IPUX CS101A - Manual (Page 47)

- 46 -
network appear to the Internet as a single address. For
routing messages properly within your network, each
device requires a unique IP address. But the addresses
may not be valid outside your network. NAT solves the
problem. When devices within your network request
information from the Internet, the requests are forwarded
to the Internet under the router's IP address. NAT
distributes the responses to the proper IP addresses
within your network.
Network A network consists of a collection of two or more devices,
people, or components that communicate with each
other over physical or virtual media. The most common
types of network are:
LAN – (local area network): Computers are in close
distance to one another. They are usually in the same
office space, room, or building.
WAN – (wide area network): The computers are in
different geographic locations and are connected by
telephone lines or radio waves.
NWay Protocol A network protocol that can automatically negotiate the
highest possible transmission speed between two
devices.
P
PCM PCM (Pulse Code Modulation) is a technique for
converting analog audio signals into digital form for
transmission.
PING Packet Internet Groper, a utility used to determine
whether a specific IP address is accessible. It functions
by sending a packet to the specified address and waits
for a reply. It is primarily used to troubleshoot Internet
connections.
PPPoE Point-to-Point Protocol over Ethernet. PPPoE is a
specification for connecting the users on an Ethernet to
the Internet through a common broadband medium, such
as DSL or cable modem. All the users over the Ethernet
share a common connection.