commmunicaton and internet Flashcards
What is local area network(LAN)?
A network that covers a relatively small geographical area, often a single site.
what is wireless local area network (WLAN)?
A local area network in which connected devices use high frequency radio waves to communicate.
What is wide area network(WAN)?
A network that covers a large geographical area. It connects together two or more LANs and is usually under collective ownership. The largest wide area network is the internet.
What is Client-server network?
a network that has at least one server to provide services to the client computers.
define peer to peer network?
a network that doesn’t have any centralised servers. Each computer in the network can act as client and server.
what is network Network topology
describes how devices on a network are connected together.
what is internet
a world wide 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 network should be formatted and what data they should include.
what is eavesdrop
having unauthorised 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.
what is packet?
a small quantity of data being sent through a network.
what is web server?
powerful computer systems that store web pages and the 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 that attemps to prevent legitimate users from accessing its services
what is access control?
this determines which users have access to which data, and what they are allowed to do with it.
define hacking
the act of gaining unauthorised access to a computer system and the data it contains.
what is physical security?
controlling access to critical parts of a network using physical methods(such as locked doors) rather than software.
what is malware?
short for ‘malicious software’.it is used as a generic term for any kind of software that is designed to disrupt the use of a computer system.
what is USB?
Universal Serial Bus sockets found on most modern computer systems
what is cyberattack?
any kind of malicous attack on a network connected device.
