Answers

Question and Answer:

  Home  Networking Protocols

⟩ Why DNS use both TCP and UDP ports. And for which purpose it uses TCP and UDP?

DNS uses TCP for Zone Transfer over Port: 53

DNS uses UDP for DNS Queries over Port: 53

A client computer will always send a DNS Query using UDP

Protocol over Port 53. If a client computer does not get

response from a DNS Server, it must re-transmit the DNS

Query using the TCP after 3-5 seconds of interval.

 203 views

More Questions for you: