1.3.7

Peer-to-Peer Model

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Peer-to-Peer Model

In a peer-to-peer (P2P) network, each computer is directly connected together. This removes the need for a central server.

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Peers

  • Each computer on the P2P network is known as a peer.
  • Each peer can act as a client and a server depending on what task they are trying to accomplish.
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Uses of P2P networks

  • P2P networks are commonly used for:
    • File transfer.
    • Streaming video from computer to mobile or TV.
    • Wireless printing.
    • Bluetooth speakers.
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Responsibility

  • Each peer on the network is responsible for their own maintenance and making sure that they remain connected to the network.

Pros of the Peer-to-Peer Model

Some networking problems are well suited to peer-to-peer (P2P) networks, whereas others are more suited to client-server solutions. In any case study, you should weigh up the advantages and disadvantages.

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Easy setup

  • A P2P network is very easy to set up.
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Cheap

  • A P2P network is cheaper than a client-server network.
  • No expensive or dedicated hardware is needed.
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Robust

  • A P2P network has no centralised server.
  • If one peer fails, the others can still use the network.

Cons of the Peer-to-Peer Model

Some networking problems are well suited to peer-to-peer networks, whereas others are more suited to client-server solutions. In any case study, you should weigh up the advantages and disadvantages.

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No central maintenence

  • Without a central server there is no central management.
  • This means that we cannot update the software and security of the peers as easily.
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File duplication

  • Files have to be duplicated and transferred between machines.
  • This can lead to multiple versions that can become out of date.
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Peers may lose connection

  • Peers may lose connection when we are trying to access them.

Jump to other topics

1Computer Systems

1.1Systems Architecture

1.2Memory & Storage

1.3Computer Networks, Connections & Protocols

1.4Network Security

1.5Systems Software

1.6Ethical, Legal, Cultural & Environmental Concern

2Computational Thinking, Algorithms and Programming

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