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Viva Questions for Computer Network

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Q1) What is a computer network?

A1) A computer network is a collection of interconnected devices that can communicate and share resources.

Q2) What are some common network devices?

A2) Common network devices include routers, switches, hubs, and modems.

Q3) Describe the difference between circuit-switched networks and packet-switching networks.

A3) Circuit-switched networks establish a dedicated path for the entire duration of a call, while packet-switching networks break data into packets that are independently routed.

Q4) What are the main network types, and what do they stand for?

A4) LAN (Local Area Network), MAN (Metropolitan Area Network), and WAN (Wide Area Network).

Q5) What is the OSI reference model, and how many layers does it have?

A5) The OSI model has seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

Q6) How does the TCP/IP model differ from the OSI model?

A6) The TCP/IP model combines the OSI model's physical and data link layers into one, resulting in four layers: Network Interface, Internet, Transport, and Application.

Q7) Explain the concept of network topology.

A7) Network topology refers to the physical or logical layout of devices and connections in a network, such as bus, star, ring, or mesh.

Q8) What is the role of a network switch in a LAN?

A8) A network switch is a device that connects devices within a LAN and forwards data packets only to the intended recipient.

Q9) What is the difference between a LAN and a WAN?

A9) A LAN covers a small geographical area, like a home or office, while a WAN spans larger areas, such as cities or even countries.

Q10) Define NAT in the context of networking.

A10) NAT (Network Address Translation) is a technique that allows multiple devices within a local network to share a single public IP address for accessing the internet.

Q11) How does the concept of virtual LAN (VLAN) work in networking?

A11) VLANs allow network segmentation, separating devices into logical groups even if they are on the same physical network.

Q12) What are the advantages of using a hub in a network?

A12) Hubs are simple devices that can connect multiple devices in a LAN, but they lack the intelligence to make data forwarding decisions.

Q13) Differentiate between full-duplex and half-duplex communication in networking.

A13) Full-duplex allows simultaneous two-way communication, while half-duplex only permits communication in one direction at a time.

Q14) What is the purpose of the OSI model's Presentation Layer?

A14) The Presentation Layer is responsible for data translation, encryption, and compression to ensure data compatibility between different systems.

Q15) Explain the role of ARP (Address Resolution Protocol) in networking.

A15) ARP is used to map an IP address to a MAC address, enabling data transmission within a local network.


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