Discussion
Match the following OSI layers with protocols :
| (a) Layer 7 (Application) | (i) IPv4 |
| (b) Layer 4 (Transport) | (ii) UPP |
| (c) Layer 3 (Network) | (iii) HTTP |
| (d) Layer 2 (Data Link) | (iv) Ethernet, WiFi (802.11) |
Answer: D
The correct matching is a-(iii), b-(ii), c-(i), d-(iv).
- Layer 7, application: HTTP.
- Layer 4, transport: UDP (printed 'UPP').
- Layer 3, network: IPv4.
- Layer 2, data link: Ethernet and Wi-Fi (802.11).
Options A, B and C all put Ethernet and Wi-Fi at the application layer and HTTP or IPv4 at the wrong layers, so only D is right.
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