Which type of DNS record identifies an email server quizlet?

The AAAA records maps an IPv6 (128-bit) DNS host name to an IP address. The MX record identifies servers that can be used to deliver e-mail. The CNAME record provides alternate names (or aliases) to hosts that already have a host record.

What is the A record in DNS?

What is a DNS A record? The “A” stands for “address” and this is the most fundamental type of DNS record: it indicates the IP address of a given domain. For example, if you pull the DNS records of cloudflare.com, the A record currently returns an IP address of: 104.17. 210.9.

What type of DNS resource record is used to identify a server that is authoritative for a zone?

authority record
[3][1] start of [a zone of] authority record Specifies authoritative information about a DNS zone, including the primary name server, the email of the domain administrator, the domain serial number, and several timers relating to refreshing the zone.

What type of DNS server is authoritative for a specific domain?

The second type of DNS server holds a copy of the regional phone book that matches IP addresses with domain names. These are called authoritative DNS servers. Authoritative DNS nameservers are responsible for providing answers to recursive DNS nameservers about where specific websites can be found.

What are the types of DNS record?

DNS servers store records. When a DNS query is sent by a device, that query gets a response from those records with the help of DNS servers and resolvers. There are eight records that you see again and again: A, AAAA, CNAME, PTR, NS, MX, SOA, and TXT.

What is record and types of record?

Records include books, letters, documents, printouts, photographs, film, tape, microfiche, microfilm, photostats, sound recordings, maps, drawings, and a voice, data, or video representation held in computer memory.” Records are retained for administrative, financial, historical, or legal reasons.

What is DNS and types of DNS?

DNS is a core internet technology that translates human-friendly domain names into machine-usable IP addresses, such as www.example.com into 192.0.
…
The three DNS server types server are the following:
  • DNS stub resolver server.
  • DNS recursive resolver server.
  • DNS authoritative server.

What are the types of DNS queries?

There are three types of queries in the DNS system:
  • Recursive Query. …
  • Iterative Query. …
  • Non-Recursive Query. …
  • DNS Resolver. …
  • DNS Root Server. …
  • Authoritative DNS Server.

What is authority DNS server?

The authoritative DNS server is the final holder of the IP of the domain you are looking for. When you write a domain name in your browser, a DNS query is sent to your internet service provider (ISP). The ISP has a recursive server, which might have the needed information cached in its memory.

What are the 3 types of DNS servers?

There are three main kinds of DNS Servers — primary servers, secondary servers, and caching servers.
  • Primary Server. The primary server is the authoritative server for the zone. …
  • Secondary Servers. Secondary servers are backup DNS Servers. …
  • Caching Servers.

What are the two different types of DNS requests?

In general, there are two ways of resolving a host or a domain name to an IP address, using the domain name system – a Recursive query and a non-Recursive query. The Recursive query is, when a DNS client directly gets the IP address of a domain, by asking the name server system to perform the complete translation.

What is the difference between Cname and A Record?

Understanding the differences

These are the main differences: The A record maps a name to one or more IP addresses when the IP are known and stable. The CNAME record maps a name to another name. It should only be used when there are no other records on that name.

Which DNS query expects the requested resource record?

Which type of DNS query expects the requested resource record in the response or an error message? – Recursive query – A DNS client requests that a DNS server (usually a DNS recursive resolver) responds to it with either a resource record (if the resolver is unable to find it) or an error message.

Which type of DNS server performs a full name resolution request?

Answer: Recursive name servers are ones that perform full DNS resolution requests.

What is an apex record?

An apex record is a DNS record at the root (or apex) of a DNS zone. For example, in the DNS zone contoso.com , an apex record also has the fully qualified name contoso.com (this is sometimes called a naked domain).

What is PTR record in DNS?

A DNS pointer record (PTR for short) provides the domain name associated with an IP address. A DNS PTR record is exactly the opposite of the ‘A’ record, which provides the IP address associated with a domain name. DNS PTR records are used in reverse DNS lookups.

What is AWS alias record?

Alias records let you route traffic to selected AWS resources, such as CloudFront distributions and Amazon S3 buckets. They also let you route traffic from one record in a hosted zone to another record.

How DNS A record works?

A DNS record is a database record used to map a URL to an IP address. DNS records are stored in DNS servers and work to help users connect their websites to the outside world. When the URL is entered and searched in the browser, that URL is forwarded to the DNS servers and then directed to the specific Web server.

What is a DNS zone Azure?

A DNS zone is a data resource that contains the DNS records for a domain name. You can use Azure DNS to host a DNS zone and manage the DNS records for a domain in Azure. It also provides DNS name servers to answer DNS queries from the Internet.

What is DNS in AWS?

DNS, or the Domain Name System, translates human readable domain names (for example, www.amazon.com) to machine readable IP addresses (for example, 192.0. 2.44).