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Which of the following security techniques would be BES…

A large multinational corporation with networks in 30 countries wants to establish an understanding of their
overall public-facing network attack surface. Which of the following security techniques would be BEST suited
for this?

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External penetration test

Internal vulnerability scan

External vulnerability scan

Internal penetration test

In this question, we need to determine the public-facing network attack surface. We therefore need to perform
a vulnerability scan from outside the network; in other words, an external vulnerability scan.
A vulnerability scan is the automated process of proactively identifying security vulnerabilities of computing
systems in a network in order to determine if and where a system can be exploited and/or threatened. While
public servers are important for communication and data transfer over the Internet, they open the door to
potential security breaches by threat agents, such as malicious hackers.
Vulnerability scanning employs software that seeks out security flaws based on a database of known flaws,
testing systems for the occurrence of these flaws and generating a report of the findings that an individual or an
enterprise can use to tighten the network’s security.
Vulnerability scanning typically refers to the scanning of systems that are connected to the Internet but can also
refer to system audits on internal networks that are not connected to the Internet in order to assess the threat of
rogue software or malicious employees in an enterprise.

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