Lightning SA MultiCom, User Manual

Page: 152 / 172

Glossary
152 Glossary User’s Manual
Domain Name Servers are the phone books of the Internet. Just as people have
trouble memorizing everyone's phone number they wish to call the same problem
exists with the Internet. Having the DNS numbers of your Internet Service
Provider allows you to move about the Internet with names like
www.lightning.ch instead of 206.201.2.233. This number will take the form of
x.x.x.x where x's are numbers between 0 and 255.
See RFC1035.
Domain
A virtual group of computers and devices that share a common administrative
purpose. For instance, the domain mynetwork.com will cover everyone's
computer in the “mynetwork” company. These computers may be in the same
LAN or be located around the world in different offices.
Aside from administratively keeping a group of computers together, using a
domain tells your router that there is network that can be reached internally, and
that it may not need to connect to the Internet to reach a computer or web address
ending in that name.
Download
To copy data (such as a file) from a remote source to a local destination. Usually
referred to as the action of the recipient when taking the data. When you copy a
file from the Internet to your computer you are downloading the data to your
computer.
Duplex
Duplex identifies the possibility that the Ethernet interface can both send and
receive data. Full-duplex means the interface can both send and receive at the
same time while half-duplex means that the data can only go in one direction at a
time.
EPROM
See Flash Memory
ESP
Encapsulated Security Payload is an IP packet that is transporting encrypted data.
This is the type of Packet that the MultiCom Firewalls use to transfer IPSec
protected data.
See RFC2406
Ethernet