N10-005 · Question #890
An IP address is encapsulated at which of the following layers of the OSI model?
The correct answer is C. Network. IP addresses are a Layer 3 (Network layer) construct, encapsulated into packets at that layer for routing between networks.
Question
An IP address is encapsulated at which of the following layers of the OSI model?
Options
- ATransport
- BData link
- CNetwork
- DApplication
How the community answered
(60 responses)- A3% (2)
- B2% (1)
- C88% (53)
- D7% (4)
Why each option
IP addresses are a Layer 3 (Network layer) construct, encapsulated into packets at that layer for routing between networks.
The Transport layer (Layer 4) encapsulates data into segments using port numbers (TCP/UDP), not IP addresses.
The Data Link layer (Layer 2) encapsulates data into frames using MAC addresses, not IP addresses.
The Network layer (Layer 3) is responsible for logical addressing using IP addresses, packet routing, and path determination. When data is encapsulated at Layer 3, the source and destination IP addresses are added to the packet header, enabling routers to forward the packet across different networks.
The Application layer (Layer 7) formats user data for applications and does not handle IP address encapsulation.
Concept tested: IP address encapsulation at OSI Network layer
Source: https://learn.microsoft.com/en-us/windows-server/networking/technologies/ipam/ipam-top
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