Chapter 5 - LANS & WLANS Flashcards
AES
(Advanced Encryption Standard) An encryption standard that uses three seperate keye sizes and is based on the Rijndael encryption algorithm,
Application Server
A computer on a network that is dedicated to running applications and delivering applications to client computers.
Bandwith
the data transmission capacity of a communications channel. Digital signals are measured in bits oer second, analog signals in hertz.
Bluetooth
A wireless technology used in conjuction with standard Ethernet networks that allows data transfer rates between 200 and 700 Kbps up to a maximum range of 35 feet.
Bridge
A device that connects two similar networks by simply transferring data without regard to the network format.
Broadband
A term used to refer to communications channels that have high bandwith.
Bus Topology
A network arranged on a common backbone that connects all the network devices. If the backbone fails, the network becomes unusable.
Ciphertext
An encrypted message, opposite of Plaintext.
Circuit Switching
The method used by the telephone network to temporarily connect one telephone with another for the duration of a call.
Client/Server Mode
A network where processing is split between workstations (clients) and the server.
Communications Channel
Any pathway between the sender and receiver; channel may refer to a physical medium or frequency.
Communications Protocol
A set of rules that ensures the orderly and accurate transmission and reception of data.
Cryptographic Algorithm
A specifci procedure for encrypting and decrypting data.
Cryptographic Key
A specific word, number, or phrase that must be used to encrypt or decrypt data.
CSMA/CD
(Carrier Sense Multiple Access with Collidion Detection) A method of responding to an attempt by two devices to use a data channel simultaneously. Used by Ethernet networks.
Decryption
The process of converting ciphertext into plaintext.
DHCP
(Dynamic Host Configuration Protocol) A set of rules that allow nerwork client computers to find and use the Internet address that correspond to a domain name.
Drive Mapping
A process of assigning a drive letter to a storage device located on a different network workstation.
Encryption
The process of scrambling or hiding information so that it cannot be understood with the key necessary to change it back into its original form.
Ethernet
A popular network technology in which network nodes are connect by coaxial cable or twisted-pair wire (eg. Cat-5).
Ethernet Adapter
A type of network interface card designed to support Ethernet protocols.
File Server
A network computer that is dedicated tos toring and distributing files to network clients.
Gateway
A network device that connects two dissimilar networks even if the networks use different protocols.
Handshaking
A process where a protocol helps two network devices communicate.
Homegroup
A feature of Windows 7 that quickly creates a peer-to-peer network for sharing files and printers.
HomePNA
(HPNA) A network technology that uses a building’s existing phone lines to connect nodes.
Infrared Light
A transmission technology that uses a frequency range just below the visible light spectrum to transport data.
IP Address
Unique identifying numbers assigned to each computer connected to the Internet.
LAN
(Local Area Network) An interconnected group of computers and peripherals located within a relatively limited area, such as a building or campus.
LAN Jacking
Unauthorized access to a wireless network; also called war driving.
MAC Address
(Media Access Control) A unique identifier similar to a serial number assigned to networking equipment at time of manufacture.
MAN
(Metropolitan Area Network) A public, high-speed network that can transmit voice and data with a range of 50 miles.
Mesh Topology
A network arranged in such a way that each device is connected to many other devices. Data traveling on a mesh network can take any of several possible paths.
Microwaves
Electromagnetic waves with a frequency of at least 1 gighertz; one type of channel for transmitting data over communications networks.
MiFi
A small, wireless router that connects to a cellular data network, creating a mobile WiFi hotspot.
