Q1. What is a network? Mention advantages of networking.
Ans. A collection of interconnected computers is called a Computer Network. Two computers or devices are said to be interconnected if they are capable of sharing and exchanging information with each other by following a protocol.
Advantages of Computer Networks :-
• Resource sharing
• Improved communication
• Reduced communication cost
• Reliability of data
• Central storage of data
Q2. What are Different types of network?
Ans. Networks vary in size, complexity, and geographical spread. Thus networks can be classified as :- PAN, LAN, MAN, WAN.
Q3. Differentiate between LAN and WAN.
Ans. Local Area Network:- The local area network (LAN) is a network which is designed to operate over a small physical area such as an office, factory or a group of buildings up to a few kilometers in size. LANs use a transmission technology consisting of a cable. Traditional LANs technology transmits at speeds of 10 Mbps to 100 Mbps and makes very few errors. However, current LANs technology transmits at up to 10 Gbps. The personal computers and workstations in the offices are interconnected via LAN to share resources. The resources to be shared can be hardware like a printer, modem, disk or softwares or data, programs.
Wide Area Network:- A wide area network (WAN) is a telecommunications network that extends over a large geographical area across countries and continents. WANs are used to connect LANs and other types of networks together so that users and computers in one location can communicate with users and computers in other locations. They facilitate efficient exchange of information at high speed and low cost. A WAN uses common careers like satellite systems , telephone lines etc. the best known example of WAN is Internet.
Q4. Differentiate between Wired and wireless media/channel?
Ans. Wired Network/ Media :- Wired or Guided media are also known as physical or conducted media. These media use various types of cables e.g. Twisted Pair Cable, Coaxial Cable and Fibre Optic Cable for transmitting data over various networks.
Wireless Network/ Media:- In a wireless network devices are connected without using a physical medium. Wireless communication uses radiowaves, microwaves, satellite and other short frequency waves like infrared to transmit data.
Q5. Explain Client server architecture?
Ans. In this architechture, the data is stored on powerful computers called servers. Often, these are centrally housed and maintained by a system administrator. In contrast the employees have simpler machines, called clients, on their desks, with which they access remote data. This whole arrangement is called the client-server architecture.
Q6. What is cloud computing?
Ans. Cloud computing is a technology which provides information resources and capacities to multiple customers through internet. It allows storing, accessing data and programs using the internet. Cloud computing provide users to store and process data in their privately owned space( called as cloud). There are broadly two types of clouds one can access : Public Cloud and Private Cloud.
Q7. Explain Internet of Things(IoT).
Ans. Internet of things is a network of physical object or “things” embedded with electronics, software, sensors and network connectivity, which enables these objects to collect and exchange data. A thing is an entity or physical object that has a unique identifier, an embedded system and the ability to transfer data over a network. For example heart monitoring system, biochip transponders on farm animals, automobiles with built in sensors, DNA analysis device and other wearables, etc.
Q8. Differentiate b/w switch and hub.
Ans. Switch:- Switch is a device that is used to segment networks into different subnetworks called subnets or LAN segments. It is responsible for filtering and forwarding the message between LAN segments. A switch is an intelligent hub. It looks exactly like a hub but the difference between two is that a switch sends the information selectively to the intended computer while hub transmits the data to all the computers or nodes connected to it.
HUB:- A hub is a connecting device which connects multiple computers together to form a Local Area Network(LAN). A hub contains multiple ports into which cables from multiple computer’s NICs are inserted. Whenever a computer has to send some information to some other computer the information is sent by the NIC to hub. Hub then retransmits this information to other computers attached to it. The computers for which information is intended receives and accepts it and other computers just reject it.
Q9. Explain wireless Access Point.
Ans. This device allows a wireless connection to a wired network using the Wi-Fi standard. A wifi card is either an internal or external local area network adapter with built-in wireless radio and antenna. It is used in desktop computer to establish internet connection. They are also called as wireless fidelity cards.
Q10. What is network stack?
Ans. A set of network protocol layers that work together. The term stack also refers to the actual software that processes the protocols. it is an implementation of a computer networking protocol suite or protocol family. The suite is the definition of the communication protocols and the stack is the software implementation of them.