A(n) service is one that protects a system to ensure its availability and addresses the security concerns raised by denial- of- service attacks

a) replay
b) availability
c) masquerade
d) integrity

d. integrity

Explanation:

Integrity in computing simply means that a system's performance, its digital information that it holds are maintained, assured and not altered without authorization.

An integrity service will protect a system by ensuring its availability and addressing security concerns raised by cyber attacks such as denial-of-service attacks.

Integrity service will keep track of the state of a system ensuring that it is performing its intended and instructed functions without being interrupted, damaged or disrupted by changes in it surrounding environment. Integrity service is one of the concepts used in cloud computing in a paradigm that is called Data Integrity as a Service in the cloud (DIaaS).