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APPENDIX C: Glossary
A network mask is also a 32-bit binary pattern. It consists of consecutive leading 1's
followed by consecutive trailing 0's, like this:
11111111.11111111.11111111.00000000. Therefore, sometimes a network mask
can also be described simply as x number of leading 1's.
When both are represented side by side in their binary forms, all bits in the IP
address that correspond to 1's in the network mask become part of the IP network
address, and the remaining bits correspond to the host ID.
For example, if the IP address for a device is, in its binary form,
11011001.10110000.10010000.00000111, and if its network mask is
11111111.11111111.11110000.00000000, it means the device's network address is
11011001.10110000.10010000.00000000, and its host ID is
00000000.00000000.00000000.00000111. This is a convenient and efficient method
for routers to route IP packets to their destination.
ISP: Internet Service Provider. An ISP is a business that provides connectivity to the
Internet for individuals and other businesses or organizations.
ISP Gateway Address: The ISP Gateway Address is an IP address for the Internet
router located at the ISP's office.
LAN: Local Area Network. A LAN is a group of computers and devices connected
together in a relatively small area (such as a house or an office). Your home
network is considered a LAN.
MAC (Media Access Control) Address: A MAC address is the hardware address of a
device connected to a network. The MAC address is a unique identifier for a device
with an Ethernet interface. It consists of two parts: three bytes of data that
corresponds to the Manufacturer ID (unique for each manufacturer), plus three
bytes that are often used as the product's serial number.
NAT: Network Address Translation. This process allows all of the computers on
your home network to use one IP address. Using the Pure Networking Broadband
Router's NAT capability, you can access the Internet from any computer on your
home network without having to purchase more IP addresses from your ISP.
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