ZyXEL Communications ZYWALL10 - Manual (Page 252)

ZyWALL 10 Internet Security Gateway
N Glossary of Terms
Glossary of Terms
10BaseT
The 10-Mbps baseband Ethernet specification that uses two pairs of twisted-pair cabling
(Category 3 or 5): one pair for transmitting data and the other for receiving data.
ARP
Address Resolution Protocol is a protocol for mapping an Internet Protocol address (IP
address) to a physical machine address that is recognized in the local network.
Authenticity Proof that the information came from the person or location that reportedly sent it. One
example of authenticating software is through digital signatures.
Back Door A deliberately planned security breach in a program. Back doors allow special access to
a computer or program. Sometimes back doors can be exploited and allow a cracker
unauthorized access to data.
Backbone
A high-speed line or series of connections that forms a major pathway within a network.
BackOrifice BackOrifice is a remote administration tool which allows a user to control a
computer across a TCP/IP connection using a simple console or GUI application.
BackOrifice is a potentially disastrous Trojan horse since it can provide the user
unlimited access to a system.
Bandwidth
This is the capacity on a link usually measured in bits-per-second (bps).
Bit
(Binary Digit) -- A single digit number in base-2, in other words, either a 1 or a zero. The
smallest unit of computerized data.
Brute Force
Hacking A technique used to find passwords or encryption keys. Force Hacking involves trying
every possible combination of letters, numbers, etc. until the code is broken.
Byte
A set of bits that represent a single character. There are 8 bits in a Byte.
Camping Out Staying in a "safe" place once a hacker has broken into a system. The term
can be used with a physical location, electronic reference, or an entry point for future
attacks.
CDR
Call Detail Record. This is a name used by telephone companies for call related
information.
CHAP
Challenge Handshake Authentication Protocol is an alternative protocol that avoids
sending passwords over the wire by using a challenge/response technique.
Cipher Text Text that has been scrambled or encrypted so that it cannot be read without deciphering
it. See Encryption
Client
A software program that is used to contact and obtain data from a Server software
program on another computer. Each Client program is designed to work with one or
more specific kinds of Server programs, and each Server requires a specific kind of
Client. A Web Browser is a specific kind of Client.