CompTIA Security+ (SY0-601) — Question 300

A cybersecurity analyst at Company A is working to establish a secure communication channel with a counterpart at Company B, which is 3,000 miles (4,828 kilometers) away. Which of the following concepts would help the analyst meet this goal in a secure manner?

Answer options

• A. Digital signatures
• B. Key exchange
• C. Salting
• D. PPTP

Correct answer: B

Explanation

The correct answer is B, Key exchange, as it is essential for securely establishing shared keys for encryption between the two parties. Digital signatures (A) are used for verifying authenticity, not for establishing a secure communication channel. Salting (C) is a technique related to password security, and PPTP (D) is a type of VPN protocol, but it does not directly address the secure key establishment needed for communication.