Symmetric key distribution with asymmetric encryption what are the applications of doing this?

Linda subscribes to a cloud service. the service provider hosts the cloud infrastructure and delivers computing resources over the internet.what cloud model is linda using

In which part of a professional email should you try to be brief, but highly descriptive?

What machine listens for http requests to come in to a website’s domain? a. a router b. a browser c. a server d. a uniform resource locator