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Vishing

As explained in Acing the CCNA Exam: Volume 2 Advanced Networking and Security

Vishing is phishing conducted through voice telephone communication.

Vishing, or voice phishing, is phishing conducted over the phone. Attackers use deceptive calls to impersonate trusted entities and obtain sensitive information or induce actions. section 11.2.2

Fabricated IT password-reset call

An attacker claims to be from the IT department, cites company policy, and asks an employee to visit a URL, log in, and change a password. Authority and urgency increase the likelihood of compliance. section 11.2.2

Reduce exposure by:

  • Training users to recognize deceptive requests and respond appropriately. section 11.6
  • Raising awareness of potential social-engineering threats. section 11.6

How Acing the CCNA Exam: Volume 2 Advanced Networking and Security covers it

How deep it goes
Defines the technique and illustrates a pretexting scenario, without detailing call-handling procedures or technical controls.
Examples
Uses a fake IT password-reset call directing an employee to log in through a supplied URL.
What you can do after
Diagnose vishing attempts by recognizing deceptive callers, authority-based pretexts, and requests for sensitive actions.
How it connects
Connects vishing with phishing, smishing, spear phishing, whaling, pretexting, and social engineering.

Related concepts

This explainer was generated by Manning's knowledge graph from the text of Acing the CCNA Exam: Volume 2 Advanced Networking and Security. The section links point to the parts of the book it draws on.