Networking Basics Questions and Answers

Answer: A

Correct answer: personal area network

A PAN covers the space immediately around a person, typically within about ten metres, and Bluetooth is its most familiar technology - connecting a headset, keyboard or fitness tracker to a phone or computer. A LAN spans a building or campus, a WAN a country or the world, and a VPN is a logical network tunnelled over a public one rather than a matter of physical range.

Answer: C

Explanation: A router is a networking device that forwards data packets between computer networks. Routers perform the traffic directing functions on the Internet. They make use of routing protocols like RIP to find the cheapest path to the destination.

Answer: B

Explanation: A protocol stack refers to a group of protocols that are running concurrently that are employed for the implementation of network protocol suite. Each layer in the network model has to use one specific protocol from the protocol stack.

Answer: A

Explanation: Network congestion occurs when traffic in the network is more than the network could handle. To avoid network congestion, the network management uses various open-loop and closed-loop congestion control techniques.

Answer: B

Explanation: A virtual private network extends a private network across a public network, and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network.VPN provides enhanced security and online anonymity to users on the internet. It is also used to unblock websites which are unavailable in certain regions.

Answer: B

Correct answer: distributed system

The defining property of a distributed system is transparency: the collection of independent machines presents itself to the user as one coherent system, and the middleware hides where the processing and storage actually happen. A computer network makes no such promise - the user is aware of the separate machines and addresses them individually. Every distributed system runs on a network, but not every network is a distributed system.

Answer: A

Correct answer: a process in one device is able to exchange information with a process in another device

Networking is defined by the ability to exchange information, not by any similarity between the machines. Two devices are networked when a process on one can communicate with a process on the other, whatever their hardware, operating systems or process identifiers. Process IDs are local to each machine and carry no meaning across a network, and both devices running a process is neither necessary nor sufficient.

Answer: D

Correct answer: overlay network

An overlay network is a logical network constructed on top of another, its links being paths through the underlying network rather than physical connections. Peer-to-peer file sharing systems, virtual private networks and content distribution networks are the common examples. It permits new services without any change to the infrastructure, at the cost of routing decisions made in ignorance of the real topology below.

Answer: D

Correct answer: all of the mentioned

A node is any device attached to the network that participates in communication, whether it originates the data, forwards it on the way, or receives it as the final destination. The term is deliberately general - hosts, routers and switches are all nodes - and the role a given node plays changes from one message to the next.

Answer: A

Correct answer: broadcast network

In a broadcast network a single communication channel is shared by every machine, so a frame sent by one is received by all and each decides from the address field whether the frame is meant for it. Classic Ethernet on a hub and wireless LANs work this way, which is why they need a media access control method. Unicast and multicast describe the intended set of recipients of a particular transmission, not how the channel itself is arranged.