Some important questions in computer networking

Some important questions

Q1. What do you mean by Network? …

A network consists of two or more computers that are linked in order to share resources (such as printers and CDs), exchange files, or allow electronic communications.

Q2. What do you mean by Node? …

A node is a basic unit of data structures. Any system or device connected to a network is also called nodes.

Q3. What do you mean by Network Topology?

A network topology is the arrangement of nodes -- usually switches, routers, or software switch/router features -- and connections in a network, often represented as a graph.

Q4. What is Routers? …

A router is a networking device that forwards data packets between computer networks.

Q5. What is the OSI model? …

OSI Model. OSI stands for Open System Interconnection is a reference model that describes how information from a software application in one computer moves through a physical medium to the software application in another computer.

Q6. Explain the Different layers of the OSI model?

1. Physical layer:- The physical layer is the first layer of the Open System Interconnection Model (OSI Model). The physical layer deals with bit-level transmission between different devices and supports electrical or mechanical interfaces connecting to the physical medium for synchronized communication.

2. Data link layer:- Data Link Layer. ... It makes sure the appropriate physical protocol is assigned to the data. The data link layer is the second layer in the OSI Model. The three main functions of the data link layer are to deal with transmission errors, regulate the flow of data, and provide a well-defined interface to the network layer.

3. Network layer:- The network Layer controls the operation of the subnet. The main aim of this layer is to deliver packets from source to destination across multiple links (networks).

4. Transport layer:- The network Layer controls the operation of the subnet. The main aim of this layer is to deliver packets from source to destination across multiple links (networks).

5. Session layer:- the session layer is the fifth layer, which controls the connections between multiple computers. ... This layer establishes, controls and ends the sessions between local and remote applications.

6. Presentation layer:- The presentation layer is layer 6 of the 7-layer Open Systems Interconnection (OSI) model. It is used to present data to the application layer (layer 7) in an accurate, well-defined and standardized format. The presentation layer is sometimes called the syntax layer.

7. Application layer:- The application layer is a layer in the Open Systems Interconnection (OSI) seven-layer model and in the TCP/IP protocol suite. It consists of protocols that focus on process-to-process communication across an IP network and provides a firm communication interface and end-user services.

Q7. Describe Hub, Switch and Router?

Hub:- hub is the most basic networking device that connects multiple computers or other network devices together.

Switch:- A network switch (also called switching hub, bridging hub, officially MAC bridge) is networking hardware that connects devices on a computer network by using packet switching to receive and forward data to the destination device.

Router:- A router is a networking device that forwards data packets between computer networks. Routers perform the traffic directing functions on the Internet.