Common Questions Asked During A Network Engineer Interview
The interview for a Network Engineer role will inevitably start with the general questions we have all heard before . To then go from interviewee to employee, you will need to know more. We have collected some FAQs for you from employers, headhunters, and network engineers on what topics might arise during an IT job interview. Prepare answers for these questions and you will not have to say, wait, I can check it on Google. :
What Is A Network Engineer
Network engineers can be defined as those professionals who build and maintain the day-to-day operations of computer networks. They deliver a high-availability network infrastructure for sustaining the users online and on-site information technology activities. Their roles often overlap with computer network architects or security systems engineers.
Also called Network Architects, their primary goal is to provide maximum network infrastructure, security, and performance to the end users. In short, the prolific bunch decides and configures suitable data communications components to meet the users needs.
What Is Router On A Stick Configuration
Routing between VLANs or different network segments is commonly known as the router-on-a-stick configuration. Instead of connecting each VLAN to its own router interface, you can connect the switch and the router together using a single physical trunk link. Then you can use that single trunk link to pass all the VLANs.
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Q: What Do You Use On Your Own Personal Network
A: An interviewer will want to know what sort of security measures you use on your own home devices. After all, if youre a hotshot network security expert, clearly that must be reflected in the network that means the most to you your personal system! An employer can tell a lot about your network savviness by analyzing what measures you use for your devices.
Graphic Scales: 1 To 5 Rating Scale And 1 To 10 Rating Scale Examples
Unlike Linear Numeric Scales, the Graphic Scales may not have numbers on the scale and can ask respondents to express their satisfaction by choosing the corresponding number of graphical objects stars, balls, cakes.
The most commonly used Graphic Scales indicate the answer options on a scale of 1 to 10 and 1 to 5. The stars and numbers represent a quantity that can be averaged and analyzed similarly to Linear Numeric Scales.
How would you rate your experience with AidaForm website?
1 Awful, 3 Neutral, 5 Great
How would you rate your experience with AidaForm customer support?
1 Awful, 10 Great
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What Do You Mean By A Point To Point Link
A point to point link is a connection between two dedicated networking devices.
The complete bandwidth of the link is utilized for the transmission of data between two devices.
There may be multiple connections between devices. Using a PPP link, two different networks can be connected, where one network will work as the endpoint for another.
These days PPP links are created using modems and PSTN .
An example of a PPP link is a telephone call between two people.
How Does Dhcp Help In Network Administration
DHCP is a protocol for network computers to automatically request and receive IP addresses, subnet masks, default gateway, and other IP configuration information from a DHCP server. This eliminates the need for the network administrator to individually visit and configure the network settings statically on each computer.
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What Is An Interview Rating Scale And How To Create Your Own
The Indeed Editorial Team comprises a diverse and talented team of writers, researchers and subject matter experts equipped with Indeeds data and insights to deliver useful tips to help guide your career journey.
Interviewing candidates for open positions is an important part of building a successful team. It can be hard to know what to look for in a candidate without the proper preparation. Interview rating scales can help you manage the interview process by creating a guide for each interview. In this article, we discuss what is an interview rating scale, why they are important, how to create one, four benefits, as well as a template and example you can use when creating your own scale.
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What Are Proxy Servers And What Role Do They Play In Network Security
A proxy server is a program that acts as an intermediary between a client and a server. The primary function of a proxy server is to allow clients to request data from one or more servers on the Internet without disclosing the clients internal private IP address. This is often done for security reasons, to mask the location of a network from unauthorized individuals, or simply to hide its existence from other computers on the Internet.
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Why Is Network Engineer Role In High Demand
A Network Engineer in AI is highly in demand in the present times. According to Bob Friday, Chief AI Officer Juniper and CTO Enterprise, AI affects network engineering in prominent areas: Detecting time series anomalies and Unsupervised Machine Learning. In the coming years, it will also identify bad implementations of the 802.11 specifications and predict user experience by application.
Business enterprises are heavily investing in AI and ML as they have a bigger role to play in future networks and data centers. For example, Ronald Acra, Senior VP, and Chief Technology Officer at Cisco says his company has a particular server system targeted at supporting AI and ML applications. It has also incorporated several ML techniques to drive networking changes.
The U.S.Bureau of Labor Statistics predicts the growth of Network Engineer jobs at 5% between 2020 and 2030.
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Can You State The Differences Between A Switch Router And A Hub
A switch is used for forwarding the data packets in a network. It facilitates error checking for the data packets and send error-free packets to the destined ports properly.
A router is a networking device that transfers data packets after analyzing their contents.
The correct destination, correctness and IP address of the data packets are checked by the router.
They make use of a routing table for finding out the best path for transmission.
A hub is a connection point for networking devices. Different segments of a LAN are connected using a LAN. It also has several ports for communication.
If a packet arrives at a hub port, it is copied to the other ports so that it is visible to the other segments of the LAN. But as they are unable to filter data, it sends the data packets to all the connected devices.
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What Is An Ipv4 Address What Are The Different Classes Of Ipv4
An IP address is a 32-bit dynamic address of a node in the network. An IPv4 address has 4 octets of 8-bit each with each number with a value up to 255.
IPv4 classes are differentiated based on the number of hosts it supports on the network. There are five types of IPv4 classes and are based on the first octet of IP addresses which are classified as Class A, B, C, D, or E.
|No error checking mechanism|
|Protocols like HTTP, FTP, Telnet, SMTP, HTTPS, etc use TCP at the transport layer||Protocols like DNS, RIP, SNMP, RTP, BOOTP, TFTP, NIP, etc use UDP at the transport layer|
What Are The Benefits Of Address Sharing
Address sharing is done through NAT , and it allows multiple inside hosts to share the same Public IP address. You need a special device capable of doing NAT, for example, a router or a firewall. Address translation not only saves Public IP addresses but also has an inherent security benefit compared to routing. Thats because servers on the Internet can only see the public IP address of the external interface of the firewall, not the hosts private IP address behind it. The firewall has an inbuilt NAT table for address translation which maps public ip addresses and ports with Private IP addresses and ports of every connection.
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Use Of Rating Scales In Interviews
The interviewing process often includes the use of rating scales that the interviewers use to evaluate the quality of the interview and lead to some kind of recommendation of the candidate for the job in question. Ratings generally evaluate one or more of the following:
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What Are Some Basic Ways To Speed Up Network Performance
The interviewer is gauging your level of proactivity and your problem-solving skills.
“Network performance is reliant upon user activity. A few ways to speed up the performance include restricting media streaming and peer-to-peer downloading. Also, adding compression to files to reduce the amount of bandwidth being used. Lastly, timed backups and large data transfers should be conducted at slow network times, preferably overnight.”
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What Is A Gateway
A gateway is a router or layer3 device that handles all network traffic between two networks. For example, if you are connected to the Internet through your home modem, that modem is your network gateway. A gateway can provide services like routing, network translation, DHCP, DNS, VPN, firewall, web server, etc..
Senior Network Engineer Interview Questions And Answers
You are an experienced network engineer. So, the questions in the Senior Network Engineer Interviews will be the questions that has middle level difficulty. The interviewer will ask you about the lessons that you should know during your job, during network operations. They will try to learn that you are really ready for this network job. They will ask specific network questions on various network protocols, on various network scenarios and with these Network Engineer Interview Questions, they will determine your network level if it is suitable for this role or not. In this page, we will cover many Senior Network Engineer Interview Questions and Answers to prepare you for such technical interviews.
In a Senior Network Engineer Interview, network questions are generally specific questions to the role. At the beginning, they ask you basic network questions and the difficulty of the questions increases after each question. So, you should be really ready before your real network interview. You should practice more with Senior Network Engineer Interview Questions and Answers to be successful in your technical network engineering interview. Here, with IPCisco CATs, you will find many real Senior Network Engineer Interview Questions and Answers. You can test yourself with these questions and you can be familiar with real interview questions.
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What’s Your Experience Working With A Development Team
It’s becoming more common for networking and development teams to work together to support each other in a shared goal. An interviewer may ask you this question to gain insight on how you’ve communicated with other important teams in your prior roles and to understand more about how you feel about the collaboration between team. Pause before answering to plan your response and consider including an example.
Example:”In my previous position, I worked closely with the DevOps teams to make sure the rollout of different software didn’t negatively impact our network optimization. We communicated all throughout the development of the software so my team knew what to expect and what network resources the team would need to effectively launch the software to all users.”
Q: Explain The Difference Between A White And Black Hat Hacker
A: Black and white hat hackersare different sides of the same coin. Both groups are skilled and talented in gaining entry into networks and accessing otherwise protected data. However, black hats are motivated by political agendas, personal greed, or malice, whereas white hats strive to foil the former. Many white hats also conduct tests and practice runs on network systems, to ascertain the effectiveness of security.
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Top 60 Networking Interview Questions And Answers
Most Frequently asked Networking Interview Questions and Answers with Pictorial Representation for your easy understanding:
In this advanced technology world, there are none who have never used the Internet. One can easily find an answer/solution to whatever he/she doesnt know with the help of the Internet.
Earlier, for appearing in an interview, people used to go through all the concerned books and materials available page by page carefully. But the Internet has made it all so easy. There are several sets of interview questions and answers available easily nowadays.
Hence, preparing for an interview has become very simpler these days.
In this article, I have listed the most important and frequently asked basic networking interview questions and answers with pictorial representation for your easy understanding and remembrance. This will strive towards success steps in your career.
What Is A Switch Or More Specifically Ethernet Switch
Any device that forwards frames based on their Layer-2 MAC addresses using Ethernet. While a hub repeats all frames to all ports, an Ethernet switch forwards frames only to the ports for which they are destined. An Ethernet switch creates a collision domain on each port, while a hub generally expands a collision domain through all ports.
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What Is The Use Of A Proxy Server
Proxy servers are used for securing a network from external users who might want to intrude into the network. It makes a computer system virtually invisible to others.
A proxy server has a list of harmful websites so that the main network is protected.
When it receives a request, it collects the data from the target web server and processes it. The response is then forwarded to the user.
Choose The Interview Questions
All your questions are pre-planned when using a scoring matrix. The tricky part is asking the right questions and ensuring they align with your hiring criteria.
No company is the same, so youll want to focus on questions that make sense for your business. For example, a creative agency will want to ask questions about the creative process, from concepts to production. Theyll opt for more creative competencies. A technology company may focus more on problem-solving and communication skills.
To know where to focus your questions, youll need to know which skills youre targeting and how theyre typically expressed on a successful project at your company.
Take a look at these behavioral questions as an example:
All of these questions align with specific hiring criteria. It helps you ask questions relevant to the specific skills and personal traits required for the job.
Take these best practices into account when creating your job interview questions.
Have supporting questions for your main questions
Candidates get nervous, forget things, and may not give you the information you need to determine if theyre right for the job. If you feel like a candidate could expand on their answer, have some related questions in place.
Imagine asking a candidate to describe a time they had to lead a team. To dig a little deeper, you could ask follow-up questions like:
All of these questions encourage the candidate to expand on their original answer.
Make your questions open-ended
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What Are The Layers Contained In The Osi Reference Model
There are seven layers in the OSI Reference Models:
- The physical layer converts data bits into radio signals.
- The data link layer is where packets are encoded and decoded into bits for node-to-node transfer.
- The network layer transfers data sequences from one node to another.
- The transport layer transfers data between nodes and acknowledges successful transmissions.
- The session layer establishes and terminates local and remote application connections.
- The presentation layer transforms data into a form that’s accepted by the application layer.
- The application layer interacts with the application to enable tasks like email, data transfer, etc.
Senior Network Engineer Interview Questions
Senior network engineers will be expected to have a plethora of experience and mastery of the technical knowledge surrounding network engineering. Youre looking for someone who wont require a lot of onboarding and who you can rely on to step in, understand the goals of the company, and integrate into your system with relative ease.
Below are some key interview questions to ask for senior network engineer candidates.
- What was the largest network that you built from the ground up?
- How has your experience prepared you for a senior position?
- As a senior network engineer, we might rely on you to manage a team of engineers. How do you see yourself in a leadership position?
- You will be expected to follow current innovations in AI, cloud, network automation, etc. Whats your strategy for keeping up with these trends?
- How do most routing protocols work and in what situations dont they work?
- If there were an issue with networking data planes and control planes, what are the first steps you would take to identify the problem?
- Provide them with a complex networking scenario and ask them to walk you through their protocol on a white board.
- A team member isnt understanding how to properly troubleshoot an issue how would you handle the situation?
What Are The Differences Between Analog And Digital Signals
Below is a list of the most significant distinctions between analog and digital signal transmission:
|The analog signal is continuous and varies in time.||A digital signal has two or more states and is binary in form.|
|An analog signal is represented in the form of sine wave.||A digital signal is represented in the form of square wave.|
|An analog signal is Easily affected by the noise.||On the other hand , Digital signals are more stable and less prone to noise.|
|Analog signals can be impacted during transmission.||Digital signals are more robust and cannot be affected during data transmission.|
|Analog signals consumes more power.||While Digital signals consumes less power.|
|Example of Analog Signals are : Temperature, Pressure, Flow measurements, etc.||Examples of Digital signals are : Valve Feedback, Motor Start, Trip, etc.|
|Troubleshooting Analog signals are a bit difficult.||Digital signals are easier to troubleshoot compared to Analog signals.|
|Analog circuits utilize components such as resistors, capacitors, inductors, and diodes.||Digital circuits use components such as transistors, logic gates, and microcontrollers.|