CompTIA Network+ Practice Test

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Prepare for the CompTIA Network+ Exam. Utilize flashcards and multiple choice questions with detailed hints and explanations. Equip yourself for success!

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Which of the following is one of the core protocols of IPsec?

Network Address Translation (NAT)
Authentication Header (AH)
Transport Control Protocol (TCP)
File Transfer Protocol (FTP)

The correct answer is: Authentication Header (AH)

The correct choice identifies the Authentication Header (AH) as one of the core protocols of IPsec. IPsec, or Internet Protocol Security, is a suite of protocols designed to secure internet protocol (IP) communications through authentication and encryption of each IP packet in a communication session. AH provides a way to authenticate the origin of the data and ensure its integrity by adding an authentication header to the packets. This ensures that the data has not been tampered with during transit and verifies the sender's identity, which is essential for establishing secure communications. Other protocols listed, such as Network Address Translation (NAT), are not part of the IPsec protocol suite. NAT is used for IP address management, facilitating the modification of IP address information in packet headers while in transit. Transport Control Protocol (TCP) and File Transfer Protocol (FTP) serve different purposes in the networking context; TCP is a transport layer protocol that provides reliable communication between devices, and FTP is an application layer protocol used for transferring files across a network. Neither directly contributes to the security functionality provided by IPsec.