Can TCP and UDP sockets use the same port?

Question

First of all, is there any problem with using both UDP and TCP on the same server?

Secondly, can I use the same port number?

Answer 1

Firstly,there is no problem using both tcp and udp on the server.

Secondly,we can have both UDP and TCP requests on same port ,because each request is identified by a quintuple contained by source IP ,Destination IP, Source Port, Destination Port, PROTOCOL(as protocol can be TCP or UDP).