End Google Ads 201810 - BS.net 01 --> can someone explain if i need to use all the three lines of code mentioned below to disable the cache in a page.actually if i am using only Response.CacheControl = "no-cache" then also page is working properly.then what is the use of another two line..and also is it a server side cache or client side?

Response.CacheControl = "no-cache"
Response.AddHeader("Pragma", "no-cache")
Response.Expires = -1