Internet users obtain internet access through an internet service provider (ISP). Djibouti Telecom is the sole provider of telecommunication services. A VoIP phone is necessary to connect to a VoIP service provider. Viettel is the largest telecommunications service provider in Vietnam. NordVPN is a personal virtual private network (VPN) service provider. Metadata ensures a secure transaction between an identity provider and a service provider. AT&T Inc. is the primary wired telephone service provider for the area. Its first commercial Internet service provider, PT. Some warranties require that repairs be undertaken by an authorized service provider. The user requests a web resource protected by a SAML service provider. Performance will vary depending on the Internet service provider (ISP). AXA PPP healthcare is a UK private medical insurance provider. The message flow begins with a request for a secured resource at the service provider. Any dispute involving parties like licensor, licensee, service provider and consumers are resolved by TDSAT. Vietel was the only VoIP service provider in Vietnam then.