section 4 notes

Describe a router and its purpose?

passes information from one network to another keeping the traffic separate , does't have to go through internet , every router gets numbered, the router controls the traffic.

Describe the use of WIFI and Bluetooth in networks?

transferring data between devices without a need for physical connection , WIFI is faster then Bluetooth , Bluetooth is used by mobile devices for transferring small data

ISP = internet service provider

 Describe how to set up a small network involving access to the internet, understanding the need to set up the use of a browser, email and an ISP?

to set a network with the internet you need a ISP it will provide you with a router.

  Identify the advantages and disadvantages of using common network environments such as the internet?

good = recognisable interface, communication , transfer of files.

Bad = viruses , mal wear, hacking

Describe what is meant by the terms user id and password, stating their purpose and use?

to dived the information between peoples account into groups then aliquot access by group.

Identify a variety of methods of communication such as fax, email, and tele/video conferencing

faxes: hard copy to hard copy and legal and security risk

E - mail : send pictures , blind copy , attach files

Tele conferencing : multiple people can join and talk to you

Video conferencing : aloud you to show materials

  Define the terms Local Area Network (LAN), Wireless Local Area Network and Wide Area Network WAN

local area networks= it is a network only on one sites , A WAN is two sides are permanently linked  to create a land we need such as network , switches hubs, bridges

Describe the characteristics and purpose of common network environments, such as intranets and the internet

Intranet = web technologies being used inside your business , people are former with technologies of the websites.

Internet =  is about sharing information and advertising

 Describe other common network devices (including hubs, bridges, switches and proxy servers)

HUB = confused box

BRIDGE = is a link between two parts of a LAN

SWITCHES = merges the traffic going from a specific part to another

Discuss the problems of confidentiality and security of data, including problems surrounding common network environments?

Identify the need for encryption, authentication techniques, including the use of user identification and passwords, when using common network environments such as the internet?