Spoofing It is the act of disguising a communication from an unknown source as being from a known, trusted source. Spoofing can apply to emails, phone calls, and websites, or can be more technical, such as a computer spoofing an IP address, Address Resolution Protocol (ARP), or Domain Name System (DNS) server.Explanation:Therefore when a DNS server accepts and uses incorrect information from a host that has no authority giving that information, then it is called DNS spoofing.Option 3 is correct Additional InformationDNS lookupIn computer networks, DNS lookup is the querying technique of the Domain Name System (DNS) to determine an IP address, associated with a domain name.DNS hijackingIt is also named DNS redirection, is a type of DNS attack in which DNS queries are incorrectly resolved in order to unexpectedly redirect users to malicious sites.