Q. Data which is routed between networks or from node to node within networks requires only the functions of OSI
When data is routed between networks or from node to node within networks, it primarily requires the following OSI layers:
- Layer 1: Physical Layer – deals with the actual physical connection (wires, cables, etc.).
- Layer 2: Data Link Layer – responsible for node-to-node data transfer, error detection, and correction.
- Layer 3: Network Layer – handles routing, addressing, and packet forwarding (like IP addressing and routing).
These three layers (1-3) are crucial for ensuring that data can be transmitted across different networks. Higher layers (4-7) focus on application, presentation, and session functions, which are not directly involved in basic data routing and transmission.
Explanation by: Mr. Dubey
When data is routed between networks or from node to node within networks, it primarily requires the following OSI layers:
- Layer 1: Physical Layer – deals with the actual physical connection (wires, cables, etc.).
- Layer 2: Data Link Layer – responsible for node-to-node data transfer, error detection, and correction.
- Layer 3: Network Layer – handles routing, addressing, and packet forwarding (like IP addressing and routing).
These three layers (1-3) are crucial for ensuring that data can be transmitted across different networks. Higher layers (4-7) focus on application, presentation, and session functions, which are not directly involved in basic data routing and transmission.