Networks 1.4

Networks 1.4

1. WAN

   • Wireless-area-network

2. LAN

   • Local-area-network

3. DMS

   • Domain-name-system

4. VPN

   • Virtual-Private-Newtork

5. Advantages

   • It is easy to share documents. Different users are able to work on the same document at once. Only one internet connection is required as it can be shared between every device connected to the network. Centralised backups can be carried out automatically. Software updates / patches can be automatically pushed out by the server to ensure that all devices are up to date. Users can log in to any machine connected to the LAN as accounts are stored centrally on the server.

6. inactive content

   • Indicative Content: The amount of available bandwidth has a major impact on the performance of a network. The larger the amount of available bandwidth that is available the more data that can be transmitted in a given period of time.

7. Fibre Optics

   • · Fibre optic cables transmit data through light so do not suffer from electrical interference. · Data can be transmitted over very large distances without any loss of signal quality. · They are able to transmit data at a higher bandwidth.

8. Why Cloud Saving can be useful

   • Any user within the business will be able to load up the files on any device in any location as long as they have a data connection and the necessary permission.If they runs out of storage capacity it is easy to increase.All of the hardware and maintenance tasks will be performed by the cloud provider, they will not have a pay for specialist staff.The data will be automatically backed up.There is no large upfront cost, They will just have to pay a regular fee for the cloud services.

9. Networks 1.4

   • HUB
     • Replaced by a switch
   • Bandwith = Speed
   • WAP
     • Wireless-Access-Point
   • Internet
     • CAN physically touch
   • World Wide Web
     • Cant physically touch
   • MAC
     • Physical Hardware Adress
   • Packets
     • Used to break files up
     • Sequence number
   • Networks 1.4
     • VPN
       • VPN- is secure and untraceable
     • Every network connection has its own IP Adress
     • A website has many domain names and IP Adresses
       • E.G. Stacs.org
         • Stacs.bham.sch.uk
       • Differen IP Adress every couple of minutes
     • TCP
       • Transmission control Protocol
     • FTP
       • File Transfer Protocol
     • HTTP
       • Hypertext Transfer Protocol
     • HTML
       • Hypertext Markup Language