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2. nslookup - Wikipedia

   en.wikipedia.org/wiki/Nslookup

   nslookup operates in interactive or non-interactive mode. When used interactively by invoking it without arguments or when the first argument is - (minus sign) and the second argument is a hostname or Internet address of a name server, the user issues parameter configurations or requests when presented with the nslookup prompt (>).

3. IP address - Wikipedia

   en.wikipedia.org/wiki/IP_address

   IP addresses are assigned to a host either dynamically as they join the network, or persistently by configuration of the host hardware or software. Persistent configuration is also known as using a static IP address. In contrast, when a computer's IP address is assigned each time it restarts, this is known as using a dynamic IP address.

4. CNAME record - Wikipedia

   en.wikipedia.org/wiki/CNAME_record

   Also, while a DNS client requires at least two queries to resolve a CNAME to an A record to an IP address, an ANAME will shift the second and subsequent query to the server. If the DNS server can resolve the A record and cache the requested IP address more efficiently and with less latency than its DNS clients can, then the DNS client can ...

5. DNS hijacking - Wikipedia

   en.wikipedia.org/wiki/DNS_hijacking

   DNS hijacking, DNS poisoning, or DNS redirection is the practice of subverting the resolution of Domain Name System (DNS) queries. [1] This can be achieved by malware that overrides a computer's TCP/IP configuration to point at a rogue DNS server under the control of an attacker, or through modifying the behaviour of a trusted DNS server so that it does not comply with internet standards.

6. Domain Name System blocklist - Wikipedia

   en.wikipedia.org/wiki/Domain_Name_System_blocklist

   A Domain Name System blocklist, Domain Name System-based blackhole list, Domain Name System blacklist (DNSBL) or real-time blackhole list (RBL) is a service for operation of mail servers to perform a check via a Domain Name System (DNS) query whether a sending host's IP address is blacklisted for email spam. [1]

7. Dynamic DNS - Wikipedia

   en.wikipedia.org/wiki/Dynamic_DNS

   Dynamic DNS (DDNS) is a method of automatically updating a name server in the Domain Name System (DNS), often in real time, with the active DDNS configuration of its configured hostnames, addresses or other information.