Networking Flashcards
Cascading style sheet
A sheet separated from the HTML document used to define the look and feel of websites
CSS allows multiple pages to have the same style formatting
Compression
The reduction of the size of a file by applying algorithms to store repeated data
Client
A program or computer that makes a request of the server and receives the data
Client-server relationship
The relationship between client and server
The paradigm model of modern network computing
CSS
Cascading style sheet
Data packet
A small collection of broken down data, sent across a network, that finds the quickest route to its destination and is then reassembled at the other side
Declaration blocks
Rules within a style sheet that define the values to be applied e.g. Colour and size
DHTML
Dynamic hypertext markup language
Dynamic hypertext markup language
A form of HTML used for animated and interactive websites with content that can be automatically refreshed or streamed
Dial-up
A type of modem
Accesses internet via public telephone network
Relatively low speeds compared to broadband
DNS
Domain name server
Domain name server
A protocol that returns IP addresses for website addresses and domain names searched by a client
Domain name
A unique name on the internet that represents an organisation or website
Dynamic IP
A temporary IP address that is assigned each time a device connects with the Internet
Extendible markup language
A standard for describing data type that uses similar tag structure as HTML
XML is tidier and runs more efficiently on smaller devices such as mobile phones
GIF
Graphics interchange format
Broadband
Type of modem
Offers high-speed transmission of large amounts of data along a single cable
Graphics interchange format
A lossless bitmap format suitable for images with a limited number of colours, such as logos
HTML
Hypertext markup language
HTML elements
The words within HTML tags
E.g. Title is element in
HTTP
Hypertext transfer protocol
Hypertext markup language
The language in which websites are written, using tags and elements
It provides a universal format that describes design and layout and enables browsers to interpret and display content
Hypertext transfer protocol
A data transfer protocol that defines how data is formatted and transmitted between websites and computers
Internet
The worlds largest WAN
Consists of huge collection of computer networks
Enables people all over the world to send and receive data electronically
Internet protocol
A set of rules that enable computers to send and receive data from a server
Internet service provider
A company that provides Internet access, usually at monthly rates
IP
Internet protocol
IP address
Unique address assigned to a device that distinguishes it from others and enables it to communicate with other devices via the Internet
ISL
Internet service provider
Joint photographic experts group
A file type that uses lossy compression to store bitmap images
JPG or JPEG
Joint photographic experts group
Lossless compression
Compression method that ensures the restored file will be exactly the same as the original
No loss of data
Won’t be as small as lossy, but better quality
Lossy compression
Compression method that gives very small compressed files but loses some data because of it
Restored file is missing something of the original
Markup language
Language or code used to label and define content so it can be styled and displayed on Internet
Modem
Device that provides access to the Internet by connecting to an ISP
2 main types:
Dial-up
Broadband
MP3
Moving picture expert group audio layer 3
MPEG
Moving pictures expert group
Moving pictures expert group audio layer 3
The standard format for saving audio files
It uses lossy compression to reduce file sizes to a tenth of the original by removing sound outside the range of normal hearing
Moving pictures expert group
A set of standards that encode audio and visual information using lossy compression
Portable document format
Portable document format
An open standard for exchanging documents that allows text and images to be displayed accurately without running the software in which they were created
Router
A device that enables multiple computers and devices to connect to the same network
Routers can control priorities and rules such as connections and traffic
Selectors
A rule within a style sheet that declares where to apply the style
Server
A computer or program that ‘serves’ data to a client once it has been requested
E.g. Web server
Static IP
An IP address that applies permanently to devices or networks
Tags
The basic formatting labels used in Java and HTML to tell the browser what should be displayed on the web page
There are opening tags and closing tabs
Uniform resource locator
A unique address for every document, video, photograph, web page and so on, that aids opinion the location of data on the web page
URL
Uniform resource locator
WAN
Wide area network
Wide area network
A network that covers a large geographical area and connects different buildings, sites, even countries
The Internet is an example of a global. WAN
2 or more LANs make a WAN
W3C
World Wide Web Consortium
World wide we’d consortium
An international standards organisation for the World Wide Web responsible for standardising HTML and promoting best practice
XML
Extensible markup language
