User's Manual Part 2

NetBIOS
Glossary of Terms 303
used to map several internal IP
addresses to a single IP address,
thereby sharing a single IP
address assigned by the ISP
among several PCs.
Check Point FireWall-1's
Stateful Inspection Network
Address Translation (NAT)
implementation supports
hundreds of pre-defined
applications, services, and
protocols, more than any other
firewall vendor.
NetBIOS
NetBIOS is the networking
protocol used by DOS and
Windows machines.
P
Packet
A packet is the basic unit of data
that flows from one source on
the Internet to another
destination on the Internet. When
any file (e-mail message, HTML
file, GIF file etc.) is sent from
one place to another on the
Internet, the file is divided into
"chunks" of an efficient size for
routing. Each of these packets is
separately numbered and
includes the Internet address of
the destination. The individual
packets for a given file may
travel different routes through
the Internet. When they have all
arrived, they are reassembled
into the original file at the
receiving end.
PPPoE
PPPoE (Point-to-Point Protocol
over Ethernet) enables
connecting multiple computer
users on an Ethernet local area
network to a remote site or ISP,
through common customer
premises equipment (e.g.
modem).
PPTP
The Point-to-Point Tunneling
Protocol (PPTP) allows
extending a local network by
establishing private “tunnels”
over the Internet. This protocol it
is also used by some DSL
providers as an alternative for
PPPoE.
R
RJ-45
The RJ-45 is a connector for
digital transmission over
ordinary phone wire.
Router
A router is a device that
determines the next network
point to which a packet should
be forwarded toward its
destination. The router is
connected to at least two
networks.