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CIS 310 CH 6
CIS 310 CH 6
60
Other
Undergraduate 2
01/13/2010

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Cards

Term
Access Control List (ACL)
Definition
A list that encodes the rules stating which packets are to be allowed through a firewall and which are to be prohibited.
Term
Access Device
Definition
A device that connects network sites.
Term
Acccess Point
Definition
A point in a wireless network that facilitates communication among wireless devices and serves as a point of interconncection between wireless and wired networks.
Term
Analog Signal
Definition
A wavy signal.
Term
Asymmetric Digital Subscriber Line (ADSL)
Definition
DSL lines that have different upload and download speeds.
Term
Asymmetric Encryption
Definition
An encryption method whereby different keys are used to encode and to decode the message.
Term
Asynchronous Transfer Mode (ATM)
Definition
A prtotocol that divided data into uniformly sized cells, eliminated the need for protocol conversion, and can process speeds from 1 to 156 Mbps.
Term
Availability
Definition
In measuring computer performance, the frequency and length of service outages.
Term
Broadband
Definition
Internet communication lines that have speeds in excess of 256 kbps.
Term
Cable Modem
Definition
A type of modem that provides high-speed data transmission using cable television lines.
Term
Dial-up Modem
Definition
A modem that performs the conversion between analog and digital in such a way that the signal can be carried on a regular telephone line.
Term
DSL (Digital Subscriber line) Modem
Definition
A type of modem that does not interfere with voice telephone service and is always connected.
Term
Encryption
Definition
The process of transforming clear text into coded, unintelligble text for secure storage or communication.
Term
Encryption Algorithms
Definition
Algorithms used to transform clear text into coded, unintelligible text for secure storage or communication.
Term
Ethernet
Definition
Another name for the IEEE 802.3 protocol. It operates on Layers 1 and 2 of the TCP/IP-OSI architecture.
Term
Firewall
Definition
A computing device located between a firm's internal and external networks that prevents unauthorized access to or from the internal network.
Term
Frame Relay
Definition
A protocol that can process traffic in the range of 56 kbps to 40 Mbps by packaging data into frames.
Term
HTTPS
Definition
Term
IEEE 802.3 Protocol
Definition
This standard, also called the Ethernet, is a network protocol that works on Layers 1 and 2 of the TCP/IP-OSI architecture.
Term
IEEE 802.11 Protocol
Definition
A wireless communications standard, widel used today, that enables acess within a few hundred feet.
Term
IEEE 802.16 Protocol
Definition
An emerging wireless communciations standard, also know as WiMax, that enables broadband wireless access for fixed, nomadic, and portable applications.
Term
Internal Firewall
Definition
A firewall that sits inside the organizational network.
Term
the Internet
Definition
The public network of networks.
Term
internet
Definition
A private network of networks.
Term
Internet Service Provider (ISP)
Definition
It provides users with Internet access, by passing communications back and forth between user and the Internet.
Term
Key
Definition
A number used to encrypt data.
Term
Latency
Definition
In measuring computer performance, the transmission delay that occurs due to network congetstion during busy periods.
Term
Local Area Network (LAN)
Definition
A network that connects computers that reside in a single geographic location on the premises of the company that operates the LAN.
Term
Loss Rate
Definition
In measuring computer performance, the frequency of problems in the communications network that necessitate data retransmission.
Term
MAC (Mediat Access Control) Address
Definition
A permanent address fiven to each network interface card at the factory.
Term
Modem
Definition
Converts the computer's digital data into signals that can be transmitted over telephone or cable lines.
Term
Narrowband
Definition
Internet communication lines that have transmission speeds of 56 kbps or less.
Term
Network
Definition
A collection of computers that communicate with one another over transmission lines.
Term
Network Interface Card (NIC)
Definition
A hardware component on each devide on a network that connects teh device's circuitry to the communications line.
Term
Network of Leased Lines
Definition
A WAN connection alternative, where lines are leased from telecommunications companies and connected into a network.
Term
Onboard NIC
Definition
A built-in network interface card.
Term
Optical Fiber Cable
Definition
A cable made of glass that uses light rays to convert from analog to digital.
Term
Packet- Filtering Firewall
Definition
A firewall that examines each packet and determines whether to let the packet to pass.
Term
Performance Guarantee
Definition
Commitments to certain levels of service quality, made by vendors of communications equipment and services to their customers.
Term
Perimeter Firewall
Definition
A firewall that sits outside the organizational network.
Term
Point-to-Point Protocol (PPP)
Definition
A Layer 2 protocol used for networks that involve just two computers.
Term
Point of Presence (POP)
Definition
The location at which a line connects a PSDN network.
Term
Problem of the Last Mile
Definition
The difficulty involved in getting the capacity of fast optimal=fiber transmission lines from the street in front of buildings into the homes ans smaller businessess located in those buildings.
Term
Protocol
Definition
A standardized means for corrdinating an activity between two or more entities.
Term
Public key
Definition
Encodes messages.
Term
Private Key
Definition
Decodes messages.
Term
Public Switched Data Network (PSDN)
Definition
A network of computers and leased lines is developed and maintained by a vendor that leases time on the network to other organizations.
Term
Router
Definition
A specail-purpose computer that moves network traffic from one node on a network to another.
Term
Secure Socket Layer (SSL)
Definition
A protocol that uses both asymmetric and symmetric encryption.
Term
Switch
Definition
A special-purpose computer that receives and transmits data across a network.
Term
Symmetric Encryption
Definition
The same key is used to encode and decode the message.
Term
Symmetrical Digital Subscriber Line (SDSL)
Definition
DSL lines that have the same upload and download speeds.
Term
Transparency
Definition
The degree to which the user is unaware of the underlying communications system.
Term
Transport Layer Security (TLS)
Definition
A protocol that works between Level 4 (transport) and Level 5 (application) of the TCP/IP-OSI architecture.
Term
Tunnel
Definition
A virtual, private pathway over a public or shared network from the VPN client to the VPN server.
Term
Unshielded Twisted Pair (UTP) Cable
Definition
A UTP cable that has four pairs of twisted wire that is used to connect devices on a LAN network.
Term
Virtual Private Network (VPN)
Definition
A WAN connection alternative that uses the Internet or a private internet to create the appearance of private point-to-point connections.
Term
Wide Area Network (WAN)
Definition
A network that connects computers located at different geographic locations.
Term
WiMax
Definition
Designed to deliver the "last mile" of broadband and could potentially replace cable and DSL.
Term
Wireless NIC (WNIC)
Definition
Devices that enable wireless networks by communication with wireless access points.
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