Network+ Module 22 - DNS, Records, & Protocols

A collection of flashcards covering key concepts and vocabulary related to DNS, its records, and associated protocols.

Domain Name System (DNS)

A system that resolves domain names to IP addresses.

Root Server

With regards to DNS, this is the server that accepts a domain name and forwards it to the best domain server.

Authoritative Name Server

With regards to DNS, this is the Server responsible for knowing everything about a domain.

Type A Record

DNS record type that resolves domain names to IPv4 addresses.

Time To Live (TTL)

A value that indicates how long a DNS record is valid until the next update.

Type AAAA Record

DNS record type that resolves domain names to IPv6 addresses.

Canonical Name (CNAME) Record

DNS record type that resolves a domain or subdomain to another domain name.

Mail Exchange (MX) Record

DNS record type used to specify the email server responsible for receiving email for a domain.

Name Server (NS) Record

DNS record type that provides the name of the authoritative name server within a domain.

Pointer Record (PTR)

DNS record type that resolves IP addresses to domain names, used for email verification.

Text Record (TXT)

DNS record type used to store miscellaneous information about a domain, often for spam prevention.

DNSSEC (Domain Name System Security Extensions)

A set of cryptographic protocols that add digital signatures to DNS records to secure them.

DNS over HTTPS (DoH)

A protocol that encrypts DNS queries using HTTPS for privacy.

DNS over TLS (DoT)

A protocol that improves privacy by encrypting DNS queries and preventing eavesdropping.

Forward Zone

A DNS Zone that resolves domain names to IP addresses.

Reverse Zone

A DNS Zone that resolves IP addresses to domain names.

Network Time Protocol (NTP)

Internet standard used to synchronize clocks of computers with a master clock.

Network Time Security

Enhancement of NTP to ensure secure communication for time synchronization.

Domain Server

With regards to DNS, this is the server that stores DNS records and responds to queries.