• Standard way of describing a service via WSDL
  
  
• Standard message interchange via SOAP.
  
  
• Discovery occurs through UDDI registry - not a dynamic network of peers.
  
  
• Central registry for publishing services
• Service broker that maintains the registry
• Service requestor that uses the borker to find services

Web Services rely heavily on centralized servers running services. However, the client side is free to discover and use a variety of services. Web Services appear somewhat P2P like, but there is no dynamic network and thus, for the time being remains largely server-reliant.

Web Services seem to be a reasonable complimentary platform with P2P applications requiring centralized services (more later).