Identify the ONE CORRECT matching between the OSI layers and their corresponding functionalities as shown.OSI Layers Functionalities (a) Network layer (I) Packet routing (b) Transport layer (II) Framing and error handling (c) Datalink layer (III) Host to host communication
OSI Layer Functions Explained
The Open Systems Interconnection (OSI) model is a conceptual framework used to understand and standardize the functions of a telecommunication or computing system in terms of its seven layers. Each layer performs specific tasks, building upon the services of the layer below it. This question requires matching three key OSI layers – the Network layer, Transport layer, and Data Link layer – with their primary functionalities.
Network Layer Functionalities
The Network Layer (Layer 3) is responsible for logical addressing and routing packets across different networks. It determines the best path for data transmission from the source to the destination system. This crucial function is known as (I) Packet routing.
Transport Layer Functionalities
The Transport Layer (Layer 4) provides end-to-end communication services for applications. It ensures that data is transferred reliably (or sometimes unreliably, depending on the protocol used) between the source and destination hosts. This includes tasks like segmentation, reassembly, flow control, and error control. Its core role is enabling seamless (III) Host to host communication.
Data Link Layer Functionalities
The Data Link Layer (Layer 2) handles data transfer across a single physical link connecting two directly connected nodes. Its responsibilities include framing data into packets (frames), physical addressing (using MAC addresses) for devices on the same network segment, and performing error detection and correction. This aligns with the functionality (II) Framing and error handling.
OSI Matching Analysis
By analyzing the functions of each layer:
- The Network layer (a) is responsible for Packet routing (I).
- The Transport layer (b) manages communication between end systems, matching Host to host communication (III).
- The Data link layer (c) handles the details of the physical link, including Framing and error handling (II).
Therefore, the correct matching is (a)-(I), (b)-(III), and (c)-(II).
| OSI Layer | Functionality | Description |
|---|---|---|
| Network Layer (a) | Packet routing (I) | Manages logical addressing and path determination across networks. |
| Transport Layer (b) | Host to host communication (III) | Ensures reliable end-to-end data delivery between applications. |
| Data Link Layer (c) | Framing and error handling (II) | Controls data transfer over a physical link, including framing and error checks. |
Important Questions from Concept of Layering
Every network adaptor has a unique identity in the form of a _______.
Match the following:
List - I
List - II
A. Data link layer
I. Encryption
B. Network layer
II. Connection control
C. Transport layer
III. Routing
D. Presentation layer
IV. Framing
Match List I with List II
List I
List II
(A) Serial Line IP (SLIP)
(I) Application layer)
(B) Border Gateway Protocol (BGP)
(II) Transport layer
(C) User Data Protocol (UDP)
(III) Data Link layer
(D) Simple Network Management
(IV) Network layer
Choose the correct answer from the options given below:
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:
Match List I with List II
List I List II A. Data Link Layer I. True end‐to‐end layer B. Network Layer II. Token Management C. Transport Layer III. Produce billing information D. Session Layer IV. Piggybacking Choose the correct answer from the options given below :
