What is the difference between Request.ServerVariables["REMOTE_ADDR"] and Request.UserHostAddress?

Question

What is the difference between Request.ServerVariables["REMOTE_ADDR"] and Request.UserHostAddress?

Are either of these variables considered unreliable with respect to IP Address spoofing?

Answer 1

The .ServerVariables is provided for compatibility with the old ASP method for getting that information. Most of the information provided through that is now provided through separate properties.