Marcellus wants to ensure that his organization has sufficient capacity to handle the failure of a web server. What type of technology could he deploy to ensure that individual web server failures are handled gracefully without using an overly complex solution?

A load balancer can help handle individual web server failures gracefully by moving load to the functioning web servers in a cluster. In scalable environments, this can also result in more servers being instantiated. Platform diversity helps to protect against failures or vulnerabilities in a single vendor, platform, or system. Multi-cloud systems could help in this case but are much more complex than required by the relatively simple need to handle an individual web server's failure. A warm site would be suited to a datacenter failure, not a single web server failing.