Networking Interview Questions and Answers (55) - Page 1

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What is subnet?

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

What is RIP (Routing Information Protocol)

It is a simple protocol used to exchange information between the routers.

What is SLIP (Serial Line Interface Protocol)?

It is a very simple protocol used for transmission of IP datagrams across a serial line.

It one of two sublayers of the data link layer of OSI reference model, as defined by the IEEE 802 standard.

This sublayer is responsible for maintaining the link between
computers when they are sending data across the physical network connection.

What is the range of IP address?

IP addresses are divided into five classes as below.

Class A: 0.0.0.0 - 126.255.255.255(Can work with a network of very large hosts.)
Class B: 128.0.0.0 - 191.255.255.255(Can work in medium sized networks)
Class C: 192.0.0.0 - 223.255.255.255(Used in small LANs)
Class D: 224.0.0.0 - 239.255.255.255(Used for multicasting)
Class E: 240.0.0.0 - 254.255.255.255(Reserved for experimental purpose)

What is Bandwidth?

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 MAC address?

It is 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.

What is RAID?

It is a method for providing fault tolerance by using multiple hard disk drives.

What is point-to-point protocol?

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

What is OSI reference model?

OSI(Open System Interconnection) is a network communication standard developed by ISO.

What are the different layers of OSI model?

OSI model has 7 layers such as,
7.Application
6.Presentation
5.Session
4.Transport
3.Network
2.Datalink
1.Physical

What do you mean by network communication standards?

Network communication standards are certain rules and specifications framed by standard organisations for manufacturing network hardware and developing network software.

Major communication standards have been formed by the organisations like ISO, IEEE etc.

What is difference between baseband and broadband transmission?

In a baseband transmission, the entire bandwidth of the cable is consumed by a single signal.

In broadband transmission, signals are sent on multiple frequencies, allowing multiple signals to be sent simultaneously.

What is Beaconing?

The process that allows a network to self-repair networks problems is called Beaconing.

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(Fibre Distributed Data Interface) networks.

What is attenuation?

Attenuation is the degeneration or weakening of a signal over distance on a network cable. To avoid attenuation amplifiers or repeaters and short cables are used.

What is silly window syndrome?

It is a problem that can affect TCP performance. This problem occurs when data are passed to the sending TCP entity in large blocks, but an interactive application on the receiving side reads only 1 byte at a time.

What is TCB(Transmission Control Block)?

A TCB is a complex data structure that contains informations about each connection.

What is a routing table?

A routing table contains the path information for data data packets to reach a particular inter-network. Basically this table consists of the following information,
Network ID, Subnet Mask, Gateway Address, Interface(port), and netric(hops or number of gaps between two internetworking devices).

Routers add entries to routing table with the help of routing protocols.

What are the commonly used routing protocols?

Routers add entries to routing table with the help of routing protocols. The commonly used routing protocols are,

Routing Information Protocol(RIP):-
It is used to advertise the current status and information in the routing table, including the routes to the rest of the routers in every 30 seconds.

Open Shortest Path First(OSPF):-
It is used to determine the shortest path, otherwise known as the lowest cost path among the nodes of different networks.