How does Encapsulating Security Payload (ESP) in transport mode affect the Internet Protocol (IP)?

The correct answer is B. Encrypts and optionally authenticates the IP payload, but not the IP header. Encapsulating Security Payload (ESP) in transport mode affects the Internet Protocol (IP) by encrypting and optionally authenticating the IP payload, but not the IP header. ESP is a protocol that provides confidentiality, integrity, and authentication for data transmitted over a

Submitted by carlos_mx· Mar 5, 2026Communication and Network Security

Question

How does Encapsulating Security Payload (ESP) in transport mode affect the Internet Protocol (IP)?

Options

AEncrypts and optionally authenticates the IP header, but not the IP payload
BEncrypts and optionally authenticates the IP payload, but not the IP header
CAuthenticates the IP payload and selected portions of the IP header
DEncrypts and optionally authenticates the complete IP packet

How the community answered

(29 responses)

B
90% (26)
C
7% (2)
D
3% (1)

Explanation

Encapsulating Security Payload (ESP) in transport mode affects the Internet Protocol (IP) by encrypting and optionally authenticating the IP payload, but not the IP header. ESP is a protocol that provides confidentiality, integrity, and authentication for data transmitted over a network. ESP can operate in two modes: transport mode and tunnel mode. In transport mode, ESP only protects the data or payload of the IP packet, while leaving the IP header intact and visible. This mode is suitable for end-to-end communication between two hosts. In tunnel mode, ESP protects the entire IP packet, including the header and the payload, by encapsulating it within another IP packet. This mode is suitable for gateway-to-gateway or host-to-gateway communication

Topics

#IPsec#ESP#Transport mode#Network encryption

Community Discussion

No community discussion yet for this question.

Full CISSP Practice