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Unit 1 The Online World. Packets Switching

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As college students embark on their academic journey, delving into the realm of computer networking and telecommunications becomes an integral part of their education, with packet switching emerging as a fundamental concept. Packet switching, a cornerstone of modern communication systems, refers to...

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  • February 15, 2024
  • 3
  • 2023/2024
  • Lecture notes
  • Jj
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Packet Switching


 How packet switching works.
 The contents of a Packet in Packet Switching.
 The benefits of Packet Switching.




- Packet is a unit of data that can be transferred at one time.
- Packet switching is a data exchange process in which data is broken
into small-sized pieces called packets for fast and efficient
transmission. A DATA EXCHANGE PROCESS.




A process of routing information from a sender to a receiver.

All communication over the Internet is carried using packets.



How packet switching works




1. SPLITING Packet switching breaks data into small pieces called packets.
2. EACH OF THE PACKETS SENT INDEPENDENTLY – Over the network via whatever route is
fastest for each packet. This is why we have a router.

These are typically routed from the source to the destination using network switches
and routers.
3. REASSEMBLED – Packets are then reassembled into the original data at the receiver’s
end.


Each packet is sent with a ‘reader address’ which tells it where its final destination is, so it
knows where to go.

The header address also describes the sequence for reassembly at the destination computer
so that the packets are put back into the correct order.


Content of a Packet

Every packet is split into 3 main parts:

1. Header
2. Payload
3. Trailer




Tuesday 5th December 2023

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