Route 53 Flashcards
What ia route 53?
Amazon Route 53 is a scalable and highly available cloud Domain Name System (DNS) web service offered by Amazon Web Services (AWS). It provides domain registration, DNS routing, and health checking services, allowing you to manage the domain names and direct internet traffic to various resources
What are the main features of route 53?
Route 53 offers several key features, including:
Domain Registration: Route 53 allows you to register new domain names or transfer existing ones to manage them within the service.
DNS Routing: It enables you to route incoming DNS requests to the appropriate resources, such as Amazon EC2 instances, AWS load balancers, or S3 buckets.
Traffic Management: Route 53 provides traffic management capabilities, such as weighted routing, latency-based routing, and geolocation routing, to distribute traffic across multiple endpoints based on various criteria.
Health Checks: Route 53 allows you to configure health checks to monitor the availability and performance of your resources. It can automatically route traffic away from unhealthy resources.
DNS Failover: In the event of a failure, Route 53 can automatically redirect traffic from an unhealthy resource to a healthy one.
DNSSEC: Route 53 supports DNS Security Extensions (DNSSEC), which helps protect the integrity and authenticity of DNS responses.
Integration with AWS Services: Route 53 seamlessly integrates with other AWS services, such as Amazon S3, CloudFront, and Elastic Load Balancing, providing efficient and reliable DNS resolution for these services.
These are some of the main features of Amazon Route 53. Let’s move on to the next question.
What types of DNS records does Route 53 support?
A Record: A record maps a domain or subdomain to an IPv4 address. It is used to resolve a domain name to an IPv4 address.
AAAA Record: AAAA record maps a domain or subdomain to an IPv6 address. It is used to resolve a domain name to an IPv6 address.
CNAME Record: CNAME record creates an alias for a domain or subdomain. It is used to point one domain or subdomain to another domain name.
MX Record: MX record specifies the mail servers responsible for accepting email messages on behalf of a domain. It is used in email routing.
TXT Record: TXT record stores arbitrary text data for a domain. It is commonly used for various purposes such as SPF (Sender Policy Framework) records for email validation.
NS Record: NS record specifies the authoritative name servers for a domain. It is used to delegate DNS resolution to a specific DNS provider.
SOA Record: SOA (Start of Authority) record provides essential information about a DNS zone, including the primary name server, email contact, and serial number.
SRV Record: SRV record specifies the location of a service in the domain. It is used for service discovery and is commonly used in applications like SIP and XMPP.
How does Route 53 handle traffic routing and load balancing?
Simple Routing: Route 53’s simple routing allows you to route traffic to a single resource, such as an IP address or an Elastic Load Balancer, based on DNS records like A or AAAA records.
Weighted Routing: Weighted routing enables you to distribute traffic across multiple resources in proportions specified by weight values. For example, you can route 80% of traffic to one resource and 20% to another.
Latency-Based Routing: With latency-based routing, Route 53 routes traffic to the resource with the lowest latency for the user. It determines the user’s latency by measuring the time taken for DNS resolution from different locations.
Geolocation Routing: Geolocation routing allows you to route traffic based on the geographic location of the user. You can specify different resources to be returned based on the user’s location.
Failover Routing: Failover routing enables you to configure primary and secondary resources, where traffic is routed to the secondary resource only if the primary resource becomes unavailable.
Multivalue Answer Routing: Multivalue answer routing allows you to configure multiple records with the same name and record type, each with different IP addresses. Route 53 responds to DNS queries with up to eight healthy records, providing basic load balancing across the specified resources.
Health-Based Routing: Route 53 allows you to perform health checks on your resources and route traffic only to healthy resources, automatically routing traffic away from unhealthy ones.
