Install Node.js on Mac

Install Homebrew:

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ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

Install Node.js:

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brew update

brew uninstall node

brew install node

chown -R ravi /usr/local/lib/node_modules/

brew postinstall node

Install serverless:

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npm install -g serverless

kill port on Windows

to find port : netstat -ano | findstr :8080
to kill port  : taskkill /PID <PROCESSID> /F

AWS ELB differences - ALB vs NLB vs CLB

Difference between : Application Load Balancer vs Network Load Balancer vs Classic Load Balancer

	Application ELB	Network ELB	Classic ELB
Protocols	load balance HTTP/HTTPS applications	Ideal for load balancing of TCP traffic	TCP, SSL, HTTP, HTTPS
	Validates the request		Doesn't validate request.
	Sticky sessions generated by ELB	No	Sticky sessions generated by application (Yes) – (req/res happens to only 1 serve always)
	Route to multiple ports on a single instance (Create Listener rules) - Path-Based Routing/Host-Based Routing	No	No
	HTTP/2	No	No
	ELB deletion protection	Yes	No
	Web socket support		No
	Supports access logs (logs stored in S3)	Yes	Yes
	Requires you to specify more than one Availability Zone, but supports Load Balancing to multiple ports on the same instance	It accepts incoming traffic from clients and distributes this traffic across the targets within the same Availability Zone
	No	Static/Elastic IP support	No