Networking
ELI5
Packet Switching, Like You Are Five
Packet switching, like you are five
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Lesson notes
Key points
- Imagine mailing a big puzzle by putting each piece in its own envelope, then rebuilding it at Grandma's house.
- Really, data is split into packets with headers, each routed independently over shared links, then reassembled in order using sequence numbers.
Takeaway: Packet switching splits data into independently routed, shared-link packets.
Quick check: In packet switching, how are the individual packets of one message routed?
- All on one reserved path
- Each one independently
- Only through one switch
Packets carry headers, so routers forward each one on its own.
Puzzle in envelopesPacket switching
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