Ethical Hacking Essentials Practice Test

Which port number is commonly used by trojans such as Silencer and WebEx?

1. 1001

2. 25565

3. 12345

4. 8080

The correct answer is: 1001

The commonly used port number for trojans like Silencer and WebEx is indeed 1001. Trojans often exploit specific port numbers to communicate with attackers or to receive commands. Port 1001 has been associated with various malware types due to its tendency to be left open on many systems, making it a target for trojans. Understanding the significance of port numbers is crucial in cybersecurity, as different services and applications typically use designated ports; however, attackers can use unexpected or less well-known ports to bypass security measures. In this case, 1001's association with certain trojans highlights the need for monitoring and securing systems against unauthorized traffic using this port. Other options listed, while they may represent ports used for different services or applications, do not share the same association with trojans like Silencer and WebEx specifically.