Glossary - ZyXEL Communications X650 User Manual

10.3 Glossary

Default Gateway (Router): Every non-router IP device needs to configure a default
gateway's IP address. When the device sends out an IP packet and the destination is not on
the same network, the device has to send the packet to its default gateway, which will then
send it out towards the destination.
DHCP: DHCP stands for Dynamic Host Configuration Protocol. This protocol
automatically gives every computer on your home network an IP address.
DNS Server IP Address: DNS stands for Domain Name System, which allows Internet
servers to have a domain name (such as www.Broadbandrouter.com) and one or more IP
addresses (such as 192.34.45.8). A DNS server keeps a database of Internet servers and
their respective domain names and IP addresses, so that when a domain name is requested
(as in typing "Broadbandrouter.com" into your Internet browser), the user is sent to the
proper IP address. The DNS server IP address used by the computers on your home network
is the location of the DNS server your ISP has assigned to you.
DSL Modem: DSL stands for Digital Subscriber Line. A DSL modem uses your existing
phone lines to transmit data at high speeds.
Ethernet: A standard for computer networks. Ethernet networks are connected by special
cables and hubs, and move data around at up to 10/100 million bits per second (Mbps).
Idle Timeout: Idle Timeout is designed so that after there is no traffic to the Internet for a
pre-configured amount of time, the connection will automatically be disconnected.
IP Address and Network (Subnet) Mask: IP stands for Internet Protocol. An IP address
consists of a series of four numbers separated by periods that identify a single, unique
Internet computer host in an IP network. Example: 192.168.1.1. It consists of 2 portions: the
IP network address and the host identifier.
The IP address is a 32-bit binary pattern that can be represented as four cascaded decimal
numbers separated by "." Example: aaa.aaa.aaa.aaa, where each "aaa" can be anything from
000 to 255, or as four cascaded binary numbers separated by "." such as:
bbbbbbbb.bbbbbbbb.bbbbbbbb.bbbbbbbb, where each "b" can either be 0 or 1.
A network mask is also a 32-bit binary pattern, and consists of consecutive leading
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