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Last updated on 2024年7月17日

Here's how you can get ready for a network engineering interview.

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Landing a job as a network engineer requires not only technical expertise but also the ability to effectively communicate your knowledge and experience during an interview. To ensure you're well-prepared, focus on understanding key networking concepts, protocols, and troubleshooting methodologies. You should be able to articulate your understanding of network topologies, routing and switching principles, and security best practices. Additionally, practical experience with network configuration and management tools is crucial. Familiarize yourself with common interview questions that may cover both theoretical knowledge and practical scenarios. By combining a solid grasp of networking fundamentals with the ability to demonstrate problem-solving skills, you'll be well on your way to impressing your potential employer.

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Suresh Vina

Network Engineer & Blogger at packetswitch.co.uk
Satheesh K CCIE-EI CISCO Emeritus

Network Consultant, Architect | Fitness Influencer, Fitness Trainer
Todd Magers, CISSP

Solutions Architect - Monitoring & Performance | CISSP | JNCIA #PerformanceMonitoring…

1 Know Basics

Before stepping into a network engineering interview, make sure you have a solid understanding of the fundamentals. This includes knowing the OSI (Open Systems Interconnection) model, which is a conceptual framework used to understand and implement standards for networking protocols in seven layers. Be prepared to discuss each layer, what it represents, and how it interacts with the others. You should also be familiar with common networking devices such as routers, switches, and firewalls, and understand the basics of IP addressing and subnetting . Being able to explain these concepts clearly shows that you have the foundational knowledge necessary for a role in network engineering.

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Suresh Vina

Network Engineer & Blogger at packetswitch.co.uk
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Know your basics. If you mention anything on your CV, make sure you are ready to face questions about it. You don't need to know every small detail, just make sure you are familiar with the basics like how ARP works, TCP 3-way handshakes, and how packets travel in a network. If you are confident with the basics, work your way up to more specific things like routing protocols, firewalls, and L2 loops. Be yourself and don't overthink it.

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Satheesh K CCIE-EI CISCO Emeritus

Network Consultant, Architect | Fitness Influencer, Fitness Trainer
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I would say you should know the fundamentals. You should be strong on Network fundamentals. 1 . How packet traverse in the Network , what happens at each hop from point to point to end to end . 2. L2 protocols , L3 protocols how does it work on the above communication 3. Know about physical connectivity in practical world. 5. Think out of the box , learn practically rather than memorizing things.

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2 Review Protocols

Networking protocols are the backbone of communication in any network, so you'll likely be quizzed on them during your interview. Be prepared to discuss the details of key protocols like TCP/IP (Transmission Control Protocol/Internet Protocol), DHCP (Dynamic Host Configuration Protocol), DNS (Domain Name System), and others. Understand how these protocols work, their role within the network, and their importance in ensuring efficient data transfer. Brush up on the differences between protocols used for routing such as OSPF (Open Shortest Path First) and BGP (Border Gateway Protocol), as well as those used for remote access like VPN (Virtual Private Network) technologies.

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3 Practice Scenarios

In addition to theoretical knowledge, you should be ready to tackle practical scenarios that may be presented during your interview. Practice troubleshooting common network issues such as connectivity problems, slow network speeds, and security breaches. Be prepared to outline the steps you would take to diagnose and resolve these issues. Employers often look for candidates who can demonstrate a methodical approach to problem-solving, so practice explaining your thought process clearly and logically. This will show that you not only understand network theory but can also apply it to real-world situations.

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4 Emphasize Experience

Your previous experience can set you apart in a network engineering interview. Be ready to discuss specific projects you've worked on, particularly those where you've designed, implemented, or managed network infrastructure. Highlight any unique challenges you faced and how you overcame them. If you have experience with certain network management tools or software, mention these and explain how they've been beneficial in your work. Sharing concrete examples from your past roles demonstrates your capability to handle the responsibilities of the position you're interviewing for.

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Ankit Mishra

Crafting with Creativity as Cloud Security Software Engineer @Cisco ??|Turning Algorithms into Applications ?? |Former Intern @Cisco, @KPMG, @Smytten | Ex-Technical Head @ISTE Manipal, @ADG|
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Shifting the journey from software engineering to Network Engineer/Devops engineering does seem to be tough at start. But staying consistent with right resources needed to learn at your own pace, asking appropriate questions and playing with some sample hands-on project helped me a lot to grasp knowledge on it quickly here and thats what can help you interview, staying strong with basics

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5 Discuss Trends

The field of network engineering is always evolving, so it's important to show that you're up-to-date with the latest trends and technologies. Be prepared to discuss recent advancements such as software-defined networking (SDN), network function virtualization (NFV), and the impact of cloud computing on network architecture . You might also be asked about your thoughts on cybersecurity trends and how to secure a network against emerging threats. Demonstrating your awareness of these topics indicates that you're proactive about staying informed and are prepared to work in a modern networking environment.

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Todd Magers, CISSP

Solutions Architect - Monitoring & Performance | CISSP | JNCIA #PerformanceMonitoring #ProtocolAnalyst #Observability
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Others have covered the basics and other topics above, but this one is really important. It is important because only part of a Network Engineer's job is deploying and supporting... A big chunk is having vision, and curiosity to be looking forward. In technology, standing still is equivalent to going backwards. You must be looking at the future, look at what the IEEE and IETF are up to, read about new technologies, try to use new technologies in a Lab, (you have a Lab, right?). That's my 2 cents!!

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6 Ask Questions

An interview is a two-way street, and asking insightful questions can leave a positive impression. Prepare a list of questions about the company's network infrastructure, the team you'll be working with, and the challenges they're currently facing. Inquiring about the technologies and processes in use at the company not only shows your interest in the role but also gives you valuable information to assess whether it's the right fit for you. Asking questions can also lead to discussions that may highlight additional skills or experiences relevant to the role.

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Todd Magers, CISSP

Solutions Architect - Monitoring & Performance | CISSP | JNCIA #PerformanceMonitoring #ProtocolAnalyst #Observability
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As someone who has conducted technical network interviews many times, I can say for certain that things that were current challenges would almost always come up when I was conducting an interview. So, if you are asked a "corner case" type of technical question, follow up your answer and ask if they are having a challenge with that... just be inquisitive. It demonstrates you are interested in solving new and perplexing issues, or designing new solutions. That's my 2 cents worth!!

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7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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Ankit Mishra

Crafting with Creativity as Cloud Security Software Engineer @Cisco ??|Turning Algorithms into Applications ?? |Former Intern @Cisco, @KPMG, @Smytten | Ex-Technical Head @ISTE Manipal, @ADG|
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This is in perspective of beginner level interview only. I would suggest to keep the necessary basics strong on Computer Networks , DSA and other fundamentals as required. Dont stress out studying much during last moment before interview and if possible keep short handed quick revision notes ready of 7-8 pages per subject. Some of these resources are readily available in internet too. The best learning you can always is learning from your past mistakes you made during your interview and try to improve upon that skills or set of questions as necessary

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Here's how you can get ready for a network engineering interview.

1

2

3

4

5

6

7

1 Know Basics

2 Review Protocols

3 Practice Scenarios

4 Emphasize Experience

5 Discuss Trends

6 Ask Questions

7 Here’s what else to consider

Network Engineering

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Here's how you can get ready for a network engineering interview.

1

2

3

4

5

6

7

1 Know Basics

2 Review Protocols

3 Practice Scenarios

4 Emphasize Experience

5 Discuss Trends

6 Ask Questions

7 Here’s what else to consider

Network Engineering

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