communication and the internet Flashcards
what is network?
an arrangement of computers and other devices.
what is lan?
A network that covers a relatively small geographical area, often a single site.
what is wlan?
a local area network in which connected devices use high frequency radio waves to communicate
what is WAN?
a network that covers a large geographical area. it connects together two or more LANs and is usually under collective ownership.
what is client-server network?
a network that has at least one server to provide services to the client computers
what is peer-to-peer network?
a network that doesn’t have any centralized servers. Each computer in the network can act as client and server
what is network topology?
describes how the devices on a network are connected together.
what is internet?
a worldwide system of interconnected networks that enables information to be exchanged and shared.
what is communication media?
the means by which data is transmitted between devices on a network.
what is protocol?
a set of rules that govern how communications on a network should be formatted and what data they should include
what is eavesdrop?
having unauthorized sight of data being sent from one computer to another over a network.
what is Bandwidth?
the amount of data that can be carried on a network in a given period of time
what is checksum?
an error detection technique. A mathematical formula is applied to the data and resulting numerical value is transmitted with the data.
what is packet?
A small quantity of data being sent through a network. The packet is labelled with the sender’s source.
what is web server?
powerful computer systems that store web pages and multimedia that the pages might contain.
what is network security?
activities designed to protect a network and its data from threats such as viruses, hacker attacks, denial of service attacks, data interception and theft,and equipment failure.
what is denial of service (DOS)
An attack on a network that attempts to prevent legitimate users users from accessing its services.
