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  • Packet switching is a method of data transmission. Data is broken into packets of data of manageable sizes. They are sent independently through different routes decided by the router. They will be reordered into a correctly sequence when they reach the destination point.
  • With packet switching, there is no need to tie up a single communication line. Most problems regarding busy lines can be fixed by re=reouting packets.
  • The router chooses the route which the packet will take, it will always choose the route with the least traffic for efficiency.
  • However, packets can be lost and need to be re-sent. Packet switching is more vulnerable to errors with real time streaming such as video calls or audio calls. And there is a delay when packets are being reordered at the final destination.
  • Hopping is a method to solve the problem of packets clogging up the system if they never reach their destination. This can happen if the packets switch between routes a lot. To overcome this, each packet has a hop number to start with, every time they reach a router, their hop number will decrease by one. When the hop number reaches 0, the packet is then deleted.
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