Answer Description
Vishing (Voice Phishing) is a type of phishing attack that uses a telephone or VOIP call to trick an unsuspecting user into divulging important information. Xmas Attack, MAC Spoofing and DDoS are not examples of social engineering, but are malicious attacks.
Wikipedia
Voice phishing is a form of criminal phone fraud, using social engineering over the telephone system to gain access to private personal and financial information for the purpose of financial reward It is sometimes referred to as 'vishing' - a portmanteau of "voice" and phishing Landline telephone services have traditionally been trustworthy terminated in physical locations known to the telephone company, and associated with a bill-payer Now however, vishing fraudsters often use modern Voice over IP (VoIP) features such as caller ID spoofing and automated systems (IVR) to make it difficult for legal authorities to monitor, trace or block Voice phishing is typically used to steal credit card numbers or other information used in identity theft schemes from individuals
Voice_phishing - Wikipedia, the free encyclopedia