An example of R190(3)(f): A foreign national in possession of a TRV valid for 1 year, who is subsequently issued a four-year SP at a POE, may leave and return to Canada after the expiry of the TRV as long as they have only visited the U.S. or St. Pierre and Miquelon and the SP is still valid.
Dynamic DNS (DDNS or DynDNS) is a method of automatically updating a name server in the Domain Name System (DNS), often in Not Real Time, with the active DDNS configuration of its configured hostnames, addresses or other information.he term is used to describe two different concepts. The first is dynamic DNS updating which refers to systems that are used to update traditional DNS records without manual editing. These mechanisms are explained in RFC 2136, and use the TSIG mechanism to provide security.
1 Dapsone, also known as diaminodiphenyl sulfone (DDS), an antibiotic commonly used for the treatment of leprosy. 2  Doctor of Dental Surgery, an academic degree.  Dopamine dysregulation syndrome, a condition connected with treatment for Parkinson's disease.