DNS Configuration Flashcards
What does the domain name server do?
a service that converts human readable names into computer readable IP addresses.
Is DNS a standalone server?
No, DNS is a multiple server group. It is a distributed database because there are many different DNS servers on the internet. There are 13 different root server clusters (or 1000 actual servers)
What are examples of top level domains?
There are hundreds of top level domains. some examples are .com, .org, .net etc
What is a CcTLD?
A country code top level domain. At this time there are 308 of them.
What are resource records?
the unit of information stored in a DNS server. They define data types for domain names. They are used to resolve all DNS queries and provide name resolution services.
What are some examples of record types?
IP addresses, certificates, host alias names
What is an Address record?
Also known as an A or AAA record. This is the purest form of DNS. The simplest type of DNS records and one of the primary records used. A records point domain names to IP addresses.
What is the difference between an A record and an AAA record?
An A record is for IPv4 and AAA is for IPv6.
What is a TTL
Time To Live also called a hop limit. I s a mechanism which limits the lifespan or limetime of data in a computer or network.
What is a TXT record
A DNS record that contains human readable information about a name server, network or data center and other accounting information such as point of contact details.
What is an MX record?
A mail exchange record which directs mail to the email server. The MX record indicates how email messages should be routed in accordance with the Simple Mail Transfer Protocol.
What is SPF?
Sender Policy Framework. An email authentication method which ensures the sending mail server is authorized to originate mail from listed approved entities. Prevents mail spoofing.
What is a DKIM?
Domain Keys Identified Mail. this record provides another layer of email security and provides a digital server we can associate with outgoing mail.
What is DMARC?
Domain-based Message Authentication Reporting and Conformance. an extension of DKIM and the SPF process. Prevents unauthorized email use and spoofing.
