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Rev.2 - YML630 www.netcomm.com.au
Cable/DSL Firewall Router Page 57
NAT
Short for Network Address Translation, a
routing protocol that allows global IP
Addresses to be translated into multiple
private IP Addresses for use on internal LAN
networks. The explosion in the use of the
Internet has created a critical problem for the
Internet Assigned Numbers Authority
(IANA) which is in charge of assigning IP
Addresses to Internet users, ISPs etc. NAT is
a technology that has been introduced to help
maximize the utilization of assigned IANA
and global IP Addresses.
Network Protocol
Network protocols encapsulate and forward
data packets from one interface to another.
PAP/CHAP
Short for Password Authentication Protocol
and Challenge Handshake Authentication
Protocol. Most ISPs use either one for user
identification. If your ISP doesn’t support
these two protocols, contact them for an
authentication script.
PPP
Short for Point-to-Point Protocol, a
communications protocol for transmitting
information over standard telephone lines
between devices from different manufacturers.
PPPoE
Short for PPP over Ethernet, relying on two
widely accepted standards, Ethernet and the
Point-to-Point Protocol. PPPoE is a
communications protocol for transmitting
information over the Ethernet between
devices from different manufacturers.
PPTP
The acronym of Point to Point Tunnelling
Protocol, PPTP encapsulates the packet for
transmission over the Internet. It creates a
private “tunnel” through the large public
network to have similar security of private
network without actually leasing a private
line. PPTP is normally used for VPN
connections.
Protocol
An agreed format for transmitting, sending and
receiving data between two devices.
Roaming
The ability for a wireless device to move from
one access point’s range to another without
losing the connection.
Router
An Internet device that routes requests for
information to other routers until the
information’s location is found and the data
can be transmitted back to the origin of the
request.
TCP/IP
Short for Transmission Control Protocol and
Internet Protocol, the suite of communications
protocols that enable hosts on the Internet to
connect and exchange streams of data.
VPN
The acronym for Virtual Private Network. Via
access control and encryption, VPNs bring
security to the data transmission through the
Internet as it is transmitted through a private
network. It not only takes advantage of
economies of scale but also provides a high
level of security while the packet is sent over
a large public network.
Wide Area Network (WAN)
A system of LANs being connected by
telephone lines and radio waves. Although
some WANs may be privately owned, they
are usually considered a means of public
access.
WEP
The acronym for Wired Equivalent Privacy. It
is an encryption mechanism used to protect
your wireless data communications. WEP
uses a combination of 64-bit/128-bit keys to
encrypt data that is transmitted between all
points in a wireless network to ensure data
security. It is described in the IEEE 802.11
standard.