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Glossary G
Cryptoanalysis The act of analyzing (or breaking into) secure documents or systems that are protected with
encryption.
DCE
Data Communications Equipment is typically a modem or other type of communication
device. The DCE sits between the DTE (data terminal equipment) and a transmission circuit
such as a phone line.
Decryption The act of restoring an encrypted file to its original state.
Directional
Antennae
An antenna that concentrates transmission power into a direction thereby increasing coverage
distance at the expense of coverage angle. Directional antenna types include yagi, patch and
parabolic dish.
Direct
Sequence
Spread
Spectrum
(DSSS)
A type of spread spectrum radio transmission that spreads its signal continuously over a wide
frequency band.
DRAM Dynamic RAM that stores information in capacitors that must be refreshed periodically.
DTE
Originally, the DTE (data terminal equipment) meant a dumb terminal or printer, but today it
is a computer, or a bridge or router that interconnects local area networks.
EMI
ElectroMagnetic Interference. The interference by electromagnetic signals that can cause
reduced data integrity and increased error rates on transmission channels.
Encryption
The act of substituting numbers and characters in a file so that the file is unreadable until it is
decrypted. Encryption is usually done using a mathematical formula that determines how the
file is decrypted.
ESSID (Extended Service Set IDentification) The ESSID identifies the Service Set the station is to
connect to. Wireless clients associating to the Access Point must have the same ESSID.
Ethernet A very common method of networking computers in a LAN. There are a number of
adaptations to the IEEE 802.3 Ethernet standard, including adaptations with data rates of 10
Mbits/sec and 100 Mbits/sec over coaxial cable, twisted-pair cable and fiber-optic cable. The
latest version of Ethernet, Gigabit Ethernet, has a data rate of 1 Gbit/sec.
Events These are network activities. Some activities are direct attacks on your system, while others
might be depending on the circumstances. Therefore, any activity, regardless of severity is
called an event. An event may or may not be a direct attack on your system.
FAQ
(Frequently Asked Questions) – FAQs are documents that list and answer the most common
questions on a particular subject.
FCC The FCC (Federal Communications Commission) is in charge of allocating the
electromagnetic spectrum and thus the bandwidth of various communication systems.
Flash Memory The nonvolatile storage that can be electrically erased and reprogrammed so that data can be
stored, booted and rewritten as necessary.
Gateway A gateway is a computer system or other device that acts as a translator between two systems
that do not use the same communication protocols, data formatting structures, languages
and/or architecture.