CISSP · Question #181
CISSP Question #181: Real Exam Question with Answer & Explanation
The correct answer is C: Use of Network Access Control (NAC) on switches.. Implementing VoIP requires careful network security and access control considerations, with NAC being critical to ensure only authorized and properly configured devices can access the voice network infrastructure.
Question
Which of the following is a MAJOR consideration in implementing a Voice over IP (VoIP) network?
Options
- AUse of a unified messaging.
- BUse of separation for the voice network.
- CUse of Network Access Control (NAC) on switches.
- DUse of Request for Comments (RFC) 1918 addressing.
Explanation
Implementing VoIP requires careful network security and access control considerations, with NAC being critical to ensure only authorized and properly configured devices can access the voice network infrastructure.
Common mistakes.
- A. Unified messaging is an application-layer feature that integrates voicemail and email but is not a fundamental network infrastructure consideration when implementing VoIP.
- B. While VLAN separation for voice traffic is a best practice, it is a design recommendation rather than a 'major consideration' at the level of security enforcement that NAC provides during implementation.
- D. RFC 1918 private addressing is standard practice for internal networks and is not specific to VoIP implementation; VoIP networks can function with any IP addressing scheme and this is not a unique or major VoIP concern.
Concept tested. Network Access Control for VoIP security enforcement
Reference. https://learn.microsoft.com/en-us/security/zero-trust/deploy/networks
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