A new version of the primary operating system used by a company has been released.
Due to some significant changes in the OS, a system administrator wants to see which remotely accessible services are enabled by default to assess the security risk prior to upgrading to the new version.
Which of the following utilities should the administrator use?
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A. B. C. D.B.
The correct answer is B. Port scanner.
A port scanner is a utility used to discover which ports on a system are open and listening for connections. Ports are the endpoints for communication between network-connected devices, and different services use different ports to communicate.
When a service is enabled on a system, it typically listens on a specific port for incoming connections. By using a port scanner, the system administrator can determine which ports are open and which services are running. This information can then be used to assess the security risk of the system prior to upgrading to the new version of the operating system.
Option A, Cipher program, is a tool used to encrypt or decrypt files or directories. It does not provide information on remotely accessible services.
Option C, Telnet client, is a program used to connect to remote servers using the Telnet protocol. While it can be used to test remote accessibility, it does not provide information on which services are enabled by default.
Option D, Packet sniffer, is a tool used to capture and analyze network traffic. While it can be used to identify which services are running on a network, it is not the best tool for this purpose as it requires capturing and analyzing all network traffic, which can be time-consuming and inefficient.