Monday, November 7, 2011

Network Computing



This time I'll post what I have wrote in my own notes in the lecture


social capital : is like wasta , you can do so many thing by it and you'r life will be easier.


Network: connection between people.


computing devices: process, storage, connect
...
Network Types:


         LAN:
               -line File Server: it is the biggest and the most important
                                     :it helps us for :connecting , share resources
              -Nodes:They are small computers
              -Wired and Wireless Communication
             -Expansion card :is a card that can be connected to the mother board, so you have the ability to          special apps or services.
             -Software: which control all network activity
...
...
Topology:
       -Bus
      -Star
      -Ring
.
network topology


press Topology for more information


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Gateway: connect dissimilar networks
Bridge:connect similar networks
Router: routs messages through several connected LANs or to a wide area network




-
WAN: contain from many local area networks (LANs)
VAN:use something else infrastructure by leasing for your use
-
Backbone network: is the most important part which connect all parts




-
Internet: international network , and it is  owned by no one  in the whole world.
Intranet: inside one national and no one can access unless you belong to that company or organisation
Exrtenet: is a connection of intranet
-
Virtual Private Network: is a network that uses primarily public telecommunication infrastructure, such as the Internet, to provide remote offices or traveling users access to a central organizational network.



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Darknets: a network that is a accessible by specific people
                -not for public
                -for specific people
               -high security


Operating of the Internet:
IP: the set of rules used to send and receive packets from one machine to another over the Internet .
TCP: Transmission Control Protocol
...


World Wide Web: is a part of the Internet
-we can enter the Internet by different browser


- Home page: is the first page in the site


-every Domain is URL but not every URL is domain


-Webmaster: is the responsible to look after a web site