Service blades must be attached to a Security Gateway. A Security Gateway is a device that enforces security policies on traffic that passes through it. A service blade is a software module that provides a specific security function, such as firewall, VPN, IPS, etc. A Security Gateway can have one or more service blades attached to it, depending on the license and hardware capabilities. The other options are incorrect. A management container is a virtualized environment that hosts a Security Management Server or a Log Server. A management server is a device that manages security policies and distributes them to Security Gateways. A Security Gateway container is not a valid term in Check Point terminology. References: [Check Point R81 Security Management Administration Guide], [Check Point R81 CloudGuard Administration Guide]