Improve the description of test environment

Improve the writing, making it more informative.

Author: jychen0611

README.md

@@ -36,14 +36,13 @@ $ pip3 install numpy matplotlib
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 ## Testing environment (non-virtio)
-To test the network environment, we can utilize the **Linux network namespace**.
-Linux network namespace allows us to isolate a network environment from the host system, providing its own routes, firewall rules, and network devices.
-Essentially, it creates a separate instance of the network stack.
+To test the network environment effectively, we utilize **Linux network namespaces**. These namespaces isolate network environments from the host system, providing distinct instances of network stacks with independent routes, firewall rules, and network devices.
 
-Without network namespace, when virtual interfaces are created that share the same network namespace and start transmitting/receiving packets between them,
-the kernel will use the loopback device for packet transmission/reception. This behavior occurs because the kernel identifies that the sender and receiver are on the same host.
+Without network namespaces, virtual interfaces created within the same namespace use the loopback device for packet transmission between them, as the kernel recognizes them as residing on the same host.
 
-In conclusion, all the interfaces created by `vwifi` in the testing environment will be added to an isolated network namespace.
+In our testing setup, all interfaces created by vwifi are placed within an isolated network namespace. This approach ensures that each virtual interface operates independently, facilitating comprehensive testing of networking functionalities without interference from the host's network configuration.
+
+Below, we will conduct two separate tests: Infrastructure BSS and Independent BSS.
 ### Infrastructure BSS
 <p align="center"><img src="assets/vwifi.png" alt="logo image" width=60%></p>