The record type that would be used to define where SIP (Session Initiation Protocol) is found is A (Address). A record is a type of DNS (Domain Name System) record that maps a domain name to an IPv4 address. SIP is a protocol that enables voice over IP (VoIP) communication, such as voice calls or video conferencing. SIP uses domain names to identify endpoints or servers involved in a communication session. Therefore, an A record is needed to resolve the domain name of a SIP endpoint or server to its IPv4 address. Reference: CompTIA Network+ N10-008 Certification Study Guide, page 154; The Official CompTIA Network+ Student Guide (Exam N10-008), page 6-8.