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In computer networking, what does the acronym 'DNS' stand for?
Data Network System
Domain Name System
Digital Node Service
Distributed Network Server
Domain Name System
DNS stands for Domain Name System. It is a hierarchical and decentralized naming system used to translate human-readable domain names, such as www.google.com, into numerical IP addresses required for computer communication.
RFC 1034, RFC 1035
DNS stands for Domain Name System. It is a hierarchical and decentralized naming system used to translate human-readable domain names, such as www.google.com, into numerical IP addresses required for computer communication.
Latency=тИСi=1nтАЛQuery┬аTimeiтАЛ+Processing┬аTime тАФ represents the time taken to resolve a DNS query across n hierarchy levels.
When a user enters a domain name, the client queries a recursive resolver. If the address is not in the cache, the resolver queries the Root server, then the TLD (Top-Level Domain) server, and finally the Authoritative Name Server, which provides the final IP address. This resolution process allows networks to use IP addresses (e.g., 192.168.1.1) while allowing humans to interact via descriptive names.
DNS operates primarily on port 53 using both UDP and TCP.
The system is organized into a tree structure known as the Domain Namespace.
It converts Fully Qualified Domain Names (FQDN) into either IPv4 (A records) or IPv6 (AAAA records) addresses.
Caching is a key mechanism used to reduce query latency.
Simplifies internet navigation by removing the need to memorize IP addresses.
Enables centralized management of network host mappings.
Provides flexibility to change server IP addresses without changing the domain name.
Vulnerable to DNS spoofing and cache poisoning attacks.
Potential for single point of failure if root servers are unreachable.
Web browsing (URL resolution)
Email delivery (MX records)
Network security (DNS sinkholing)
Option A, C, and D are incorrect as they do not represent the standard architectural term for internet naming services.
DNS uses a hierarchical database to distribute the administrative burden across multiple servers.
B is correct тАФ Domain Name System is the standardized protocol used for translating domain names into IP addresses in computer networking.
Remember that DNS primarily uses UDP for speed (port 53) but switches to TCP for zone transfers and messages exceeding 512 bytes, a common detail tested in competitive exams.