Q54 — Computer Networks

Computer Networks

Q54. Marks: +2.0 UGC NET Paper 2: Computer Science 8th Oct 2022

Match List I with List II:

List I		List II
(A)	Physical layer	(I)	Routing of the signals divide the outgoing message into packets. to act as network controller for routing data
(B)	Data link layer	(II)	Make and break connections, define voltages and data rates, convert data bits into electrical signal
(C)	Network layer	(III)	Synchronization, error detection and correction. To assemble outgoing message into frames.
(D)	Presentation layer	(IV)	It works as a translating layer

Choose the correct answer from the options given below:

1.(A) - (IV), (B) - (III), (C) - (II), (D) - (I)

2.(A) - (II), (B) - (III), (C) - (IV), (D) - (I)

3.(A) - (IV), (B) - (III), (C) - (I), (D) - (II)

4.(A) - (II), (B) - (III), (C) - (I), (D) - (IV) ✓ Correct

Solution

Correct answer is Option 4

Explanation:

Physical Layer: This layer is responsible for the physical connection between devices, including the cables, connectors, and physical characteristics of the transmission medium. It defines the physical specifications of the network, such as voltage levels, data rates, and the type of cable used.
Data Link Layer: The data link layer provides reliable communication between two nodes on the same physical network. It is responsible for packetizing data, error detection and correction, flow control, and media access control. This layer ensures that data is transmitted without errors and is properly received by the destination device.
Network Layer: The network layer provides logical addressing and routing of data between different networks. It decides how data packets are routed from the source to the destination, based on the network topology and traffic conditions. It also provides services such as fragmentation and reassembly of packets.
Transport Layer: The transport layer ensures the reliable delivery of data between end systems. It provides end-to-end data transfer services such as flow control, error correction, and congestion control. It also ensures that data is transmitted in the correct order, and provides mechanisms for retransmission of lost packets.
Session Layer: The session layer establishes, manages, and terminates communication sessions between applications on different devices. It provides services such as authentication, authorization, and synchronization of data flow between applications.
Presentation Layer: The presentation layer ensures that data is presented in a format that is meaningful to the application layer. It handles data encryption, decryption, compression, and translation between different data formats.
Application Layer: The application layer provides services to end-user applications, such as email, file transfer, and web browsing. It interacts directly with software applications and provides protocols for high-level services such as data transfer, remote file access, and email management.

📄 All “Computer Networks” questions across papers

← Previous 6 / 16 in this subject • Back to paper Next →

🏷 Change Tag for this Question ▶