Networking Interview Questions And Answers for freshers and experienced

(i) Broadcast and (ii) point-to-point

A generic term for section of a large networks usually separated by a bridge or router.

Transmission is a physical movement of information and concern issues like bit polarity, synchronisation, clock etc. Communication means the meaning full exchange of information between two communication media.

(i) Simplex (ii) Half-duplex (iii) Full-duplex. .

Series of interface points that allow other computers to communicate with the other layers of network protocol stack.

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

Telnet is also called as terminal emulation. It belongs to application layer.

The process that allows a network to self-repair networks problems. The stations on the network notify the other stations on the ring when they are not receiving the transmissions. Beaconing is used in Token ring and FDDI networks.

Redirector is software that intercepts file or prints I/O requests and translates them into network requests. This comes under presentation layer.

NETBIOS is a programming interface that allows I/O requests to be sent to and received from a remote computer and it hides the networking hardware from applications. NETBEUI is NetBIOS extended user interface. A transport protocol designed by microsoft and IBM for the use on small subnets.

A method for providing fault tolerance by using multiple hard disk drives.

When the computers on the network simply listen and receive the signal, they are referred to as passive because they don’t amplify the signal in any way. Example for passive topology - linear bus.

Hybrid devices that combine the features of both bridges and routers.

No. minimum spanning tree of a graph give the shortest distance between any 2 specified node Minimal spanning tree assures that the total weight of the tree is kept at its minimum. But it doesn’t mean that the distance between any two nodes involved in the minimum-spanning tree is minimum.

A layer of a glass surrounding the center fiber of glass inside a fiber-optic cable.

A communications protocol used to connect computers to remote networking services including Internet service providers.

A gateway operates at the upper levels of the OSI model and translates information between two completely different network architectures or data formats

The degeneration of a signal over distance on a network cable is called attenuation.

The address for a device as it is identified at the Media Access Control (MAC) layer in the network architecture. MAC address is usually stored in ROM on the network adapter card and is unique.

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.

Signals are usually transmitted over some transmission media that are broadly classified in to two categories.
a) Guided Media: These are those that provide a conduit from one device to another that include twisted-pair, coaxial cable and fiber-optic cable. A signal traveling along any of these media is directed and is contained by the physical limits of the medium. Twisted-pair and coaxial cable use metallic that accept and transport signals in the form of electrical current. Optical fiber is a glass or plastic cable that accepts and transports signals in the form of light.
b) Unguided Media:
This is the wireless media that transport electromagnetic waves without using a physical conductor. Signals are broadcast either through air. This is done through radio communication, satellite communication and cellular telephony.