A Web cache or proxy server is a network entity that satisfies HTTP requests on the behalf of an origin Web server. Which of the following statement is not true?
a- A Web cache has its own storage and keeps copies of recently requested objects in this storage.
b- A user's browser can be configured so that all of the user's HTTP requests are first directed to a Web cache.
c- A Web cache will increase network traffic.
d- A Web cache is both a server and a client at the same time.