Enter, or click OK.
The Command Prompt window opens.
4Type ipconfig, and then press Enter.
The IP address appears as four sets of numbers separated by periods, such as 192.168.0.100.

How to locate a printer IP address

•You can locate the printer IP add ress by viewing t he printer netwo rk setup page.
How are IP addresses assigned?
An IP address may be assign ed automatically by the networ k using DHCP. Once the printer is set up on a computer,
the computer sends all print jobs across the network to the printer using this address.
If the IP address is not automatically assigned, you will be asked during wireless setup to manually enter an address
and other network informatio n after selecting your printer from the available list.
What is a key index?
A wireless access point (wireless rout er) can be configured with as many a s four WEP keys. Only one key is used on
the network at a time, however. The keys are num bered, and the number of a key is referred to as its key index. All
devices on the wireless network must be config ured to use the same key in dex when multiple WEP keys are configured
on the wireless access point.
Select the same key index on your printer as you are usin g on your wireless access point.
Networking
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