network

network

1. Local area network (LAN)

   • is a computer network that connects computers in a limited area such as a home, school, computer laboratory.
   • Wireless Local area network (WLAN)
     • cheaper
     • bad signoal
   • Workstations do not necessarily need their own hard disk or CD-ROM drives which make them cheaper to buy than stand-alone PCs.
   • not for too many people

2. Wide area network (WAN)

   • cost much
   • A computer network that spans a relatively large geographical area.
   • if some one want to use your net work they have to plug in not password

3. Client/Server network

   • there is a main server of the network taking control
   • if the main device get damage, the hole network will crash

4. Peer to peer network

   • a Peer to peer network is a device to a device network

5. ring network

   • A ring network is a network topology in which each node connects to exactly two other nodes
   • is good devices are connect to eachouther
   • too many device will make it slow

6. bus network

   • A bus network is a network ontology which nodes are connected in a daisy chain by a linear sequence of buses
   • faster
   • The bus can only transmit data in one direction, and if any network segment is severed, all network transmission ceases.

7. Star network

   • data transfer from one device to the main server and get send to the target by the main device
   • every thing is in control by the main device
   • the main device gets too slow

8. Stand-alone computer

   • is a computer doing every thing at it self

9. Node

   • a node is either a connection point, a redistribution point or a communication endpoint

10. Extranet

    • An extranet is a computer network that allows controlled access from the outside, for specific business or educational purposes.

11. Intranet

    • An intranet is a computer network that uses Internet Protocol technology to share information, operational systems, or computing services within an organization.

12. work

    • Archive
      • Remove a group of data from network and store in another place
    • acceptable use
      • is a set of roules for the people using the network
    • disaster recovery
      • in the event of system failing there needs to be plans in place to get the network back on and run quicker is pussible, and try to not lose any files and backing up in different places
    • failover
      • if the power gets cut, the power back up will keep the network running
    • backup
      • copy the hole data files on the network and stored if any thing happens it will get put back in the network
    • policies
      • is a principle or protocol to guide decisions and achieve rational outcomes
    • integrity
      • is a concept of consistency of actions, values, methods, measures, principles, expectations, and outcomes. Barbara Killinger offers a traditional definition
    • passwords
      • there is needed for protect data on a network. network administrators in a business may ask you to change password in an amount of time.
    • Access levels
      • Different level login you can see different files. eg student, teacher like administrator can see, change all the files on a network but limited user can’t. put user in to two different level of access a lower account can’t see the hyer level file.