The primary reason to choose FortiWeb Cloud over FortiWeb VM is its Software-as-a-Service (SaaS) model. With FortiWeb Cloud, Fortinet manages the entire infrastructure, including deployment, software updates, scaling, and availability. This significantly simplifies the initial setup and reduces ongoing operational overhead for the organization. The customer can focus on configuring application security policies rather than managing the underlying virtual machine and its environment, leading to a faster time-to-value and lower total cost of ownership (TCO) for teams without dedicated infrastructure management resources.

A. Gaining full control over the VM and network configuration is the primary reason to choose FortiWeb VM, not the SaaS-based FortiWeb Cloud.

C. Offline sniffing is a deployment mode available for the FortiWeb VM/appliance, which requires direct network integration. FortiWeb Cloud operates as a cloud-based reverse proxy.

D. The bring-your-own-license (BYOL) model is an option for FortiWeb VM. FortiWeb Cloud is a subscription-based service with its own distinct pricing model.

1. FortiWeb™ Cloud Datasheet: "FortiWeb Cloud is a cloud-native SaaS solution... It simplifies the delivery and protection of your web applications... Fortinet handles all the infrastructure deployment, software updates, and availability so you can focus on the security of your applications." (Page 1, "Highlights" section). This document directly supports the concepts of simplified deployment and offloaded infrastructure management.

2. FortiWeb Cloud 24.1.a Getting Started Guide: The deployment process described involves signing up, adding an application domain, and changing a DNS record to redirect traffic. This contrasts with the more complex process of deploying a VM. (Section: "Onboarding your application"). This highlights the simplicity of deployment.

3. FortiWeb 7.4.0 Administration Guide: This guide details the various complex deployment modes for the FortiWeb appliance/VM, such as Reverse Proxy, True Transparent Proxy, and Offline Protection. (Chapter: "Deployment", Section: "How to choose a deployment mode"). The existence of these complex, self-managed modes for the VM offering reinforces that simplicity is the key differentiator for the Cloud offering.