What is port 9900

Registered Ports: through TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and that packets will be delivered in the same order in which they were sent. UDP ports use the Datagram Protocol. Like TCP, UDP is used in combination with IP the Internet Protocol and facilitates the transmission of datagrams from one computer to applications on another computer, but unlike TCP, UDP is connectionless and does not guarantee reliable communication; it's up to the application that received the message to process any errors and verify correct delivery.

This can be accomplished in both Windows command prompt and Linux variants using the "netstat -aon" command. For more detailed and personalized help please use our forums. Username: Password: forgot password? Home » Ports Database » Port Details. Port Details known port assignments and vulnerabilities. SG security scan: port TCP guarantees delivery of data and also guarantees that packets will be delivered on port in the same order in which they were sent.

Because protocol TCP port was flagged as a virus colored red does not mean that a virus is using port , but that a Trojan or Virus has used this port in the past to communicate. We do our best to provide you with accurate information on PORT and work hard to keep our database up to date. This is a free service and accuracy is not guaranteed. We do our best to correct any errors and welcome feedback! Your email address will not be published.

Besides the Web, other common applications of TCP include e-mail and file transfer. Among its management tasks, TCP controls message size, the rate at which messages are exchanged, and network traffic congestion. With UDP, computer applications can send messages, sometimes known as datagrams, to other hosts on an Internet Protocol IP network without requiring prior communications to set up special transmission channels or data paths.

The protocol was designed by David P. Reed in and formally defined in RFC All rights reserved.