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Packets, routers and ip addresses


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Packets, routers and ip addresses

  1. 1. Packets, routers and IP addresses The internet is made up of millions upon millions of small computer networks all brought together to form a vast “Inter- Network”. It was shortened to the much easier to say “Internet”.
  2. 2. The link between Domain names and IP addresses The link between a IP address and a domain name is that every server has a Domain name and then that server serves to other computer or desktops. Every single laptop and computer has a IP address and every code or set of numbers is unique like a licence plate.
  3. 3. Data Packets and Packet Switching Data Packets: A packet is a basic unit of communication over a digital network. A packet is also called a datagram, a segment, a block, a cell or a frame, depending on the protocol. When data has to be transmitted, it is broken down into similar structures of data, which are reassembled to the original data chunk once they reach their destination. Packet Switching: Packet-switched describes the type of network in which relatively small units of data called packets are routed through a network based on the destination address contained within each packet.
  4. 4. The Function of Routers A router is a networking device, commonly specialized hardware, that forwards data packets between computer networks. This creates an overlay internetwork, as a router is connected to two or more data lines from different networks. When a data packet comes in one of the lines, the router reads the address information in the packet to determine its ultimate destination. Then, using information in its routing table or routing policy, it directs the packet to the next network on its journey.
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