The Cisco CCIE Service Provider (CCIE SP) certification validates expert level skills required of a Network Engineer to configure, build, troubleshoot, and optimize a complex highly available Service Provider IP NGN core infrastructure.
Dialed Number Identification Service. Dialed Number Identification Service (DNIS) is a service sold by telecommunications companies to corporate clients that lets them determine which telephone number was dialed by a customer. This is useful in determining how to answer an inbound call. The telephone company sends a DNIS number to the client phone system during the call setup. The DNIS number is typically 4 to 10 digits in length. Any DID (Direct inward dial) number will have a DNIS. This is the number sent from the central office to the PBX (Private branch exchange) or key system, telling the telephone system which number was dialed.
DNI (Documento Nacional de Identidad) This is the ID number for Spanish citizens. The same number is used for one's driver's license. This is the generic term for the tax ID number for all individuals. For Spaniards, it's the DNI plus one letter; for foreigners, it is your NIE. If you're a nonresident who has to pay taxes in Spain, you may get a NIF issued to you without having a NIE.