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2017 Exam - Q3a)

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From: Christopher M.
Date: Sun 7th Jun, 7:22am



> When answering this question, I get the following steps:
> 1. Source host sends a UDP to the gateway asking for the address of the target host
> 2. Gateway sends a ARP frame asking for the address of the target host
> 3. Target host response to ARP frame
> 4. Gateway caches the address
> 5. Gateway sends a UDP back to the source host with target address
> 6. Source sends UDP to the gateway with the target destination as part of the frame
> 7. Gateway sends to the target address using information stored in the cache

Protocols at multiple levels are required for this answer, so when you say 'the address', 'the 
response', and 'the information' you'll need to specify what kind of addresses, for which 
protocol, you're meaning, and what the responses involve.

Do your points 1 and 5 mean to say UDP, or ARP?

> I'm just wondering, is this what is required to get 10 marks? Am I missing something? 
> It seems like the answer requires a lot less explanation than other questions.

When you provide the information I've suggested, above, your answer will easily double in size. 
But marks are not awarded for the size of the answer, but its correctness, and the difficulty in 
answering the question.

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2017 Exam - Q3a) (both) RSS
├─ original   Sat 6th Jun, 11:22pm, ANONYMOUS
└─ THIS   Sun 7th Jun, 7:22am, Christopher M.
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