network A group of computers that are connected together, allowing
them to communicate with each other and share resources,
such as software, les, etc. A network can be small, such as a
LAN, or very large, such as the Internet.
network mask A network mask is a sequence of bits applied to an IP ad-
dress to select the network ID while ignoring the host ID. Bits
set to 1 mean “select this bit” while bits set to 0 mean “ignore
this bit.” For example, if the network mask 255.255.255.0
is applied to the IP address 100.10.50.1, the network ID is
100.10.50, and the host ID is 1. Seebinary,IPaddress,sub-
net.
NIC Network Interface Card
An adapter card that plugs into your computer and provides
the physical interface to your network cabling. For Ethernet
NICs this is typically an RJ-45 connector. SeeEthernet,RJ-
45.
packet Data transmitted on a network consists of units called pack-
ets. Each packet contains a payload (the data), plus overhead
information such as where it came from (source address) and
where it should go (destination address).
ping Packet Internet (or Inter-Network) Groper
A program used to verify whether the host associated with an
IP address is online. It can also be used to reveal the IP ad-
dress for a given domain name.
port A physical access point to a device such as a computer or
Router, through which data ows into and out of the device.
PPP Point-to-Point Protocol
A protocol for serial data transmission that is used to carry IP
(and other protocol) data between your ISP and your com-
puter. The WAN interface on the Wireless ADSL2+ Router
uses two forms of PPP called PPPoA and PPPoE. SeePP-
PoA,PPPoE.
PPPoA Point-to-Point Protocol over ATM
One of the two types of PPP interfaces you can dene for a
Virtual Circuit (VC), the other type being PPPoE. You can de-
ne only one PPPoA interface per VC.
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