Differences
| Web Services | WCF Services |
|---|---|
| Web Service file will have a default extension of .Asmx file. | WCF Service file will have a default extension of .Svc file. |
| Web Service does not Provide good security | WCF provides good security. |
| Web Service does not have control over the service classes. | WCF Service will have control over the classes. |
| Web Service supports only one hosting, i.e. at IIS only. | WCF supports multiple hosting options like managed environment, windows services, IIS, and in WAS. |
| Web Service is not reliable and flexible. | WCF is most reliable and flexible. |
| Web service execution performance is very slow. | WCF's Execution performance is fast. |
| Web Service does not support the transaction. | WCF Services supports Transactions. |
| Web Service supports only HTTP Communication. | Supports HTTP, TCP, MSMQ, and other communications. |
| Web Service does not support the cryptographic security. | WCF supports the cryptographic security. |