Networks
- Created by: FinolaPower
- Created on: 13-04-16 15:52
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- Networks
- Stand alone computers
- This refers to any computer that is not connected to any other computer via a network
- LAN ( local area network)
- These are devices located close to each other
- Can be wired or wireless
- Usually used for schools or small business
- Allows communications between workers
- Allows data to be shared
- Log on from any connected machines
- Computer network
- It is a collection of computers that are connected together to allow the sharing of imformation
- WAN (wide network)
- Computer can be located in various location
- WAN is a result of joining two or more separate LANs via satelite
- Peer-to-Peer
- Each computer has equal status
- Advantages is that it shares files and peripherals i.e. printers
- But the overall speed of the network is reduced
- Also each peer computer may be accesses by any other peer causing it to slow down
- Client server
- It is a dedicated, high-spec machines that handles the storage of data and processing of shared files
- The computers accessed by end users are called clients which request services from the server
- It is normal for organisations to have multiple servers, each having it own dedicated function
- Multiple servers can be stacked together to create a Data centre
- Servers tend to be vitalised to increase efficiency and decrease energy consumption
- Network Topology
- Ring topology
- One common linking cable
- Passes all nodes
- Fast perfromance
- One direction traffic
- Star topolgy
- Shared link to server
- Few data collision
- Fast
- Bus Topology
- One common linking cable
- cheap
- Node connected off the cable
- Slows down when heavy traffic
- Lots of data collisions
- Topology- the layout of a network
- Ring topology
- Each device is called a NODE
- Adressing
- MAC-Media access control
- Used to communicate with physical layer of network
- Can be used to restrict to a network
- unique number to idenifiy individual interface
- IP
- Each node on a network running IP has a unique IP address
- It uniquely identifies the node
- MAC-Media access control
- Stand alone computers
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