Explain the requirement of ASP.NET web services?

Answer:

The ASP.NET web services are used for B2B applications like authorizing employees, supplier, signing of invoice etc. These web services are the way to expose the middle tier components through internet. With the help of these components, you can communicate across the firewalls as they use SOAP as a transport protocol which helps to transmit structured data using HTTP channel. The default port is 80 through which we can easily transfer message. The web services are platform independent.