Network Management Interview Questions & Answers part 1


Q: – What is the difference between a hub, a switch, and a router?

A hub is a small, simple, low-priced device that joins multiple computers together. A switch is a small hardware device that joins multiple computers together within one local area network (LAN) and they operate at layer 2 of the OSI model. Routers are the physical devices that join multiple wired or wireless networks together and they operate at layer 3 of OSI model.

Q: – What meaning has ICMP?

The Internet Control Message Protocol or ICMP is belonging to the TCP/IP set and has the role of testing the notifications transmissions of hosts and gateways and manages the messages of error and control.

Q: – How is UDP different from TCP?

While TCP is a network protocol that is based on connection, UDP is not connection based. Connection means that the transfer of data between two points on a network is made with the acknowledgement of the success of the process. TCP is used if we want to transfer data and receive confirmation that the data was really sent, no matter in what time period it was made. For example UDP is used when a movie is streamed and we need continuous frame play without interruptions.

Q: – What was the strangest situation that you had to deal with regarding managing a network?

The candidate will answer to this question mentioning an experience in which he/she had difficulties being understood by the other workers in the company and his/her suggestions were not followed as they were explained, leading to a network fail or other severe problems.

Q: – Please tell us some job specific tasks that you have performed in your previous organization?

The profession specific tasks that I have performed include installing the original, new version software, keeping record of all the changes to the network environment, managing local area network and providing backup. I had also supervised all the activities on the network and developed management information solutions by using business objects.

Q: – What are your technical and non-technical skills?

Well, I have 8 year experience as network manager. During the entire course of my profession I have acquired various technical and non-technical skills. I have gained good logical and technical knowledge of networking and software. I have intensive knowledge of Oracle database systems, design, crystal reports and .NET. Apart from this, I have excellent communication and interpersonal skills and I have the ability to function successfully in both team and independent work environments.

Q: – How a network maintenance operation is made?

The maintenance of a network is made by running tests for the purpose of detecting viruses, breakdowns, hackers or bugs. A network administrator should always stay updated with the latest technology and this can be made only through constant market research. Staying up-to-date helps the administrator to improve the network and to maintain it in a good state all the time.

Q: – Which are, in your opinion the best traits of a network administrator?

The guys that are involved in network administration in most cases they are natural fixers, they were passionate about computers since they were kids and they know when a problem appears before it makes much damage, they are able to prevent it so it is not necessary to repair it.

Q: – How can you explain the meaning of a Remote Procedure Call or RPC?

A Remote Procedure Call makes the complexity of the network hidden. It actually invokes a remote server function and closes itself until the results come back. This process is a synchronous one.

Q: –What is the meaning of Middleware?

For the good communication between servers and clients there is a software called Middleware. Its behavior is just like the one of a bridge. The application from the client calls a service and Middleware manages the transfer through the network and receiving results. Middleware doesn’t contain any additional software, the other applications are found on the server or on the client.

Q: – Do you difficult for a network administrator to stay so much in front of the computer?

When a person decides to become a network administrator he/she must be aware that physical effort will not take part of the job and even if it is , in rare occasions, it is minimal. The work of a network administrator resumes to doing different tasks on the computer and giving phone calls for support. In rare occasions he may act as a system administrator but this is due to urgency.


Submitted By:– Jai Kundu          Email-ID: –