Domain Name System (DNS) is like the internet\u2019s phonebook. It translates human-friendly domain names (e.g., www.upsc.gov.in) into IP addresses (e.g., 164.100.94.59) that computers use to identify each other on a network.<\/p>\n
Without DNS, we would have to memorise long numeric IPs for every website.<\/p>\n
How DNS works<\/p>\n
User enters URL in browserDNS Resolver checks if IP is cached locally; if not, queries startRoot DNS Server directs to Top-Level Domain (TLD) Server (e.g., .in, .com)TLD Server points to Authoritative Name Server for that domainAuthoritative Server returns IP addressBrowser connects to that IP \u2192 loads the website<\/p>\n
Think of it as a hierarchical, distributed database maintained globally<\/p>\n
Types of DNS records (important for tech + security questions)<\/p>\n
A record \u2192 IPv4 address mappingAAAA record \u2192 IPv6 address mappingCNAME \u2192 Alias mappingMX \u2192 Mail server addressTXT \u2192 Verification & security info (SPF, DKIM)<\/p>\n
Analytical importance (Civil Services perspective)<\/p>\n
AspectAnalytical significanceGovernance & policyManaged globally by ICANN; critical for internet governance debates.Digital infrastructureBackbone of online services; impacts e-governance, digital economy.CybersecurityTarget for attacks like DNS spoofing, cache poisoning, pharming.Data sovereigntyCountries demand local DNS root servers to avoid foreign control.Service continuityDNS failures can paralyse entire sections of the internet.<\/p>\n
Critical viewpoint<\/p>\n
Centralisation risk \u2013 Although distributed, DNS root servers are few (Rs 13 logical root server clusters); potential geopolitical chokepoints.Vulnerability to attacks \u2013 DNS spoofing can redirect traffic to malicious sites, threatening cybersecurity & citizen trust.Dependency on US-based ICANN \u2013 Raises data sovereignty concerns for countries like India.Censorship potential \u2013 Governments can block sites at DNS level, which may conflict with freedom of expression.Lack of encryption \u2013 Traditional DNS queries are unencrypted; newer standards like DNS over HTTPS (DoH) and DNS over TLS (DoT) aim to fix this.<\/p>\n
Relevance in India<\/p>\n
Digital India & BharatNet expansion \u2192 needs robust DNS infrastructureNational Internet Exchange of India (NIXI) \u2192 manages .in domainCERT-In & MeitY initiatives \u2192 secure DNS practices for government websitesPush for local DNS root servers to improve speed, security & sovereignty<\/p>\n","protected":false},"excerpt":{"rendered":"Domain Name System (DNS) is like the internet\u2019s phonebook. It translates human-friendly domain names (e.g., www.upsc.gov.in) into IP…\n","protected":false},"author":2,"featured_media":75393,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[64,63,237,105],"class_list":{"0":"post-75392","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-internet","8":"tag-au","9":"tag-australia","10":"tag-internet","11":"tag-technology"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts\/75392","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/comments?post=75392"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts\/75392\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/media\/75393"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/media?parent=75392"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/categories?post=75392"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/tags?post=75392"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}