Question 460
A restricted data center stores spare network devices. A technician proposes leaving the rack door unlocked because the equipment already has administrator passwords. What control is still necessary?
Explanation
Correct Answer
Physical possession can allow tampering, theft, hardware replacement or console access even when the device has management credentials. Locked racks and controlled access reduce that attack surface. Defense in depth uses both physical and logical controls rather than assuming one control removes all others.
Incorrect Answers
OSPF passive interfaces are routing configuration elements, not sensors or locks controlling room and rack entry.
DNS filtering does not prevent a person with physical access from taking or damaging network devices. The risk is at the premises.
Passwords protect selected logical operations but do not prevent theft or manipulation of exposed hardware. Physical access remains an independent security requirement.