Route 53 Flashcards
Route53 how did this name comes from
I66 was the first interstate. DNS is on port 53
top level domain
The last word in the domain name separate by dot
second level domain name
second word in the domain name
IANA
top level domain name are controlled by IANA, which is a database of all top level domains
A registrar
A registrar is an authority who can assign names directly under one or more top level domains.
InterNIC a service of ICANN
These domains are registered with interNIC a service of ICANN, ICANN enforces uniqueness of domain name across internet.
whois db
Each domain name gets registered in a central DB known as whois db
SOA record(Start of Authority)
Name of server who supplied the data for the zone,
administrator for the zone
current version of the data file
TTL
Name Server record
Used by top level DNS server to direct traffic to content level DNS server. Name sever gives us SOA. Inside SOA will have all the DNS records
A -record(Address)
converts domain name to ip address
DNS name can take
48 hours
CName standars for Canonical name
Resolve one domain name to another name
Alias records
map resource records in your hosted zone to ELB, Cloud front, S3 buckets
Difference Alias and CName
Cname cant be used to for naked domain names(zone apex record)
ELB
ELBs do not have a predefined IPV4 address. You resolve to them using a DNS name
Common DNS types
SOA records NS records A records CNAMES MX erecords PTR records
ELBs do not have predefined IPV4 addresses
You resolve to them using a DNS name
Routing policies
Simple Routing Weighted Routing Latency based routing Failover routing Geolocation routing Geoproximity Routing(Traffic flow only) Multivalue answer routing
You are hosting a website and would like visitors from United Kingdom to see a different site than those in Australia. Which Routing Policy would help you to accomplish this
Geolocation
True or False: There is a limit to the number of domain names that you can manage using Route 53
True and False. With Route 53, there is a default limit of 50 domain names. However, this limit can be increased by contacting AWS support.
Multivalue
Multivalue answer routing lets you configure Amazon Route 53 to return multiple values, such as IP addresses for your web servers, in response to DNS queries. Route 53 responds to DNS queries with up to eight healthy records and gives different answers to different DNS resolvers. The choice of which to use is left to the requesting service effectively creating a form or randomisation.