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Topic 3: Networks
| Question | Answer |
|---|---|
| 3G | System to allow Internet access using mobile phone networks. |
| 4G | System to allow Internet access using mobile phone networks. |
| Application server | Computer that stores application software for clients on a network. |
| Asynchronous | Data transfer method in which the sender and receiver are not synchronised. |
| Audit trails | Record of all changes and actions performed with a system, for security purposes. |
| Authentication server | Computer that checks usernames and passwords when a user tries to log in. |
| Authorised access | User who has permission to use a system. |
| Backbone | High speed connections that connect main Internet sites. |
| Bandwidth | Measure of a network's speed. |
| Bits per second | Unit for measuring the speed of data transfer over a network connection. |
| Blog | Web page where entries are stored chronologically, like a diary or journal. |
| Bluetooth | Short range, low bandwidth wireless technology often used for mobile phone headsets or earphones. |
| bps | Unit for measuring the speed of data transfer over a network connection. |
| Cache | Storage area for frequently used information, to speed up access. |
| Client computer | Computer on a network that uses services provided by a server. |
| Client-server | Network system that uses servers to store data centrally and client computers to access them. |
| Database server | Computer on a network that stores data for other users to access. |
| Dynamic Host Control Protocol (DHCP) | System that automatically assigns IP addresses to computers on a network. |
| Dialup | Internet access that connects using a telephone line and a MODEM. |
| Domain Name System (DNS) | System for translating domain names into IP addresses. |
| Domain names | Human readable names given to web sites, such as www.itgstextbook.com |
| Download | To transfer data from a server to a client computer. |
| DSL / cable | Common type of broadband Internet connection. |
| Email server | Computer on a network that stores email for other users to access. |
| Ethernet | Type of wired network connection commonly used on LANs. |
| Fibre optic | Types of network connection that offers extremely high speed transfers. |
| File server | Computer on a network that stores files for other users to access. |
| File Transfer Protocol (FTP) | System for transferring files over the Internet, often used for uploading web sites. |
| Firewall | Software or hardware used to control data entering and leaving a network. |
| Gateway | Computer which acts as a bridge between a local area network and the Internet. |
| Gbps | Gigabits per second. Measure of network bandwidth. |
| Hardware address | Unique address embedded in network connected devices. |
| Home network | Small local computer network used in homes. |
| Host | Computer on a network that provides services or performs work for others. |
| HTTP | HyperText Transfer Protocol. The standard protocol of the world wide web. |
| HTTPS | Secure version of HTTP which offers encrypted communication. |
| Hub | Hardware device for connecting several computers on a network. |
| Internet Protocol | Standard protocol used on many LANs and on the Internet. See TCP. |
| Internet Service Provider (ISP) | Company that provides Internet access to homes and businesses. |
| IP address | Unique address assigned to every computer on a network. |
| Kbps | Kilobits per second. Measure of network bandwidth. |
| Local Area Network (LAN) | Computer network in a small area such as an office building. |
| Log file | Chronological record of events, used for reporting purposes and audit trails. |
| Login | Process of authenticating oneself before using a computer system. |
| MAC address | Unique address embedded in network connected devices. |
| Metropolitan Area Network (MAN) | Computer network over a large area such as a city. |
| Mbps | Megabits per second. Measure of network bandwidth. |
| Microblog | Blog-like system which limited post length, such as Twitter. |
| MODEM | Device for connecting a computer to a telephone line, used in dialup connections. |
| Narrowband | Low speed network connection. |
| Network administrator | Individual responsible for maintaining and running a network. |
| Peer to peer (P2P) | Network in which all computers are equal and there are no centralised servers. |
| Personal Area Network (PAN) | Short range network between a computer and a mobile phone or similar portable device. |
| Personal firewall | Software application that controls network access to and from a single computer. |
| Port | Number used to determine the type of service required when a computer connects to another. |
| Print server | Computer on a network that receives and processes print requests. |
| Protocols | A standard set of rules for performing tasks, such as communication. |
| Proxy server | Computer on a network which acts on behalf of another, or through which all Internet data must pass. |
| Push technology | System which notifies users of changes to web pages without them having to visit the page. |
| Read / write web | Refers to web pages which allow user interaction and collaboration. |
| Remote access | Ability to connect to a computer, over a network, as though you were physically present at the keyboard. |
| Router | Hardware device used to connect two separate networks. |
| RSS | Really Simple Syndicate. A push technology. |
| Storage Area Network (SAN) | Network dedicated to providing disk storage to other computers on the network. |
| Server | Computer on a network that provides services or performs work for others. |
| Social bookmarking | Web site that lets users store and manage their favourite links, and share them with others. |
| Social network | Web site that lets users create personal profile pages and share them with friends. |
| Switch | Hardware device for connecting several computers on a network. |
| Synchronous | Data transfer method in which the sender and receiver are synchronised, allowing higher speed transfer. |
| Tagging | Adding key words to an item such as a photo to describe its content. |
| TCP/IP | Transfer Control Protocol / Internet Protocol. Common protocol for LANs and the Internet. |
| Thin client | Networking system whereby client computers rely on servers to perform their processing tasks. |
| Top-level domain | Suffix at the end of a URL, such as .com or .org. |
| Upload | To transfer data from a client to a server computer. |
| URL | Universal Resource Locator. Describes the location of an item, such as a web page, on the Internet. |
| Virtual LAN | Network form by several LANs which are in separate geographical locations. |
| Virtual Private Network (VPN) | Allows a secure private connection over a public network, using an encrypted 'tunnel'. For example, a remote computer can securely connect to a LAN, as though it were physically connected. |
| VLAN | Network form by several LANs which are in separate geographical locations. |
| Wide Area Network (WAN) | Computer network over a large area, such as a country or several countries. |
| Web 2.0 | Refers to web pages which allow user interaction and collaboration. |
| Web 3.0 | Proposed evolution of the world wide web. |
| Web server | Computer on a network that stores web pages. |
| WiFi | Most common type of wireless connection. |
| Wiki | Type of web page that any visitor can edit. |
| Wireless hotspot | The area around a WiFi router where wireless access is available. |
| WLAN | Wireless LAN. A LAN is what allows WiFi connections. |
| WWW (World Wide Web) | a series of interlinked multimedia pages stored on the Internet. |
Created by:
Swati0101