Which topology requires a multipoint connection?

A. Ring
B. Bus
C. Star
D. Mesh

Explanation: In bus topology, there is a single cable to which all the network nodes are connected. So whenever a node tries to send a message or data to other nodes, this data passes through all other nodes in the network through the cable. It is really simple to install but it’s not secure enough to be used in most of the computer network applications.

Which of the following maintains the Domain Name System?

A. A single server
B. A single computer
C. Distributed database system
D. None of the mentioned

Explanation: A domain name system is maintained by a distributed database system. It is a collection of multiple, logically interrelated databases distributed over a computer network.

Which layer is responsible for process to process delivery in a general network model?

A. Session layer
B. Data link layer
C. Transport layer
D. Network layer

Explanation: The role of Transport layer (Layer 4) is to establish a logical end to end connection between two systems in a network. The protocols used in Transport layer is TCP and UDP. The transport layer is responsible for segmentation of the data. It uses ports for the implementation of process-to-process delivery.

What does each packet contain in a virtual circuit network?

A. Only source address
B. Only destination address
C. Full source and destination address
D. A short vc number

Explanation: A short VC number also called as VCID (virtual circuit identifier) is a type of identifier which is used to distinguish between several virtual circuits in a connection oriented circuit switched network. Each virtual circuit is used to transfer data over a larger packet switched network.

What is the term for the data communication system within a building or campus?

A. MAN
B. LAN
C. Pan
D. WAN

Explanation: LAN is an abbreviation for Local Area Network. This network interconnects computers in a small area such as schools, offices, residence etc. It is the most versatile kind of data communication system where most of the computer network concepts can be visibly used.

What was the name of the first network?

A. Asapnet
B. Arpanet
C. Cnnet
D. Nsfnet

Explanation: ARPANET stands for Advanced Research Projects Agency Networks. It was the first network to be implemented which used the TCP/IP protocol in the year 1969.

Which of the following is the network layer protocol for the internet?

A. Hypertext transfer protocol
B. File transfer protocol
C. Ethernet
D. Internet protocol

Explanation: There are several protocols used in Network layer. Some of them are IP, ICMP, CLNP, ARP, IPX, HRSP etc. Hypertext transfer protocol is for application layer and ethernet protocol is for data link layer.

Which network topology requires a central controller or hub?

A. Ring
B. Bus
C. Star
D. Mesh

Explanation: In star topology, no computer is connected to another computer directly but all the computers are connected to a central hub. Every message sent from a source computer goes through the hub and the hub then forwards the message only to the intended destination computer.

If a link transmits 4000 frames per second, and each slot has 8 bits, what is the transmission rate of the circuit using Time Division Multiplexing (TDM)?

A. 500kbps
B. 32kbps
C. 32bps
D. 500bps

Explanation: Transmission rate= frame rate * number of bits in a slot. Given: Frame rate = 4000/sec and number of bits in slot = 8 Thus, Transmission rate = (4000 * 8) bps = 32000bps = 32kbps

Which of the following allows LAN users to share computer programs and data?

A. File server
B. Network
C. Communication server
D. Print server

Explanation: A file server allows LAN users to share computer programs and data. It uses the File Transfer Protocol to provide this feature on ports 20 and 21. The file server works as a medium for the transfer.