Quick Reference Guide

Model FVL328 ProSafe High-Speed VPN Firewall Reference Manual Revision 2
Glossary
3
May 2004, 202-10030-02
IP Address
A four-position number uniquely defining each host on the Internet. Ranges of
addresses are assigned by Internic, an organization formed for this purpose.
Usually written in dotted-decimal notation with periods separating the bytes
(for example, 134.177.244.57).
IPSec
Internet Protocol Security. IPSec is a series of guidelines for securing private
information transmitted over public networks. IPSec is a VPN method
providing a higher level of security than PPTP.
ISP
Internet service provider.
LAN
See local area network.
LDAP
Lightweight Directory Access Protocol. A set of protocols for accessing
information directories. LDAP is based on the standards contained within the
X.500 standard, but is significantly simpler. And unlike X.500, LDAP
supports TCP/IP, which is necessary for any type of Internet access. Because
it's a simpler version of X.500, LDAP is sometimes called X.500-lite.
local area network
LAN. A communications network serving users within a limited area, such as
one floor of a building. A LAN typically connects multiple personal
computers and shared network devices such as storage and printers. Although
many technologies exist to implement a LAN, Ethernet is the most common
for connecting personal computers.
MAC address
Media Access Control address. A unique 48-bit hardware address assigned to
every Ethernet node. Usually written in the form 01:23:45:67:89:ab.
Mbps
Megabits per second.
MSB
See Most Significant Bit or Most Significant Byte.
MTU
See Maximum Transmit Unit.
Maximum Transmit
Unit
The size in bytes of the largest packet that can be sent or received.
Most Significant Bit or
Most Significant Byte
MSB. The portion of a number, address, or field that is farthest left when
written as a single number in conventional hexadecimal ordinary notation.
The part of the number having the most value.
NAT
See Network Address Translation.