Can you explain the difference between 'OPTIONS' and 'HEAD' requests in the context of CORS?

OPTIONS requests are used to request specific headers from the server, while HEAD requests are used to retrieve the content of a resource. For CORS, OPTIONS requests are often used to request the `Access-Control-Allow-Origin` header, allowing the client to determine which domains are allowed to access the resource. HEAD requests are used to retrieve the resource's content directly, without the headers.