PLANET XRT-501 - Manual (Page 86)

send it out towards the destination.
DHCP: 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 " www.planet.com.tw" 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
preconfigured 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 identifies a single, unique
Internet computer host in an IP network. Example: 192.168.0.1. It consists of 2 portions: the
IP network address, and the host identifier.
The IP address is a 32-bit binary pattern, which can be represented as four cascaded
decimal numbers separated by “ aaa.aaa.aaa.aaa”, where each “aaa” can be anything from
000 to 255, or as four cascaded binary numbers separated by
“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
1’s followed by consecutive trailing 0’s, such as 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
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