Difference webservice and wcf

Web service was the old traditional way to exposing the business logic and functionality to outside world through HTTP protocol. Microsoft has introduces new way to exposes into outside world not only through the HTTP protocol but also TCP, Remoting etc.It is proving high security and reliable messaging. 

Finding below the Difference  between WebService and WCF service.

SNO	Type	Web Service	WCF
1	Consume By	web services support only HTTP	WCF supports HTTP, TCP, MSMQ, NamedPipes.
2.	Hosting	web services can be hosted only in IIS	WCF service has all the following hosting options: a. IIS b. WAS (Windows Process Activation Services) c. Console Application d. Windows NT Services e. WCF provided Host
3.	Security	Webservice security is limited, it provide authentication and authorization is done using IIS and ASP.NET security configuration and transport layer security.	it supports many of the same capabilities as IIS and WS-* security protocols, additionally, it provides support for claim-based authorization that provides finer-grained control over resources than role-based security.
4.	Threading	It doesn’t support the multithreading	It support multithreading via ServiceBehaviour Class
5.	Serialization	web services uses XmlSerializer for serialization	WCF uses DataContractSerializer which is far better in performance than XmlSerializer
6.	Supports	It Support SOAP and XML	It support different types of Bindings like WSHttpBinding, BasicHttpBinding, MSMQBinding etc.
7	Transaction	It doesn’t support Transaction	It supports atomic and distributed transactions.
8	Proxy Class Creation	Uses the Command line tool WSDL.EXE to generate the client for the service.	Use serviceMetaData tool (svcutil.exe) to generate the client for service.