title: TCP connection and firewalls
body: <blockquote>
    <p>On the Internet, if you need fast,
    secure server-to-server communication,
    and you can specify which ﬁrewall
    ports are open,  NetTcpBinding can
    prove very valuable.</p>
  </blockquote>
  
  <p>a) Is text implying that with some other connection protocols, such as HTTP, we don't need to check for open firewall ports?</p>
  
  <p>b) Why would <code>NetTcpBinding</code> only be useful for server-to-server communications, but not for client-to-server communications?</p>
  
  <p>thank you</p>