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Q: What is a network node? Does the failure of same can be the reason of entire network blockage
A network node is nothing but a device or in fact, a computer that is connected to a network and is responsible for performing one or more than one task. For example, a computer that is responsible for data storage can be considered as a node. A server can also be a node. Failure of a network node can cause interruption to the whole network. However, it actually depends on some important factors such as the way nodes are connected with each other and what exactly the task a node is performing on a network. In case it is a server itself, of course, the network blockage will be there.
Q: Name the types of networks that you know. On what factors their size depends on?
Well, there are three types of networks and they are Local Area Networks, Metropolitan Area Networks and Wide Area Networks. The size of a network depends on the overall number of PC or nodes that needs to be connected with each other. LAN is the smallest network. An example is a network in an organization. The largest network is Wide Area Network. An example is internet.
Q: Can you tell the best about you know regarding the term “Protocol?”
Well, every task has some rules and regulations that need to be focused post or prior to performing it. Networking also has some fixed and variables rules that depend on a lot of factors and its necessary to follow them. These rules are generally regarded as protocols. Without following the network protocols, it is not possible to assure working of a network.
Q: What do you mean by the term IP conflict in networking?
IP stands for Internet Protocol. It is actually the physical address of a computer or a device on a network. For security and other reasons, the IP for every device is different. However, sometimes two or more devices reflect similar IP address and this causes interruption on a network. Such a scenario is considered as IP conflict.
Q: What exactly you know about the Mesh topology? What are the pros and cons associated with it?
Topology is a way that describes how devices are connected with each other on a network. On a network, devices can be connected with each other through various methods. The direct connection of every device with another is regarded as Mesh topology. The biggest advantage of this approach is data can be sent faster and failure of one node doesn’t affect other. However, the biggest disadvantage is cost. Also, it is not possible in case of larger networks.
Q: How well can you define a computer network?
It is basically an approach of connecting various computers or devices with each other to share software, hardware, and data through a medium between them. The medium can be wired or wireless. Ina network, basically there is no strict upper limit on the distance between two computers. Even those which are placed at different corners of the globe can communicate with each other.
Q: Can you name the elements of a network?
The elements of a network are Sender, Receiver, A communication medium (also known as a channel), Operating systems, Protocols and other networking devices.
Q: How server-based networks are different from peer to peer networks?
In server-based networks, there are a number of devices connected and all are centrally controlled and governed by a powerful server. The disadvantage of this approach is the failure of a server can result in failure of the entire network. However, the chances for this are less if server is properly maintained. On the other side, in peer to peer approach, every device or computer acts as a server for others. Failure of one computer doesn’t affect the working of other.
Q: What is bit rate control? Which layer of networking model controls the same?
The bit-rate is nothing but the speed at which the data transfer takes place between the devices connected to a network. Physical Layer is responsible for controlling the same.
Q: What do you know about the framing in a network?
One of the prime reasons for creating a network is nothing but sharing the data. When the same is required, the transfer of data is done in a manner that no loss of data occurs as it can lead to risks on the network’s security. Thus, information is divided into frames before it is sent on a network. The process of converting of information into smaller groups is known as framing. It has several benefits such as in case of failure of reception, the network doesn’t need to send the entire data again. Only the lost packet can be sent again and this avoids load on a network.
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Q: What benefits does switching offers in a network?
Networks generally have a very large number of devices as its parts. It is not always possible to create a direct link between the Pc which is sending data and the one which is receiving such as we download a file on a computer from another through World Wide Web. Switching is a technique that creates temporary paths between the computers to make data transfer more secure. The connection remains active during the time of transmission and gets terminated once data is sent.
Q: What are Routers? Name some UNICAST routing algorithms
These are specialized networking devices that decide the route or the path for the data that needs to be sent from one node to another on a network. In case of a complex or a large network, a computer itself can act as a router. There are some routing protocols that network layer decides and ensure reliable movement of information in a network. The UNICAST routing algorithms are:
1. Shortest Path routing
2. Flow based routing
3. Distance vector routing
6. Hierarchical Routing
Q: Name the models of network computing that you know?
There are three main networks computing models and they are:
1. Collaborative Computing
2. Centralized Computing
3. Distributed Computing
Q: What we call the combination of IP and Port address?
It is called socket address.
Q: What do you know about a situation called as congestion in a network? What are the principles of Congestion control?
It is basically a situation when the network is too busy or operates too slowly due to large number of requests on the servers by the clients. Such a situation also becomes the reason of slower performance of websites and software. It can be compared to a situation when a small road contains too many cars. There are two important principles and they are:
1. Open Loop Solutions
2. Closed Loop Solutions
Q: What do you know about the sliding window protocol?
It maintains a hypothetical window on the buffer exactly where the application stores the bytes before sending and on buffer before receiving application. The sliding of both these windows is responsible for controlling and managing the traffic from both a sender and a receiver. The size of window at the sender must not be larger than the size of window at the receiver end.
Q: What is process to process delivery?
This process is generally carried by the transport layer on a networking model. It uses socket address to perform its task and it defines a particular application on host with more than one applications.
Q: What is domain name system in networking? What is its significance?
A network is a combination of a very large number of computers and each is having its own IP address in either binary or number form which are in its. Of course, it is not possible to remember the name of all of them. With domain name system, a very reliable and easier method of defining these addresses can be assured. It generally defines the user friendly addresses which are easier to convert to actual IP very simply.
Q: What are modulators and demodulators?
These are basically the devices which play a vital role in making the data transmission on a network very easy. Modulators convert the data or information into digital form from analog so that it can easily be transported on a network. The demodulator performs the reverse task and i.e. it converts the digital information back to the analog. Modulators are used in senders while demodulators are a part of receiver.
Q: Name the algorithms that are used for Congestion Control?
Admission control, Load Shedding, Traffic shaping and Choke Packets are some of the algorithms for congestion control.
Q: What do you mean by FTP?
It stands for File Transfer Protocol and is designed for client-server model for transferring the files between different computers. Over the World Wide Web, there are lots of FTP servers which are having huge information in the form of files. Users who want to access them needs to connect their PC with such servers and can begin downloading.
Q: What do you mean by the term subnetting? How it is different from supenetting?
It is basically an approach that divides a network into several other sub-networks in such a way that each of these subnets has its own address. On the other hand, supernetting is totally opposite to subnetting which is considered in case of Class A and Class B address while supernetting is considered in case of class C addresses.
Q: What does IPV 6 stands for? How long it is
It means Internet Protocol Version 6. It is basically 128 bits long and is capable to provide 296 more unique addresses.
Q: What are network core protocols?
It is basically a series of server routines that are designed to satisfy the requests coming from various applications. NCP server include printer access, file access, accounting security, synchronization,
Q: What are the advantages of IDSN technology?
IDSN is basically a new set of protocols that is making networking more superior. It is trusted, as well as a secure approach to consider. It has faster data transfer rates. As compare to other similar approaches, its overall cost is very less. Also, it offers symmetrical transfer rates and is governed by excellent set of standards.
Q: What do you mean by a HUB? What are its types?
A hub is basically a concentrating point for a computer network. It offer central data point for network cabling. Most of the Local Area Networks in the present scenario are dependent on hubs for interconnecting of devices with each other. Hubs are generally of three types and they are Active, Passive and Intelligent hubs.
Q: What are the jobs and responsibilities of a network administrator?
Network administration is basically an approach that that consists of a lot of tasks. A network administrator is responsible for:
1. Hardware management
2. Server management
3. Data Backups
4. User account management
5. System maintenance
6. Software installation
8. System Monitoring
Q: Name the common encryption approaches used for network security?
>> Substitution encryption
>> Transposiotional Encryption
>> Encoding and Decoding
Q: What is IEEE? Do you think they have a role in Computer Networking?
IEEE stands for Institute of Electrical & Electronics Engineers. It is basically an organization having a team of Engineers and experts who are responsible for managing the standards for all the devices that are tagged as electrical and in the electronics category.
Q: What is attenuation? How can it be avoided?
Attenuation is a situation when the overall strength of signal becomes too weak and networks often fail to perform their task. It is possible to avoid this problem with networking devices such as signal repeaters as they regenerate the same and prevent them from being loss when it needs to be sent over a long distance.