8 Comments on “Which of the following protocols uses both TCP and UDP ports?”

1. mohamed rani says:

   March 29, 2013 at 4:12 pm

   DNS

   
   
   
   0

   
   
   
   0
2. IT Engineer says:

   August 25, 2013 at 2:03 pm

   DNS can use either the User Datagram Protocol (UDP) or Transmission Control Protocol (TCP) with a destination port of 53.

   Note:

   +Simple Mail Transfer Protocol (SMTP) is specified for mail transport and uses TCP port 25.
   + Telnet uses TCP on port 23.
   + File Transfer Protocol (FTP) uses TCP on port 20, 21.
   + Trivial File Transfer Protocol (TFTP) uses UDP on port 69.
   + HTTP Secure (HTTPS) uses TCP on port 443.

   
   
   
   0

   
   
   
   0