By: Katie Teixiera Tom Litherland Computer Networks Presentation Date: Wednesday April 6th 2011
Table of Contents 1. Definition of a computer network 2. History of Computer networks 3. Purpose of a Computer Network and its importance 4. Network used 5. Main types of computer networks 6. Organizational Point of View 7. Geographical Point of View 8.LAN Network 9. WAN Network 10. MAN/CAN Network
Table of Contents Cont.. 11. Computing Point of View 12. Network Hardware 13. How computer networks have changed to world (conclusion) 14. Work Cited 15. Q & A
Definition a of Computer Network Referred to as a Network, is a collection of computers and devices interconnected by communication channels that facilitate communications among users and allows users to share resources allows sharing of resources and information among interconnected devices.
History of a Computer Network Networks of communicating computers included the military radar system Semi Automatic Ground Environment (SAGE) and its relative the commercial airline reservation system Semi Automatic Business Research Environment (SABRE) Came about in the late 1950’s Although in the 1960’s the Advanced Research Projects Agency (ADRPA) started funding the design of the ADRPA in order to perfect networks for the United States Department of Defense
Purposes of a Computer Network and its Importance Computer networks were invented to that people all around the world could receive and send information through signals and connections to and from computer almost everywhere around the world So people could get signal or internet connection to view documents and surf the web (varies by person) Links many computers to the same printers scanners, monitors etc. Connects computers to the same internet connection, and enables them to share information without being concerned with it being compromised. They can be used to block websites.
Organizational Point of View Networks are divided into two
Peer-to-Peer (also called workgroups)
Based on 10 or less users and is suitable for small sized buisness organizations. Is the model of networking the resources are randomly scattered on the network with every machine acting as a server as well as a client
A centralized model of networking with resources placed on a dedicated machine called Server No user limit as such as it depends directly on your hardware resources and capacity to support users
Geographical Point of View Three types geographical
LAN Network Local Area Network Supplies networking capability to a group of computers in close proximity to each other such in an office
WAN Network A WAN network is used for a network that covers a city, or country. This type of network is usually provided by cell phone companies
MAN/CAN Network A CAN network is used to link buildings within a campus together, providing direct accessibility from each building. A MAN network, like the WAN network is used for long distance, up to 30 miles. It is also used for carrying information at higher speeds, upwards of 100 megabites per second.
Computing Point of View Networks are divided into two: Centralized networks:
completely on one dedicated machine called server for all the processing on computing and the clients or the terminals act as dumb entities. If the client requires a certain set of data, whole of the date set is transferred at the client end which also is wastage of the network bandwidth
In this model of networking only the required set of data is returned to the client while both the server and the client take part in processing or computing of the queries.
Network Hardware's Wireless networks Wide area networks
Starts from a subnet and router then connect
Is a residential local area network. It is used for communication between digital devices typically in the home
The practice of connecting with other networks through the use of gateways that provide a common method of routing info
Starts from a antenna to internet to junctions boxes thus connect to LAN to hosts
Local area networks
Is links between a building or group of adjacent buildings
How Computer Networks Have Changed The World (Conclusion) Before computer came to be, the transfer of info between calculation machines and computers was done by humans Now in 2011, computers and machines are pretty much doing our jobs and faster and efficiently As time goes by, internet technology is going to grow and grow and get better, faster and easier Before we had to plug in our internet cord to get connection, then Wi-Fi was invented and almost everywhere you can receive signal for internet Also with the new technology, we are able to send documents (and other stuff) through the internet in seconds of it being received though connections
Work Cited http://en.wikipedia.org/wiki/Computer_network#History www.google.ca/computernetworks http://wiki.answers.com/Q/The_purpose_of_a_computer_network_is_to_allow_computers_to http://compnetworking.about.com/od/basicnetworkingconcepts/a/network_types.htm http://en.kioskea.net/contents/initiation/types.php3