--> In the data center, traffic going from one network segment or application of the data center to another network segment or application within the data center is often referred to as east-to-west (or west-to-east) traffic. This is also known as lateral traffic.
--> In simple terms, the traffic from one server to other server in data center.
--> Similarly, traffic going to and from the data center and the rest of the corporate network is often referred to as north-to-south (or south-to-north) traffic.
--> In simple terms, the traffic which is going from Access layer to Core layer in data center.