DCN_Unit1_Set1

Out of the following topologies, which is the one with (i) least traffic problems, (ii) most robustness and (iii) most security?

• Star topology

• Mesh Topology

• Bus Topology

• Ring Topology

For a network of 10 nodes connected in star topology along with central controller hub, ____________ connection links are required to fully connect given network and __________ ports are required on each node

• 45, 1

• 45, 1

• 10, 9

• 10, 1

Which of the following data unit is encapsulated in a datagram?

• a segment

• a frame

• a message

• none of the given options

Which of the following OSI layer is responsible for reliable "hop-to-hop" delivery?

• Network Layer

• Data Link Layer

• Transport Layer

• Application Layer

Which of the following statements about circuit switching and packet switching is true?

• Circuit switching is more efficient than packet switching for handling large amounts of bursty data.

• In circuit switching, data is transmitted in discrete packets that follow different paths to the destination.

• Packet switching requires establishing a dedicated communication path before transmission.

• Packet switching allows multiple users to share the same network resources, whereas circuit switching reserves a dedicated path for each connection.

In the block diagram of a digital communication system, what is the primary function of the channel encoder?

• To amplify the transmitted signal for better reception

• To convert analog signals into digital signals

• To add redundancy for error detection and correction

• To filter out unwanted noise from the received signal

Which of the following correctly describes the role of syntax, semantics, and timing in network protocols?

• Syntax defines the order of messages, semantics specifies the physical medium used, and timing determines the encryption method.

• Syntax is responsible for error correction, semantics handles message delivery, and timing ensures that data is always transmitted at the same rate.

• Syntax refers to the structure and format of data, semantics defines the meaning of the exchanged data, and timing ensures proper synchronization of communication.

• Syntax specifies error detection methods, semantics governs data compression, and timing determines the routing path of packets.

Which protocol operates at the Transport Layer of the TCP/IP model?

• IP

• ARP

• UDP

• ICMP

Which type of network is confined to a small geographical area like an office or a building?

• LAN

• MAN

• WAN

• PAN

Which of the following network device comprises ONLY Physical layer, Data Link Layer and Network Layer?

• Hub

• Switch

• Router

• Repeater