- 2076 Asoj · 2 marks
Datagram vs virtual circuit switching
Short answer
Datagram switching routes each packet independently with full address, so packets may arrive out of order. Virtual circuit switching sets up a logical path first, uses a short VC number, and all packets follow the same route in order. Examples: IP versus X.25, Frame Relay, ATM.
Differentiate between datagram switching and virtual circuit switching.
Both are packet-switching methods. In datagram switching each packet is routed independently; in virtual circuit switching a logical path is set up first and all packets follow it.
| Point | Datagram | Virtual circuit |
|---|---|---|
| Set-up phase | None | Call set-up and release needed |
| Addressing | Full address in every packet | Short VC number |
| Route | Each packet may take a different path | All packets on the same path |
| Packet order | May arrive out of order | Arrive in order |
| Router failure | Only lost packets affected | All VCs through it fail |
| Examples | IP (Internet) | X.25, Frame Relay, ATM |
✓ Answer checked by Claude Opus 5.5 (high effort)
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