Network Security Engineer Interview Questions
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Network Security Engineer interview questions shared by candidates
They asked me about Linux OS.
4 Answers
How many bits do you need for a subnet size.
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Need to know subnetting off top of your head.
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The minimum addresses needed is 2 bits for 4 addresses 2^(# of addresses) = 2^2 which used for pint to point links. Max addresses can go as much as class A IP address /8 so for maximum bits is 32-8 = 24 bit Less
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If number of addreses required in a subnet is "N" , then you need 2 more (network and bcst addreses) in addition to "N". So "N+2" is rounded of to Next 2 to the power . For e.g if we need 64 addresses in a subnet then , 66 rounded to next 2 to the power is is 2**7 ie 128. so number of bits required is 7. Less
I was asked questions on the networking basics and also certain topics related to the network security. Questions were asked on small things like how does a mail pass or how does a computer boot up to check the in-depth technical knowledge. Also various questions were asked on port nos and protocol nos and some questions related to Linux basics . Lastly some personal questions to end the interview
1 Answers↳
Learning the course module of CCNA will be of good use for cracking the interview. Doing a certification in the same would be an added advantage. Also Google the most famous questions or most frequently asked questions for this job role. Less
Explain policy (refused to explain if this involves cyber security, Active Directory, firewalls, ...).
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I provided answers for cyber security, Active Directory, firewalls, ...
Normal Practical Question on ongoing project related and technology which is presently working with
1 Answers↳
Given all practical answer
Write out a Cisco ASA firewall configuration on the white board to allow three networks unfiltered access, 12 networks limited access to different resources on different networks, and 8 networks to be blocked altogether.
1 Answers↳
Using netgroups, a solution was provided in a 40 line configuration.
Wanted a detail breakdown of packet headers.
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The key in these questions is to cover the fundamentals, and be ready for the back-and-forth with the interviewer. Might be worth doing a mock interview with one of the Rackspace or ex-Rackspace Network Security Engineer experts on Prepfully? They give real-world practice and guidance, which is pretty helpful. prepfully.com/practice-interviews Less