What are the differences between WCF and ASMX Web Services?

ASMX is:

• easy and simple to write and configure
• only available in IIS
• only callable from HTTP

WCF can be:

• hosted in IIS, a Windows Service, a Winforms application, a console app – you have total freedom
• used with HTTP (REST and SOAP), TCP/IP, MSMQ and many more protocols