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8,704 network engineer interview questions shared by candidates

1. what is the difference between a router and a switch ? 2.what is the difference betwwen UDP and TCP ? 3.explain to me DHCP and DNS ? 4.on which layer of the OSI model is the a network cable ? 5. what is the Spanning tree protocol ? 6.on which layer is a switch and a router located of teh OSI model ? 7.on which layer of the OSI model is VLAN ? 8. how do you move a file from one directory to the other in linux ? 9. how do you change the permission of a user to execute permission ?
avatar

Network Support Engineer

Interviewed at Amazon

3.5★
Nov 8, 2023

1. what is the difference between a router and a switch ? 2.what is the difference betwwen UDP and TCP ? 3.explain to me DHCP and DNS ? 4.on which layer of the OSI model is the a network cable ? 5. what is the Spanning tree protocol ? 6.on which layer is a switch and a router located of teh OSI model ? 7.on which layer of the OSI model is VLAN ? 8. how do you move a file from one directory to the other in linux ? 9. how do you change the permission of a user to execute permission ?

So, you have a laptop which will be connected in a branch office. So, you are working remotely. Let's say you go to a branch office, right? Plug in your laptop physically into your switch. Cable it up. I'm keeping it simple, taking wireless off. So, after you connected to the network, say your laptop had to download some patches from your central server, which is present in your enterprise, right? Call it, like, update.mycompany.com. It's going to connect and download some patches. This is the use case. This is the scenario that you are using here. So, basically, let's dive deep and go into some questions on networking. Given this, can you run me through the events that happen in the network from the time your laptop is connected and till the updates are downloaded?
avatar

Network Development Engineer

Interviewed at Amazon

3.5★
Jun 16, 2025

So, you have a laptop which will be connected in a branch office. So, you are working remotely. Let's say you go to a branch office, right? Plug in your laptop physically into your switch. Cable it up. I'm keeping it simple, taking wireless off. So, after you connected to the network, say your laptop had to download some patches from your central server, which is present in your enterprise, right? Call it, like, update.mycompany.com. It's going to connect and download some patches. This is the use case. This is the scenario that you are using here. So, basically, let's dive deep and go into some questions on networking. Given this, can you run me through the events that happen in the network from the time your laptop is connected and till the updates are downloaded?

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