Elastic Load balancing and Auto scaling groups

Question 1

Explain Application load balancer

ALB: Like a receptionist, routes traffic based on content.

Answer 1

Routes Layer 7 HTTP/HTTPS traffic based on the content, such as URL paths, host headers, or other request details.

It’s focused on handling detailed content and routing it to the right destination.

Question 2

Explain Network Load balancing

NLB: Like a traffic cop, directs traffic based on destination.

Answer 2

Handles Layer 4 TCP/UDP traffic, routing it based on the IP address and port number, without looking at the traffic content.

It’s designed for fast, low-level traffic routing based only on destination, without inspecting the data itself.

Question 3

Explain Gateway Load balancing

GWLB: Like a security gate, controls access based on permissions.

Answer 3

Manages traffic at the IP level Layer 3, dealing with incoming and outgoing network traffic, often used for routing to security or monitoring appliances.

Focused on network access management, making sure traffic has the correct permissions to enter or leave.