Lightning SA MultiCom, User Manual

Page: 158 / 172

Glossary
158 Glossary User’s Manual
ICMP Header
IP Protocol
A format that specifies how data is transmitted between two or more devices or
software. It is important to have devices using the same protocol such as assuring
that your network printer and network computer both use TCP/IP.
Some common protocols are TCP, UDP and ICMP.
See RFC791 and RFC2411
IPSec
IPSec is a suite protocols designed by the Internet Engineering Task Force (IETF)
to protect IP communication. Working on the network level, IPSec provides
authentication, encryption, and integrity services for data packets and streams.
This can be done either between 2 machines (transport mode) or 2 networks
(tunnel mode)
IPSec can use three protocols to provide these services: Authentication Header
(AH), Encapsulating Security Payload (ESP), Internet Key Exchange (IKE).
See RFC2401.
Kernel
This is the kernel or operating system corresponding to the release of the Linux
Operating System. Lightning-Linux is the operating system that runs the
MultiCom Firewall. Because it is a customized version of Linux, each version of
Lightning Linux will have its corresponding Linux kernel that was integrated into
the current version. This is visible in the first screen of the Monitor software.
LAN
Local Area Network is the interconnection of computers and network devices in a
relatively small group. This group can be the computers in your home or the
computers in your office building as compared to a remote network (WAN) that
you may connect to through the phone company or satellite uplinks. LAN are
typically differentiated by the media/ cabling connecting the devices, the
protocols being run over the media and the layout or topology of the media.