Systems Security Certified Practitioner (SSCP) — Question 132

At which OSI/ISO layer is an encrypted authentication between a client software package and a firewall performed?

Answer options

• A. Network layer
• B. Session layer
• C. Transport layer
• D. Data link layer

Correct answer: C

Explanation

The correct answer is C, the Transport layer, as it is responsible for end-to-end communication and securing data transmission through encryption. The other layers do not provide this level of secure communication; for example, the Network layer focuses on routing, while the Data link layer deals with physical addressing.