Exam N10-008 topic 1 question 824 discussion

It was on my exam (April 25th, 2024). I chose 'IPsec' in the exam, but it seems 'ESP' could be the answer according to the IBM's documentation - https://www.ibm.com/docs/en/zos/2.4.0?topic=ipsec-ah-esp-protocols Please someone confirms the correct answer of this question.

IPSec (Internet Protocol Security) is a suite of protocols designed to secure IP communications by providing data confidentiality, data integrity, and authentication. It can be used in conjunction with other protocols, such as AH (Authentication Header) and ESP (Encapsulating Security Payload), to ensure both authentication and encryption. ESP (Encapsulating Security Payload): ESP provides data confidentiality (encryption) and optional authentication but is typically used in conjunction with other protocols like IKE for a complete VPN solution. Thus, IPSec is the best choice as it encompasses both confidentiality and authentication, typically using ESP for these functions. That is my take on it atleast.

ChatGPT Advanced Networking Tutor: "To establish a site-to-site VPN tunnel that provides both data confidentiality (encryption) and authentication, the best choice is: ESP (Encapsulating Security Payload) Explanation: IPSec is a framework of protocols that provides security services for IP networks, including encryption, authentication, and integrity. IPSec itself can use different protocols to achieve these goals. ESP (Encapsulating Security Payload), which is part of the IPSec suite, is specifically designed to provide data confidentiality through encryption as well as authentication and integrity. ESP encrypts the payload of the packet and can also include authentication of the entire packet (except for the IP header in transport mode). AH (Authentication Header), another protocol in the IPSec suite, provides authentication and integrity but does not provide encryption (data confidentiality). It only authenticates the packet and ensures it hasn't been tampered with, but it doesn't encrypt the data. Thus, ESP is the best choice for a protocol that allows both data confidentiality and authentication when establishing a site-to-site VPN tunnel."

ESP stands for **Encapsulating Security Payload**. It is a component of the IPsec (Internet Protocol Security) suite used to provide confidentiality, data integrity, and authentication of IP packets. ESP encrypts the payload and encapsulating headers of each packet, protecting the data from eavesdropping and tampering during transmission. It can operate in two modes: transport mode, which only encrypts the payload, and tunnel mode, which encrypts the entire IP packet. C

ESP is the likely answer. The question asked for the protocol and ESP is the only one in IPsec that does authorization and encryption (confidentiality). AH is the other security protocol in IPsec and it does authorization but not encryption. IPsec is a suite of protocols. IKE is key management.

IPSec is more accurately a suite of protocols, ESP the protocol within IPSec that authorizes and encrypts data. The question states a singular protocol must be the right answer.

IPSec most likely