Which item represents a secure method of transmitting fault data with Cisco Call Home?

Smart Call Home is an automated support capability that monitors Cisco devices on your network. It flags issues and initiates resolution before your business operations are affected. Smart Call Home is included with many Cisco service contracts, including Cisco SMARTnet®, Smart Net Total Care, Partner Support Service, Smart Care, and Mission Critical Support Service.

The Transport Gateway is an optional software package that can be downloaded and installed to enable the Call Home environment to securely send messages to Smart Call Home via the Transport Gateway. The transport gateway software can be installed on a Windows or Linux server. The transport gateway receives HTTP messages or emails from various devices or retrieves messages from a local email inbox and then forwards these messages to Smart Call Home