Which term refers to the points where a network or application receives external connections or inputs that could be exploited by attackers?

Which term refers to the points where a network or application receives external connections or inputs that could be exploited by attackers?

• A. attack surface
• B. port security
• C. VLAN
• D. IP

Answer: (A)

The key idea is the attack surface—the set of points where a system can receive external input or connections that attackers could abuse. This includes open ports and services, web interfaces, APIs, and any user input surfaces. Because these entry points are where vulnerabilities can be exploited, understanding and minimizing the attack surface is central to hardening a system: disable unnecessary services, close unused ports, implement strong input validation and authentication, and monitor for suspicious activity. The other terms don’t describe the whole idea: port security focuses on restricting access on specific network ports, VLANs are about sequestering network segments, and IP is just an addressing scheme.

The key idea is the attack surface—the set of points where a system can receive external input or connections that attackers could abuse. This includes open ports and services, web interfaces, APIs, and any user input surfaces. Because these entry points are where vulnerabilities can be exploited, understanding and minimizing the attack surface is central to hardening a system: disable unnecessary services, close unused ports, implement strong input validation and authentication, and monitor for suspicious activity. The other terms don’t describe the whole idea: port security focuses on restricting access on specific network ports, VLANs are about sequestering network segments, and IP is just an addressing scheme.