52 terms

Chapter 15

Access control policy
A set of rules established by an organisation that specify what types of network communication are permitted and denied.
Network technologies that generally provided data transfer speeds greater than 128K bps
Bus topology
A LAN configuration in which all nodes share a common line
Cable modem
A devices that allows computer networks communication using the cable TV hook-up in a home
Client/server model
A distributed approach in which a client makes requests of a server and the server responds
Computer network
A collection of computing devices connected so that they can communicated and share resources
Data transfer rate (bandwidth)
The speed with which data is moved from one place to another on a network
Digital subscriber line (DSL)
An Internet connection made using a digital signal on regular phone lines
Domain name
The part of a host name that specifies a specific organisation or group
Domain name server
A computer that attempts to translate a host name into an IP address.
Domain name system
A distributed system for managing host name resolution
Receiving data on your home computer from the Internet
The industry standard for local-area networks, based on a bus topology
File server
A computer dedicated to storing and managing files for a network
A gateway machine and its software that protects a network by filtering the traffic it allows.
A node that handle communication between its LAN and other networks
Host number
The part of an IP address that specifies a particular host on the network
A name made up of words separated by dots that uniquely identifies a computer on the Internet; corresponds to a particular IP address
A wide-area networks that spans the planet
Internet backbone
A set of high-speed networks carrying Internet traffic
Internet Protocol (IP)
The network protocol that deals with routing of packets through interconnected networks to the final destination
Internet service provider (ISP)
A company providing access to the Internet
The ability of software and hardware on multiple machines and from multiple vendors to communicate.
IP Address
An address made up of four numeric values separated by dots that uniquely indicates a computer on the internet
Local-area network (LAN)
A network connecting a small number of nodes in a close geographic area
Metropolitan-area network (MAN)
A network infrastructure developed for a large city
A standard for defining the format of files that are included as email attachments or on websites.
Network address
The part of an IP address that specifies a specific network
Node (host)
Any addressable device attached to a network
Open System
A system that is based on a common model of network architecture and an accompanying suite of protocols.
Open systems interconnection reference model
A seven-layer logical breakdown of network interaction to facilitate communication standards
A unit of data sent across a network
Packet switching
The approach to a network communication in which packets are individually routed to their destination, then reassembled
Phone modem
A devices that converts computer data in an analog audio signal and back again
A program used to test whether a particular network computer is active and reachable
A numeric designation corresponding to a particular high-level port.
Proprietary System
A system that uses technologies kept private by a particular commercial vendor
A set of rules that defines how data is formatted that is processed on a network
Protocol stack
Layers of protocols that build and rely on each other.
A network device that strengthens and propagates a signal along a long communication line
Ring Topology
A LAN configuration in which all nodes are connect in a closed loop
A network device that directs a packet between networks toward its final destination
Star Topology
A LAN configuration in which a central node controls all message traffic
A suite of protocols and programs that support low-level network communication
Top-level domain (TLD)
The last section of a domain name, specifying the type of organisation or its country or origin.
Trace route
A program that shows the route a packet takes across the Internet
Transmission Control Protocol (TCP)
The network protocol that breaks messages into packets, reassembles them at the destination, and takes care of errors.
Sending data from your home computer to a destination on the Internet
User Datagram Protocol (UDP)
An alternative to TCP that achieves higher transmission speeds at the cost of reliability.
Web server
A computer dedicated to responding to requests for web pages
Wide-area network (WAN)
A network connecting two or more local-area networks
A network connection made without physical wires