NET-SNTP-CLIENT-P-P1-SINGLE is a uC/SMTP Simple Network Time Protocol client module with single product license. It is an add on application layer protocol to uC/TCP-IP. The Simple Network Time Protocol is a protocol used to synchronize computer clock times in a computer network. SNTP uses Universal Time Coordinated (UTC) to synchronize computer clocks to the millisecond, and sometimes to a fraction of a millisecond.