210-250 · Question #122
Which protocols is primarily supported by the 3rd layer of the OSI ref models ?
The correct answer is C. Ipv4/IPv6. Layer 3 of the OSI model is the Network layer, which is responsible for logical addressing and routing - functions performed by IPv4 and IPv6.
Question
Which protocols is primarily supported by the 3rd layer of the OSI ref models ?
Options
- AHTTP/TLS
- BATM/MPLS
- CIpv4/IPv6
- DTCP/UDP
How the community answered
(26 responses)- A8% (2)
- B4% (1)
- C88% (23)
Why each option
Layer 3 of the OSI model is the Network layer, which is responsible for logical addressing and routing - functions performed by IPv4 and IPv6.
HTTP operates at Layer 7 (Application layer) and TLS operates at Layer 5/6 (Session/Presentation layer), neither of which is Layer 3.
ATM (Asynchronous Transfer Mode) maps to Layer 2 (Data Link) and MPLS is often considered Layer 2.5, sitting between Layer 2 and Layer 3 - not purely Layer 3.
IPv4 and IPv6 operate at Layer 3 (the Network layer) of the OSI reference model, providing logical addressing (IP addresses) and routing between different networks. Routers operate at this layer to forward packets based on IP addressing. These protocols are the foundational Layer 3 protocols used in modern networks.
TCP and UDP are Layer 4 (Transport layer) protocols responsible for end-to-end communication and segmentation, not Layer 3.
Concept tested: OSI model Layer 3 Network layer protocols
Source: https://learningnetwork.cisco.com/s/article/osi-model-reference-chart
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