what are the 3 types of load balancers in aws?

• v1:
  • Classic Load Balancer (CLB): 2009
• v2:
  • Application Load Balancer (ALB): HTTP/s, gRPC 👈 Layer 4
  • Network Load Balancer (NLB): TCP/UDP, TLS 👈 Layer 7
  • Gateway LB (GWLB)

(AWS ELB Comparisons)

what is the benefits of load balancer?

• Distributing workloads across multiple compute resources 👉 HA & FT
• Decoupling application tiers 👉 ↕️ compute resources without disrupting the overall flow of our app.
• Or:
  • Sending request only to healthy ones.
  • Offloading encryption/decryption from computer resources to LB.

(Source)

what are 2 types [scheme](https://docs.aws.amazon.com/elasticloadbalancing/latest/userguide/how-elastic-load-balancing-works.html#load-balancer-scheme) of aws elb?

• Internet-facing LB: the nodes have public IP addresses.
• Internal LB: the nodes have only private IP addresses.

why aws classic load balancer don't scale?

CLB don’t support TLS Server Name Indicator (SNI).

😭 Every unique host name requires an individual CLB.

what is lb consolidation?

When multiple websites are hosted on one server (the LB) and share a single IP address.

how does aws v2 lbs allows consolidation?

AWS v2 ALB support rules and target groups.

Using an ALB and its rules based on TLS SNI allows consolidation.

which type of elb can have a static ip?

Only NLB can have a static IP.

what are 3 types of asg healthcheck?

• EC2 (Default)

  • Hardware issue of EC2 host
  • Software issue of EC2 instance

• ELB

  More application aware (Layer 7).

• Custom

  Instances mark healthy/unhealthy by an external system.s

what are 3 ways that elb's can handle ssl?

• Bridging (Default): HTTPS <-> HTTPS
• Pass-through: TCP
• Offload: HTTPS <-> HTTP