Which activity involves finding target systems on a network, looking for openings in their operating systems and available network services, and exploiting them remotely to assess internal networks or DMZ security?

• A. Network Services Test
• B. Network Sweeping
• C. Network Infrastructure Firewall Concerns
• D. Network Tracing

Answer: (C)

The activity described is about actively assessing a network by locating target systems, identifying openings in their operating systems and services, and attempting remote access to test how well internal networks or a DMZ are protected. This aligns with a Network Services Test, which covers discovering hosts, enumerating OS and service details, and probing or exploiting vulnerabilities to evaluate security.

Why this fits better than the others: simply sweeping for live hosts stops at discovery and does not involve testing or exploiting services. Tracing maps the path packets take to a destination, not the security of the hosts or services themselves. Firewall-related concerns focus on how traffic is controlled by network devices, rather than performing exploitation against endpoints to gauge potential breach paths.

In practice, you’d conduct this with explicit authorization, and you’d use controlled steps like host discovery, port/service enumeration, version/resource fingerprinting, and then safe, legal exploitation attempts to assess risk and DMZ exposure.