Section 5
Glossary
5-8
WN825
PING
A network utility that tests host reachability by sending a small
packet to the host and waiting for a reply. If you PING a computer
IP address and receive a reply, you know the computer is
reachable over the network. It also stands for “Packet Internet
Groper.”
Port Triggering
A mechanism that allows incoming communication with specified
applications.
PPP
Point-to-Point Protocol is used to transport other protocols,
typically for simple links over serial lines. It is most commonly
used to access the Internet with a dial-up modem.
PPPoE
Point-to-Point Protocol over Ethernet. Used by many DSL
Internet Service Providers for broadband connection.
PPTP
Point-to-Point Tunneling Protocol encapsulates other protocols. It
is a new technology to create VPNs developed jointly by several
vendors.
Private IP Address
An IP address assigned to a computer on the LAN by the DHCP
server for a specified lease time. Private IP addresses are
invisible to devices on the Internet. See also
Public IP Address
.
Protocol
A formal set of rules and conventions for exchanging data.
Different computer types (for example PC, UNIX
®
, or mainframe)
can communicate if they support common protocols.
Public IP Address
The IP address assigned by the service provider. A public IP
address is visible to devices on the Internet. See also
Private IP
Address
.
R
RJ-11
The most common type of connector for household or office
phones.
RJ-45
An 8-pin modular connector; the most common connector type for
10Base-T or 100Base-T Ethernet networks.
