IT Job Interview

Network Questions

Why Your Network May Get Denial-of-Service Attacks, and How Can You Recover from the Attack?

This question is asked to network administrators and security officers in order to test insight of the candidates’ overall knowledge of the various attacks that may affect the organization. You’d better have some real life network security experience to giving a perfect answer. However, if you never dealt with denial-of-service attack and recovery, […]

Describe the Steps for Adding a Workstation with an Operating System to Your TCP/IP Network

This is a hands-on experience question.  The following answer is for UNIX platform.
The first step is to assign a unique internet address to the workstation.  The net-mask has to be assigned the same as other devices in that subnet.  The physical device has to be attached to the network, and the workstation connected.  When attaching […]

What Diagnostic Tools Have You Used to Troubleshoot Your Network in UNIX Platform?

Obviously, the interviewer wants to know if you have any hands-on skills on UNIX network troubleshooting.  If you do have the experience, you must have used the following handy tools:
Netstat – Shows the status of the network.
Ping – Sends packets to a destination address and tracks the performance of packets round trip.
Spray – sends packets […]

How is Routing Accomplished in a Multi-network Environment?

“Network routes are entirely contained within a single network.  The gateway NCPs, which are responsible for the interface between two networks, also provide virtual route termination services.  NCP translates the session routing from the virtual routes and subarea numbers used in one network to those in another whenever an information from crosses the network boundary.”

What considerations are there for Choosing Locally Administered Address Versus Universally Administered Address?

“Universally administered addresses are managed by the IEEE and are guaranteed to be unique worldwide.  For those adapters which support universally administered addresses, the adapter’s address is in read-only memory on the adapter and cannot be changed.  This means that if an adapter fails, its replacement will have a different universally administered address, which may […]