CompTIA Network + Job Interview Questions




Businesses today need a skilled, certified, and smart network engineer who can work out strategies to enhance their business model to walk along its competitors in this technologically advanced era. Therefore, those interested in doing well in the field need to have a CompTIA Network+ certification.

Once you have the certification under your name, it becomes easy for you to apply for a network engineer position at any firm. If you are planning on giving a job interview as a network engineer, we have a list of most-commonly asked questions for you to look at!

Q1- What Protocol Would Be Used To Automatically Assign IP Addresses?

The DHCP protocol is used to automatically assign IP addresses to printers, desktops, and servers. Although the servers and printers can be assigned their static IP address, they can also be assigned the DHCP server settings.

Q2- Can You Tell About The Network Layer And The Physical Layer In The OSI Model?

Routing and assigning addresses are the two tasks performed by the network layer. The IP addresses assigned to each node on the network is done through assigning addresses and routing assigns traffic to another segment of the network.

The physical layer in the OSI model on the other hand is all about the binary information transported across the cables of the network.

Q3- What Happens When You Enter A URL Into The Browser?

The address you type into the URL goes directly to the DNS server to resolve the domain name associated with the IP address so the user can access the site. If the interviewer asks you about the DNS server then you can go on to tell them that it is the server specified in the network configuration.

Q4- How Would You Get To Local Routing Table Listing?

Through Netstat –r command.

Q5- Can You Define Subnet?

The segmented part of the network that is separated using a router is defined as a subnet. A subnet is used to minimize congestion and lower traffic on the network so that its quality is improved. It also enables us to add security to the network through the router.

Q6- What Are Some Open-Source Network Tools That Detect Weaknesses In The Network?

NMap, Metaspoit and Nessus.

Q7- What Are Some Of The Routing Protocols?

  • Border Gateway Protocol (BGP)
  • External Gateway Protocol (EGP)
  • Routing Information Protocol (RIP)
  • Open Shortest Path First (OSPF)
  • Enhanced Internet Gateway Routing Protocol (EIGRP)

Q8- What Makes Subnetting A Good Choice?

Subnetting allows routing and network administration to be more efficient. It does so by minimizing the routing tables and by lowering network traffic. What’s more is that with the help of subnetting, the network admin can divide a network into smaller virtually defined segments. Some parts of the network can be isolated, resulting in additional security that works wonders for businesses on a day-to-day basis.

Q9- What Is A Node And A Router?

A node is a name used for the devices on the network. These devices may include desktop, server, or any virtual device. All of these devices are connected to the network through a cable or wireless connection.

A router works as a traffic handler on the network. If there is more flow of traffic in one section of the network, it redirects it to another segment. Routers do not broadcast signals but they only work to distribute traffic on the network.

Q10- How Would You Define A Protocol?

All the communication that happens within a network and amongst networks is done through a protocol. A protocol is an instruction manual for overall network communication. The TCP/IP protocol is used by the internet and this protocol is responsible for allowing devices to form connection and communication with a set of instructions or rules. This enables devices to read and reply to messages on the network.

Q11- What Will You Do If Users Are Unable To Connect To A Server?

Companies want to make sure that they are hiring a network engineer who can fix ongoing problems faced by their employees so they can work without delay. One such problem that employees commonly face is not being able to access a server.

In order to help users access a server, it is best to use the ‘ping’ command. This command enables us to see whether packets are returned or not and if the server is connected or not. Using custom tools to check server resources is also another way to see if the server is not working properly.

Q12- How Will You Protect A Company From Losing Critical Data?

Businesses big and small have huge amounts of data that they need to protect. In circumstances when a simple network breach puts the entire company data at risk, it is the job of a network engineer to try and fix things.

Your answer to this question should go something like this:

Disaster recovery is the best bet against data loss in case the network is being compromised. It allows safe retrieval of data and allows backups to be created. It is also highly useful in protecting company data from hackers.

Q13- Which Protocol Analyzer Would You Name?

Wireshark

Q14- How Would You Identify A Web Server On A Site?

A banner grab allows the identification of a web server on a site.

Q15- Name The Layers In The OSI Model?

There are seven layers in the OSI model including the following:

  • Physical
  • Data Link
  • Network
  • Transport
  • Session
  • Presentation
  • Application

A network engineer with a CompTIA Network+ certification is quite valuable for organizations looking for smart people to add to their team. Such an individual not only manages company network efficiently, but also works as an administrator and helps implementing and developing the network to its best potential.

Learn everything you can about networks and how they work by completing CompTIA Network+ certification. This certification is your best bet at building a solid base for a career in engineering.

About The Author
Anas
Netapp Associate Instructor

Anas Ijaz

Anas is an expert in all things Network. He works with Netapp Storage Solutions, AWS Cloud (Managing and Deploying Networks), Microsoft Azure, and Office 365 Administration and Integration. He is a Microsoft Certified IT Professional (MCITP) and is currently preparing for CCNA.

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