Networks

Networks

Pats of a network
1. Cables
2. Connectors
3. Network software
4. Network interface card
What is a network?
1. A network is an interconnected collection of computers.
Types of networks
1. LAN - Local Area Network
2. WAN - Wide Area Network
What is a Typology?
1. The arrangement of computers in a network.
2. Examples
  1. Bus
    1. Pros : If one node fails the others aren't effected. Simple and easy to set up.
    2. Cons : If the cable malfunctions, the networks goes down. Cables and numbers of nodes are limited.
  2. Star
    1. Pro : If one system beaks it doesn't effect the network.
    2. Con : It is dependent of the central computer, and wiring is expensive.
  3. Ring
    1. Pros : Easy to access/transmit data, and doesn't require a server. It works better than star.
    2. Cons : One malfunctioning node can stop the whole network. It is also slower than Ethernet. Moving, adding, and changing devices can be straining.
  4. mesh
    1. Cons : If one node fails, the others all fail as well.
    2. Pros : Data can easily be shared as all nodes are interconnected to one another.
Protocols
1. TCP/IP
  1. rather than routing, checking, re-assembling and forwarding packets a tcp/ip stack is used as it is a less complex method
    1. The stack is:
      1. application layer
        transport layer
        network layer
        data link player
        physical layer
        transmits and receives bits
        prepares and corrects data to be passed to the physical layer
        provides network addressing and routing (ip addresses)
        handles data-consistency functions (error checking)
        provides application services to users and programs
2. a protocol is a set of rules and regulations that allow electronic devices to communicate physically and over a network

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	Created by Jemma Ward over 8 years ago

	Copied by Hayden Meacham almost 5 years ago