שאלה | How does a Web Cache (Proxy Server) improve user experience, and does it affect every request?

How does a Web Cache (Proxy Server) improve user experience, and does it affect every request?

		It reduces delay only for "hits" by satisfying requests from a local server and reducing traffic on the access link.
		It reduces delay for all requests because it increases the physical speed of the internet connection.
		It reduces delay for all requests by compressing the data before it leaves the origin server.
		It only reduces delay for objects that are larger than 10MB to save bandwidth.