Top Network Engineer Interview Questions with Example Answers [2020]

Prepare for your Network Engineer interview by going through these most asked Network Engineer interview questions. Additionally, get access to sample answers and interviewer's expectations.

Search Network Engineer Questions:


  • Question: How will you connect the socket and session?
  • Question Overview: This question is designed to see if the applicant has a basic understanding of how a socket and session are connected. The answer should be detailed and include the specific protocols that are used.

    Sample Answer: I will use TCP to establish a connection between the client and server. Once the connection is established, I will use HTTP to send data between the two.

      What the interviewer is looking for:
    • - Detailed answer
    • - Protocols used
    • - Understanding of session and socket

  • Question: What is BGP?
  • Question Overview: BGP is a routing protocol that is used to exchange routing information between networks. The applicant should be able to explain the basics of BGP and how it works.

    Sample Answer: BGP is a routing protocol that allows networks to exchange routing information. It's used in large networks where there are multiple connections between different organizations.

      What the interviewer is looking for:
    • - Basic understanding
    • - Ability to explain
    • - Experience with BGP

  • Question: What is an access list?
  • Question Overview: An access list is a security measure that allows or denies network traffic based on the source or destination IP address. The applicant should be able to explain how they would use an access list to protect your network from unauthorized access.

    Sample Answer: An access list is a security measure that allows or denies network traffic based on the source or destination IP address. I would use an access list to restrict traffic from a specific IP address or range of IP addresses.

      What the interviewer is looking for:
    • - Understanding of access lists
    • - Use case
    • - Experience with this technology

  • Question: What is the OSI model?
  • Question Overview: The OSI model is a network design model that is used to help network engineers understand how different layers of the network interact with each other. The applicant should be able to explain the model and how it is used in their work.

    Sample Answer: The OSI model is a layered network design model that helps network engineers understand how different layers of the network interact with each other. It's used to help with troubleshooting and designing new networks.

      What the interviewer is looking for:
    • - Understanding of the OSI model
    • - How it is used
    • - How it can be applied

  • Question: Where do you see yourself in the next five years?
  • Question Overview: The applicant should be able to provide a clear answer to this question. You want to make sure that they have a plan for their career and that they're not just looking for a job.

    Sample Answer: I'd like to be a senior network engineer at a large organization. I'm looking for a company that will allow me to grow my skills and take on more responsibility.

      What the interviewer is looking for:
    • - Career path
    • - Goals
    • - Ambition

  • Question: How will you describe the network model?
  • Question Overview: The network engineer should be able to describe the network model in a way that makes sense to you. They should be able to explain their design decisions and why they made them.

    Sample Answer: The network model I created for this company is a hybrid cloud solution. It uses a mix of on-premises and cloud-based resources to support their needs. I chose this model because it allows them to scale up or down as needed without having to invest in additional hardware.

      What the interviewer is looking for:
    • - Clear explanation
    • - Good understanding of design
    • - Good understanding of technology

  • Question: How will you differentiate between a hub and a switch?
  • Question Overview: The applicant should be able to differentiate between a hub and a switch and explain why they are different. This question is designed to gauge their technical knowledge and understanding of the network.

    Sample Answer: A hub is a device that connects multiple devices together in a network. A switch is a device that connects multiple devices together in a network and can filter the data that is sent between them.

      What the interviewer is looking for:
    • - Technical knowledge
    • - Understanding of network devices
    • - Ability to explain

  • Question: What was your best job and why?
  • Question Overview: The applicant should provide a detailed answer that highlights their most positive work experience. They should also be able to explain why they enjoyed it so much.

    Sample Answer: My best job was at a small business where I was the only network engineer. I was able to work closely with the CEO and COO to create a network that met their needs and was cost-effective.

      What the interviewer is looking for:
    • - Detailed explanation
    • - Positive experience
    • - Enjoyable job

  • Question: What are some of your past projects?
  • Question Overview: The applicant should be able to provide a list of projects they have worked on and the type of work they did. Look for projects that are relevant to your organization and that highlight their skills.

    Sample Answer: I've worked on several network projects, including the implementation of a new network topology, the replacement of a core router and the creation of a disaster recovery plan.

      What the interviewer is looking for:
    • - Relevant projects
    • - Skills highlighted
    • - Experience with the technology

  • Question: Why do you want to work with us?
  • Question Overview: This is a simple question that gives you a chance to gauge the applicant's enthusiasm for your organization. They should be able to give you a few reasons why they want to work for you specifically.

    Sample Answer: I've been following your company for a while now and have been impressed with the way you've grown. I'm excited to be part of a team that is helping to shape the future of the industry.

      What the interviewer is looking for:
    • - Specific reasons
    • - Enthusiasm
    • - Experience with your company