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Week 10
n/a
35
Computer Science
Undergraduate 1
08/17/2015

Additional Computer Science Flashcards

 


 

Cards

Term
authentication
Definition
method of verifyijng a person's identity & protect systems from unauthorized access
Term
biometrics
Definition
use of biological information such as fingerprint, retina scans, etc for authenticating user
Term
proxy server
Definition
computer system or application that acts as an intermediary for requests from clients seeking resources from other servers
Term
AES
Definition
Advanced Encryption Standard = a specification established by the US National Institute of Standards and Technology (NIST) 2001
Term
backups
Definition
copies of data and files for redundancy in case of need for disaster recovery
Term
ethics
Definition
rules we use to determine right and wrong things to do in our lives.
Term
law
Definition
an external rule that, if violated, is punishable by society
Term
network
Definition
2 or more computers connected to share information
Term
broadband
Definition
communications medium capable of carrying a large amount of data at fast speeds
Term
narrowband
Definition
communications medium capable of carrying a small amount of data at slower speeds
Term
modem
Definition
modulator - demodulator = I/O device used to converts digital to analog for transmitting and converts analog to digital when receiving
Term
wired network media
Definition
copper = twisted pair, coaxial; fiber optic cable
Term
wireless network media
Definition
infrared, laser, require Direct Line of Sight versus radio frequency (WIFI) and Bluetooth and cellular
Term
peer-to-peer
Definition
no boss
Term
client-server
Definition
boss
Term
PAN
Definition
personal area network
Term
LAN
Definition
local area network
Term
CAN
Definition
campus area network
Term
MAN
Definition
metropolitan area network
Term
WAN
Definition
wide area network
Term
intranet
Definition
network housed within an organization to serve internal users. Protected by firewall
Term
extranet
Definition
extension of intranet that allows specified external users including customers, partners to access internal applications and data via the Internet
Term
network topology
Definition
layout or pattern by which a network is organized
Term
bus topology
Definition
computers and resources linked in a single line of cable with two endpoints
Term
terminator
Definition
device used to absorb signals to reduce network traffic by minimizing reflections at the end of a network cable. Review Fault Tolerance concerns.
Term
star topology
Definition
aka: hub and spoke topology with one central hub as a switching station between multiple computers. Review Fault Tolerance concerns.
Term
ring topology
Definition
no hub but there is a "token" which must be empty to carry data from one computer to another in the ring. Review Fault Tolerance concerns.
Term
mesh topology
Definition
maximum fault tolerance
Term
concentrator
Definition
any network connections box
Term
hub
Definition
basic connection box with no intelligence so 'broadcasting' is a problem causing increased network traffic
Term
switch
Definition
connecting box withintelligence to inspect data packets as they are received, determining the source and destination device of that packet and forwarding it to the appropriate destination.
Term
repeater
Definition
an amplifier that increases the strength of the signal and then sends the amplified signals along the network path.
Term
routers
Definition
concentrator connecting different networks together to carry messages to intended destinations. Routers determine the shortest path your data can travel from computer A to computer B.

A router is an application device that has ports, which the computers and servers connect to. Routers are programmed with routing tables to determine the shortest possible path between Computer A and Computer B. A routing table contains a list of IP addresses that a router can connect to transfer data. It is sophisticated enough to determine the number of possible "hops" from one computer to another.
Term
bridge
Definition
consisting of hardware and software allowing communications between two similar networks.
Term
gateway
Definition
a single point of access to computers outside your network. Connects different kinds of networks together. Exit and Entry points.
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