CREST Practitioner Security Analyst (CPSA) Practice

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Which protocol is associated with port 190?

  1. Internet Key Exchange

  2. Gateway Access Control Protocol

  3. Novell Netware over IP

  4. Apple QuickTime

The correct answer is: Gateway Access Control Protocol

The correct association of port 190 is with the Gateway Access Control Protocol (GACP). This protocol plays a role in managing the access control for multimedia gateways, particularly in VoIP (Voice over Internet Protocol) environments. GACP is significant because it helps in establishing, managing, and terminating sessions for voice communications. By operating on port 190, GACP can effectively communicate with other network entities, ensuring that appropriate access controls are in place as voice traffic traverses through a network. In contrast, other protocols listed are associated with different ports. For example, the Internet Key Exchange is associated with port 500, used primarily for securing IPsec connections. Novell Netware over IP has its respective ports for handling file and print services, and Apple QuickTime uses different ports related to streaming multimedia content. Each of these protocols serves distinct functions and operates on specific ports outside of the Gateway Access Control Protocol's designation at port 190.

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