communication and the internet Flashcards
(31 cards)
what is a Network
an arrangement of computers and other devices connected together to share resources and data
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 a Client-server network
a network that has at least one server to provide services to the client computer
what is peer to peer network
a network that dosent have any centralized servers each computer in the network can act as client and server
what is a Network topology
describes how the devices on a network are connected together
what is the 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 coaxial cable , fibre optic cab,e and microwaves are all forms of communication media
what is a 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 a Packet
a small quantity of data being sent through a network the packet is labelled with the senders address the recipients address how many packets are being transmitted and the position of this packet in the complete message
what is a Web server
powerful computer systems that store web pages and any 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 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
what is Hacking
the act of gaining unauthorized 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 rather that 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 a USB
Universal serial bus sockets found on most modern computer systems
what is Cyberattack
any kind of malicious attack on a network- connected device
what is Social engineering
any kind of attack on a computer system or network that exploits how people behave and respond to certain situations
what is Phishing
attempting to get confidential information by sending a user a message that appears to come from a trustworthy person or organisation
