#scan if TCP port 5060 is open on server 10.20.30.40
nmap -sT 10.20.30.40 -p 5060
#scan if UDP port 5060 is open on server 10.20.30.40
nmap -sU 10.20.30.40 -p 5060
#scan if TCP and UDP port 5060 are open on server 10.20.30.40
nmap -sTU 10.20.30.40 -p 5060