Route 53 basics Flashcards
Global Domain Name System (DNS) web service that routes traffic to various targets with a single database
Route 53
Can you register domains with Route 53
Yes
container for DNS records, and these records contain information about how you want to route traffic for a specific domain
Zones
Can Route 53 tolerate the failure of one or more regions and continue to operate
Yes
automatically creates a name server (NS) record and a start of authority
(SOA) record
Public hosted zone
When you create a VPC, Route 53 Resolver automatically answers DNS queries for local VPC domain names of EC2 instances and records in private hosted zones
private hosted zones
Stores records
Hosted zones
indicates which DNS server is authoritative for that domain (i.e. which server contains the actual DNS records)
Nameserver Records
Record that tells the Internet where to go to find out a domain’s IP address
Nameserver Records
Record that maps host onto a IPv4 address
A record
Record that maps host onto a IPv6 address
AAAA record
Record that maps host to host
CNAME
Can CNAME records map directly to an IP address
No
Indicates how email messages should be routed in accordance with the Simple Mail Transfer Protocol (SMTP, the standard protocol for all email)
MX records
‘priority’ numbers before the domains for these records indicate preference; the lower ‘priority’ value is preferred.
MX records
Lets a domain administrator enter text into the Domain Name System (DNS) and prove ownership
TXT Records
server setting that tells a cache how long to store DNS records before refreshing the search to get an answer again from a nameserver
TTL
More queries against nameservers
Low TTL
Less queries, less control to change records
High TTL
manages the DNS Root Servers
12 Organizations
How many DNS root nameservers exist
13
Who Manages the DNS Root Zone
IANA
Maintains information for all the domain names that share a common domain extension, such as .com, .net, or whatever comes after the last dot in a URL
TLD nameserver
Management of TLD nameservers, has oversight for registries and registrars
Internet Assigned Numbers Authority (IANA)
Organization that manages the administrative data for the domains and subdomains with the specific domain endings under its authority (zone files)
Registry
Organization that manages the registration of domain names for one or more registries.
Registrar
