Explanation The given answer includes the main actions performed by a packet filter in the Linux operating system. This process ensures that the person is who they say they are, preventing unauthorized access and potential security breaches. Explanation The correct answer is the non-use of encryption systems in general and the use of outdated encryption systems. This can include threats such as hacking, data breaches, identity theft, and cyber attacks. In a DMZ, the exposed network is typically isolated from the internal network and serves as a buffer zone between the public and private networks.
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