CREST Practitioner Security Analyst (CPSA) Practice

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What service does port 159 correspond to?

SQL Server
Directory Location Service
Simple Network Paging Protocol
Gateway Access Control Protocol

The correct answer is: SQL Server

The service associated with port 159 is the Simple Network Paging Protocol (SNPP). This protocol is used primarily for pagers and is designed for sending messages to one or several pagers over TCP/IP networks. SNPP allows users to send short messages effectively, making it particularly valuable in environments where quick communication is essential, such as within healthcare or service-oriented industries. Although SQL Server is a widely used database management system, it typically operates on port 1433 for its default instance. The other options listed, such as the Directory Location Service and Gateway Access Control Protocol, do not correspond to port 159 either; therefore, it's crucial to connect port numbers accurately with their respective services for a better understanding of network communications and protocols.