Separate lists of TCP and UDP ports can be given bypreceding the lists with T: (for TCP) or U:. This example scansthree TCP ports (FTP, Telnet, and POP3), and four UDP services (DNS,rpcbind, NetBIOS, and SNMP). Specifying both TCP and UDP ports onlymatters if you also tell Nmap to do a UDP scan (-sU)and one of the TCP scan methods, such as -sS,-sA, or-sF.