COMMUNICATION & THE INTERNET (Network Security (Access controls (Fire…
COMMUNICATION & THE INTERNET
Internet Message Access Protocol
Allows emails to be accessed using multiple email clients. Example: access email using email client on computer, tablet o mobile phone.
Simple Mail Transfer Protocol
Used when sending email throught internet. It details the fomrat that messages are sent in, what commands email servers should understand and how to respond.
Post Office Protocol
Used for retrieving email from an email server. Normally used to connect to email server, download any messages and then delete them from server.
Family of protocols that are used in wired LANs . They cover everything from the physical parts of network to the logical parts.
Transmission Control Protocol/Internet Protocol
A collection of protocols that works together. Works in layers (
Application, Transport, Internet, Link
) that pass information up and down protocol stack as it is processed
Wired vs Wireless
Network Data Speed
allows you to determine whether an equpment upgrade is necessary
estimate how long it takes to download a file
determine whether actual performance lives up to the prmises made by the service provider.
Calculating time needed to transmit a file
Wired connection methods involve a physical connection between the computer and the form of network
Network that covers a small geographical area such as home, a hospital or factory
Covers large geographical area across several sites of an organisation
a network that has at least one server to provide services to the client computers
a network that doesn't have any centralised servers. Each computer can act as client and server.
Denial of service
Cloud storage + security
Internet + WWW
How it works
access to internet