Which of the following BEST describes the concept of persistence in the context of penetration testing?
A . The capability of maintaining service availability during a sustained DDoS attack providing persistent service
B . The property of a system used by penetration testers to exploit long-running network connections
C . The state where an attacker can interact with a network host’s Internet-facing resources at will
D . The ability of an attacker to retain access to a system despite the best efforts to dislodge an attacker.
Answer: D