ITPEC FE Subject A April 2025 Question 24
ITPEC FE Subject A April 2025 — Question 24 of 60
OSI Network Layer — responsible for routing datagrams using IP addresses across networks.
The Network layer (Layer 3) handles:
- Routing packets between different networks
- Logical addressing (IP addresses)
- Path determination across multiple hops
Why not others:
- (a) Data link — handles MAC addressing and frame delivery within a single local network segment (Layer 2)
- (c) Physical — transmits raw bits over physical media (Layer 1)
- (d) Transport — provides end-to-end communication between processes using port numbers (Layer 4), not inter-network routing
Key rule: If the question mentions routing + IP addresses + across networks, the answer is always Network layer.
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