Networking interview questions

What are the principles that were applied to arrive at the seven layers in OSI model?

What are the reasons for using layered protocols ?

Enumerate the main responsibilities of data link layer ?

Draw the IP datagram header format. "IP datagram has a checksum field still it is called an unreliable protocol". Justify?

What are the two reasons for using layered protocols?

What do you mean by link to link layers of OSI reference model? Explain their functions briefly?

Write a short note on ISDN?

What is the difference between boundary level masking and non- boundary level masking? Give examples

What is the difference between LUN and RAID?

Can we extend the range of Wifi with the use of some softwares, if yes, which one? Or is there any hardware to do so, how much will it cost?

What is computer.

What is backup? what are those types and where those are used?

Can we use pc as router?

NFS server + Solaris client + Linux client, all connected at GigE to the same switch. The Linux client is fast but the Solaris client is slow. Explain troubleshooting steps

systems on the same switch: A can talk to B; A can talk to C; B cannot talk to C. How do you troubleshoot the problem?

Assume you have to build 30 systems (mix of Solaris + Linux) in a brand new place (ie: no existing infrastructure). How do you tackle this?

FILESYSTEM scenario. A volume is filling up and almost out of space. How do you determine what is using up your available filesystem space?

What is the Rule of 17 concerning mapping devices to FAs?

How will you choose between synchronous and asynchronous replication for SRDF?

What is zoning/masking/mapping?

What EMC hardware have you worked on? (like DMX3/4 etc) --SAN

What Fabric Switch hardware have you worked on? (like Cisco9000, Brocade 3250 etc)

What is the function of msconfig in our system...?

1).what is forest? 2).what is dns and dhcp port no's? 3).what is file system? 4).what is terminal server?

Difference between parallel and serialo communication

not able to connect to SBI Visa payment server...Getting message like "Server not found"..."proxy protected by firewall"...how to resolve this issue?

What happens when two consigitive ports of switch are connacted using one cross cabel with each other?(how the whole network gets down)

Difference between Network and Networking ?

What is the benefit of Active Directory ?

What is the command to check how many port numbers are running with their specific protocols in linux pc