Technical Interview Questions » NETWORKING Interview Questions

What is virtual path?

admin — Fri, 16 Mar 2007 13:31:47 +0000

Along any transmission path from a given source to a given destination, a group of virtual circuits can be grouped together into what is called path.

What is the difference between an unspecified passive open and a fully specified passive open?

admin — Fri, 16 Mar 2007 13:31:27 +0000

An unspecified passive open has the server waiting for a connection request from a client. A fully specified passive open has the server waiting for a connection from a specific client.

What is anonymous FTP and why would you use it?

admin — Fri, 16 Mar 2007 13:31:08 +0000

Anonymous FTP enables users to connect to a host without using a valid login and password. Usually, anonymous FTP uses a login called anonymous or guest, with the password usually requesting the user’s ID for tracking purposes only. Anonymous FTP is used to enable a large number of users to access files on the host without having to go to the trouble of setting up logins for them all. Anonymous FTP systems usually have strict controls over the areas an anonymous user can access.

Difference between bit rate and baud rate?

admin — Fri, 16 Mar 2007 13:30:46 +0000

Bit rate is the number of bits transmitted during one second whereas baud rate refers to the number of signal units per second that are required to represent those bits. baud rate = bit rate / N where N is no-of-bits represented by each signal shift.

What are the important topologies for networks?

admin — Fri, 16 Mar 2007 13:30:27 +0000

BUS topology:

In this each computer is directly connected to primary network cable in a single line.

Advantages:

Inexpensive, easy to install, simple to understand, easy to extend.

STAR topology:

In this all computers are connected using a central hub.

Advantages:

Can be inexpensive, easy to install and reconfigure and easy to trouble shoot physical problems.

RING topology:

In this all computers are connected in loop.

Advantages:

All computers have equal access to network media, installation can be simple, and signal does not degrade as much as in other topologies because each computer regenerates it.

What is the range of addresses in the classes of internet addresses?

admin — Fri, 16 Mar 2007 13:29:45 +0000

Class A 0.0.0.0 - 127.255.255.255
Class B 128.0.0.0 - 191.255.255.255
Class C 192.0.0.0 - 223.255.255.255
Class D 224.0.0.0 - 239.255.255.255
Class E 240.0.0.0 - 247.255.255.255

What protocol is used by DNS name servers?

admin — Fri, 16 Mar 2007 13:29:21 +0000

DNS uses UDP for communication between servers. It is a better choice than TCP because of the improved speed a connectionless protocol offers. Of course, transmission reliability suffers with UDP.

What is Bandwidth?

admin — Thu, 15 Mar 2007 14:01:04 +0000

Every line has an upper limit and a lower limit on the frequency of signals it can carry. This limited range is called the bandwidth.

What is External Data Representation?

admin — Thu, 15 Mar 2007 14:00:44 +0000

External Data Representation is a method of encoding data within an RPC message, used to ensure that the data is not system-dependent.

What is frame relay, in which layer it comes?

admin — Thu, 15 Mar 2007 14:00:22 +0000

Frame relay is a packet switching technology. It will operate in the data link layer.