Download basic networking interview questions and answers pdf for freshers and experienced which explain all networking concepts and commands ppt. Networking Interview Questions and Answers. 1. Define Network? A network is a set of devices connected by physical media links. A network is recursively is a. + Hardware And Networking Interview Questions and Answers, Question1: What is a node and links? Question2: What are the layers of the OSI reference.
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Top Networking Interview Questions & Answers. 1) What is a Link? A link refers to the connectivity between two devices. It includes the type of cables and. Networking Interview Questions updated on Apr 1. Define Network? A network is a set of devices connected by physical media links. A network is. Have you worked with building and maintaining networks? Rehearse interview questions out loud with a friend, family member, or your Career Advisor. The interviewer may answer that it's pretty laid-back or it's all business, or there's a.
A layer of a glass surrounding the center fiber of glass inside a fiber-optic cable. What are the protocols in application layer? A generic term for section of a large networks usually separated by a bridge or router. 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. Sundar D says:
Session Layer f. Presentation Layer g. Application Layer. Which layers are network support layers? Data link Layer and c. Network Layers.
Which layers are user support layers? Session Layer b. Presentation Layer and c. What is Pipelining? In networking and in other areas, a task is often begun before the previous task has ended. This is known as pipelining. What is Piggy Backing? A technique called piggybacking is used to improve the efficiency of the bidirectional protocols.
When a frame is carrying data from A to B, it can also carry control information about arrived or lost frames from B; when a frame is carrying data from B to A, it can also carry control information about the arrived or lost frames from A.
What are the two types of transmission technology available? 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 subnet? A generic term for section of a large networks usually separated by a bridge or router. What is MAC address? What is multiplexing? Multiplexing is the process of dividing a link, the phycal medium, into logical channels for better efficiency.
Here medium is not changed but it has several channels instead of one. What is simplex? It is the mode of communication between two devices in which flow of data is unidirectional.
What is half-duplex? It is the mode of communication between two devices in which flow of data is bi-directional but not at the same time. What is full duplex? It is the mode of communication between two devices in which flow of data is bi-directional and it occurs simultaneously. Here signals going in either direction share the capacity of the link. What is sampling?
It is the process of obtaining amplitude of a signal at regular intervals. What is Asynchronous mode of data transmission? It is a serial mode of transmission. In this mode of transmission, each byte is framed with a start bit and a stop bit.
There may be a variable length gap between each byte. What is Synchronous mode of data transmission? In this mode of transmission, bits are sent in a continuous stream without start and stop bit and without gaps between bytes. Regrouping the bits into meaningful bytes is the responsibility of the receiver. What are the different types of multiplexing? Multiplexing is of three types. Frequency division multiplexing and wave division multiplexing is for analog signals and time division multiplexing is for digital signals.
What are the different transmission media? The transmission media is broadly categorized into two types i Guided media wired i Unguided media wireless. What are the duties of data link layer? Data link layer is responsible for carrying packets from one hop computer or router to the next. The duties of data link layer include packetizing, adderssing, error control, flow control, medium access control. What are the types of errors? Errors can be categorized as a single-bit error or burst error.
A single bit error has one bit error per data unit. A burst error has two or more bits errors per data unit. What do you mean by redundancy? Redundancy is the concept of sending extra bits for use in error detection. Three common redundancy methods are parity check, cyclic redundancy check CRC , and checksum.
Define parity check.
In parity check, a parity bit is added to every data unit so that the total number of 1s is even or odd for odd parity. Simple parity check can detect all single bit errors. It can detect burst errors only if the total number of errors in each data unit is odd.
In two dimensional parity checks, a block of bits is divided into rows and a redundant row of bits is added to the whole block. Define cyclic redundancy check CRC. C RC appends a sequence of redundant bits derived from binary division to the data unit.
The divisor in the CRC generator is often represented as an algebraic polynomial. What is hamming code? The hamming code is an error correction method using redundant bits. The number of bits is a function of the length of the data bits. By rearranging the order of bit transmission of the data units, the hamming code can correct burst errors.
Define stop and wait ARQ. In stop and wait ARQ, the sender sends a frame and waits for an acknowledgement from the receiver before sending the next frame.
What do you mean by network control protocol? Network control protocol is a set of protocols to allow the encapsulation of data coming from network layer protocol that requires the services of PPP. What do you mean by CSMA?
To reduce the possibility of collision CSMA method was developed.
What do you mean by Bluetooth? It is a wireless LAN technology designed to connect devices of different functions such as telephones, notebooks, computers, cameras, printers and so on. What is IP address? The internet address IP address is 32bits that uniquely and universally defines a host or router on the internet. The portion of the IP address that identifies the network is called netid. The portion of the IP address that identifies the host or router on the network is called hostid.
It is the method used to solve the channel allocation problem. It is used for: It is of two types: Pure aloha 2. Slotted aloha. What is Firewalls? It is an electronic downbridge which is used to enhance the security of a network. What is Repeaters?
A receiver receives a signal before it becomes too weak or corrupted,regenerates the original bit pattern,and puts the refreshed copy back onto the link.
It operates on phycal layer of OSI model. What is Bridges? They divide large network into smaller components. They can relay frames between two originally separated LANs.
They provide security through partitioning traffic. They operate on physical and data link layer of OSI model. What is ICMP? It also handles both control and error messages. What is FDM?
FDM is an analog technique that can be applied when the bandwidth of a link is greater than the combined bandwidths of the signals to be transmitted. What is WDM? WDM is conceptually the same as FDM, except that the multiplexing and demultiplexing involve light signals transmitted through fiber optics channel. What is TDM? TDM is a digital process that can be applied when the data rate capacity of the transmission medium is greater than the data rate required by the sending and receiving devices.
List the steps involved in creating the checksum. Divide the data into sections b. Add the sections together using 1's complement arithmetic c.
Take the complement of the final sum, this is the checksum. Compare Error Detection and Error Correction: The correction of errors is more difficult than the detection. In error detection, checks only any error has occurred. In error correction, the exact number of bits that are corrupted and location in the message are known. The number of the errors and the size of the message are important factors. What are the protocols in application layer?
What are the protocols in transport layer? What do you mean by client server model? In client server model ,the client runs a program to request a service and the server runs a program to provide the service. These two programs communicate with each other. One server program can provide services to many client programs. TELNET is a client —server application that allows a user to log on to a remote machine,giving the user access to the remote system.
It is the main protocol used to access data on the World Wide Web.
It is so called because its efficiency allows its use in a hypertext environment where there are rapid jumps from one document to another. What is World Wide Web? World Wide Web is a repository of information spread all over the world and linked together.
It is a unique combination of flexibility,portability,and user-friendly features. The World Wide Web today is a distributed client-server service,in which a client using a browser can access a service using a server. The service provided is distributed over many locations called web sites.
A network is a set of devices connected by physical media links. A network is recursively is a connection of two or more nodes by a physical link or two or more networks connected by one or more nodes. At the lowest level, a network can consist of two or more computers directly connected by some physical medium such as coaxial cable or optical fiber.
Such a physical medium is called as Link. A network can consist of two or more computers directly connected by some physical medium such as coaxial cable or optical fiber. Such a physical medium is called as Links and the computer it connects is called as Nodes. A node that is connected to two or more networks is commonly called as router or Gateway. It generally forwards message from one network to another.
If the physical links are limited to a pair of nodes it is said to be point-point link. If the physical links are shared by more than two nodes, it is said to be Multiple Access. Current Affairs Interview Questions and Answers.