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The Domain Name System (DNS) is a hierarchical and distributed name service that provides a naming system for computers, services, and other resources on the Internet or other IP networks. It uses the DNS protocol, which specifies the data structures and data communication exchanges used in the DNS, and runs over UDP or TCP.
Packet Tracer is a cross-platform visual simulation tool that allows users to create and configure network topologies and devices. It is mainly used for educational purposes by Cisco Networking Academy students and supports various protocols and features.
Java is a popular, general-purpose, object-oriented language that can run on any platform with a Java virtual machine. Learn about its history, features, applications, and influences from this comprehensive Wikipedia article.
A fully qualified domain name (FQDN) is a domain name that specifies its exact location in the tree hierarchy of the Domain Name System (DNS). It specifies all domain levels, including the top-level domain and the root zone, and is written as a list of domain labels separated by dots.
Learn about the history, development, and applications of Java, a cross-platform software platform for developing and running programs in Java language. Find out the latest and supported Java versions, their features, and how to download and install them.
1.1.1.1 is a recursive DNS service by Cloudflare that provides domain name resolution for any host on the Internet. It also offers encryption, VPN, and filtering features via its mobile app and website.
Learn how to query the Domain Name System (DNS) to determine the domain name associated with an IP address, using the special domain in-addr.arpa for IPv4 and ip6.arpa for IPv6. Find out the historical, implementation and usage details of reverse DNS lookup.
A DNS zone is a specific portion of the DNS namespace that a specific organization or administrator manages. Learn how DNS zones are implemented in zone files, how they are used for forward and reverse resolution, and how they are delegated in the Internet infrastructure.