What does DNS Stand for?

Domain Name System

DNS is how domain names are translated into IP addresses, and DNS also controls email delivery. DNS is what allows you to use your web browser to find web sites as well as send and receive email.

When a client makes a request to a DNS server, what is this called?

DNS Query

What is an iterative query?

What is a recursive query?

Can changes on the actual site server affect a DNS record?

Short answer, No.

What are common causes of DNS breakage?

Server IP changes w/o corresponding DNS update.

Domain Name Servers improperly set up

During infrastructure updates such as new server and registrar transfer

What tools can you use to troubleshoot DNS errors?

NSLookup

whois

If a record is broken somehow, are there SEO impacts, or does Google store the actual IP address and use that to crawl sites?​​

Short answer, Yes and No.

What kind of record types do we work with?

A Record - Apex record

mmgyglobal.com - 209.235.246.10

CName Record - Canonical Name Record 

MX Record - Mail Exchanger record

Of those, which ones are most problematic/challenging to work with and why?

A Record - Because most clients manage their own DNS.

What determines what kind of query takes place and why?

It totally depends on what resource is requesting the DNS query.

What’s the impact of one query type vs the other?

A Record - Pulls up IP directly. Harder to manage.

CName Record - References previously defined records. Can have a long chain lookup.

Who are our DNS SMEs in house?

What's an SME?