SSCP · Question #1205
IPSEC resides at which layer of the OSI model?
The correct answer is B. Layer 3 - Network. IPsec (Internet Protocol Security) provides security services such as authentication and encryption for IP traffic and operates at Layer 3, the Network layer, of the OSI model.
Question
IPSEC resides at which layer of the OSI model?
Options
- ALayer 6 - Presentation
- BLayer 3 - Network
- CLayer 4 - Transport
- DLayer 5 - Session
- ELayer 2 - Data Link
- FLayer 1 - Physical
How the community answered
(61 responses)- A2% (1)
- B90% (55)
- C2% (1)
- D2% (1)
- F5% (3)
Why each option
IPsec (Internet Protocol Security) provides security services such as authentication and encryption for IP traffic and operates at Layer 3, the Network layer, of the OSI model.
Layer 6 (Presentation) is responsible for data translation and encryption/decryption for the application layer, not network-level packet security.
IPsec operates at Layer 3, the Network Layer, of the OSI model, providing security services directly to the Internet Protocol (IP). It encrypts and authenticates IP packets, securing communication at the network level before they are passed to the transport layer.
Layer 4 (Transport) handles end-to-end communication and data segmentation, exemplified by TCP and UDP, but IPsec functions below this layer.
Layer 5 (Session) establishes, manages, and terminates communication sessions between applications.
Layer 2 (Data Link) provides node-to-node data transfer and error correction from the physical layer.
Layer 1 (Physical) deals with the physical transmission of raw bit streams over a medium.
Concept tested: IPsec OSI layer
Source: https://learn.microsoft.com/en-us/windows/security/threat-protection/windows-firewall/ipsec-how-it-works
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