_______ is the oldest phone hacking techniques used by hackers to make free calls
A. Phishing
B. Spamming
C. Phreaking
D. Cracking
Answer:C
_______ is the oldest phone hacking techniques used by hackers to make free calls
A. Phishing B. Spamming C. Phreaking D. Cracking
Explanation: Phreaking which is abbreviated as phone-hacking is a slang term and old hacking technique where skilled professionals study, explore & experiment telephone networks in order to acquire the free calling facility.