What does ELB mean in AWS?

ELB stands for Elastic Load Balancing, it load balancing service for incoming traffics to routes for multiple targets in multiple AZ's

Which type of Load Balancer is best to use?

The Best ELB would be ALB where we could use for mutipurse like path, host, query, header routings, for applications,

What is path-based and host based routing?

In ALB the path based routing is one the feature, it routes HTTP/HTTPS based on the URL request path.

I.e
http:// www.example.com/test
/test is here path

Host based:
it allows HTTP/HTTPS routing to different target groups based on the hostname in the URL,
i.e
http://node1.example.com
http:''node2.example.com

Define Path routing pattern?

In ALB the path based routing is one the feature, it routes HTTP/HTTPS based on the URL request path.

I.e
http:// www.example.com/test
/test is here path

What is the major Advantages of ALB?

ALB works in layer 7 in OSI model, in the HTTP/HTTPS protocols, it routes in the content of the request, such as URL path, hostname, headers, or query string.