Acquisition refers to the process of capturing and preserving digital evidence in a forensically sound, non-alterable format (e.g., bit-for-bit imaging or write-once storage), ensuring the integrity of the emails for later analysis.

Hashing generates a unique, fixed-length digest of the original software package using a one-way cryptographic function. The developer publishes the expected hash value, and users compute the hash of the downloaded file and compare it to the published value. If the values match, it confirms the software has not been altered during distribution, ensuring integrity.

Given the scenario where an Intrusion Detection System (IDS) has detected a high rate of SQL injection attacks and the perimeter firewall is at capacity, the best action would be to set the appliance to Intrusion Prevention System (IPS) mode and place it in front of the company firewall.
This approach has several benefits:
Intrusion Prevention System (IPS): Unlike IDS, which only detects and alerts on malicious activity, IPS can actively block and prevent those activities. Placing an IPS in front of the firewall means it can filter out malicious traffic before it reaches the firewall, reducing the load on the firewall and enhancing overall security.
Reducing Traffic Load: By blocking SQL injection attacks and other malicious traffic before it reaches the firewall, the IPS helps maintain the firewall's performance and prevents it from becoming a bottleneck.
Enhanced Security: The IPS provides an additional layer of defense, identifying and mitigating threats in real-time.

Side loading is the process of installing software outside of a manufacturer's approved software repository. This can expose the device to potential vulnerabilities, such as malware, spyware, or unauthorized access. Side loading can also bypass security controls and policies that are enforced by the manufacturer or the organization. Side loading is often done by users who want to access applications or features that are not available or allowed on their devices.