Explain what happens on the network, step by step, when someone types a website address into their browser and presses enter.

What the interviewer is looking for

• This question tests routing & switching. Explains VLANs, spanning tree, routing protocols like OSPF and BGP, and how packets actually move, accurately and practically.
• Strong answers: DNS lookup, address resolution to the gateway, routing across networks, TCP connection and TLS handshake, then the web request and response.
• Likely follow-up: Where in that process could things commonly fail?

Another way it may be asked: You type a shop's web address and hit enter. What is the network doing behind the scenes before the page appears?

A structure to follow: Answer, explain, example, limits

1. Step 1

   Answer

   Give your direct answer in the first sentence so the interviewer knows where you are going.

2. Step 2

   Explain

   Say how it works or why you would do it that way, in plain words before jargon.

3. Step 3

   Example

   Anchor it in something you have actually done or seen, with the detail that shows hands-on experience.

4. Step 4

   Limits

   Say when your approach would not be the right one. It shows judgement.

This is guidance on shape, not a script. Use your own real experience and facts; never invent details to fill a gap. See the STAR guide and answer frameworks.

Common slips

• Reciting a definition without showing you have applied it.
• Using terms you cannot explain if asked a level deeper.
• Claiming experience beyond what you can discuss in detail.

How to practise it

Say the answer in 90 seconds, then answer the follow-up as if it were a new question.

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