Network Layer Handles Logical Addressing | Generated by AI
Question: Which layer of the OSI model is responsible for logical addressing and routing?
Answer:
The correct answer is C) Network Layer.
Explanation:
The OSI (Open Systems Interconnection) model consists of seven layers, each with specific responsibilities:
- Physical Layer (Layer 1): Handles the transmission of raw bits over a physical medium (e.g., cables, signals).
- Data Link Layer (Layer 2): Provides node-to-node data transfer, error detection, and physical (MAC) addressing.
- Network Layer (Layer 3): Responsible for logical addressing (e.g., IP addresses) and routing (determining the best path for data packets across networks). Key protocols include IP, ICMP, and routing protocols like OSPF or BGP.
- Transport Layer (Layer 4): Ensures end-to-end reliable data delivery, segmentation, and flow control (e.g., TCP, UDP).
Logical addressing (such as IPv4/IPv6 addresses) and routing functions are exclusively handled at the Network Layer, making option C the correct choice. Option B is incorrect because the Data Link Layer uses physical (MAC) addresses, not logical ones, and does not perform routing across networks.