An MDM platform can detect devices that have been jailbroken and enforce policies - such as blocking access or wiping the device - to prevent compromised, unsupported mobile operating systems from accessing organizational resources.

Code signing uses cryptographic digital signatures to confirm the integrity and authenticity of software code. It ensures that the code has not been altered after being signed, providing assurance that the application is trustworthy.

A hot site is a fully operational mirror of the primary data center, maintained in real time and ready to take over operations immediately if the primary site experiences an outage.

The security engineer is likely to deploy a Web Application Firewall (WAF) to protect the new web portal service. A WAF specifically protects web applications by filtering, monitoring, and blocking HTTP requests based on a set of rules. This is crucial for preventing common attacks such as SQL injection, cross-site scripting (XSS), and other web-based attacks that could compromise the web service.
* Layer 4 firewall operates primarily at the transport layer, focusing on IP address and port filtering, making it unsuitable for web application-specific threats.
* NGFW (Next-Generation Firewall) provides more advanced filtering than traditional firewalls, including layer 7 inspection, but the WAF is tailored specifically for web traffic.
* UTM (Unified Threat Management) offers a suite of security tools in one package (like antivirus, firewall, and content filtering), but for web application-specific protection, a WAF is the best fit.