QoS best practices include:

1. Implementing a hierarchical QoS architecture that allows for granular control and efficient utilization of network resources.

2. Establishing clear policies regarding bandwidth and prioritization of applications, users, and traffic types.

3. Applying QoS Markings (DSCP, CoS, 802. 1p) to the appropriate traffic and ensuring these markings are not overridden by the network infrastructure.

4. Monitoring the network for traffic performance and compliance with the established policies.

5. Analyzing traffic patterns on an ongoing basis in order to identify high–usage applications and users in order to adjust the QoS parameters accordingly.

6. Utilizing advanced QoS features such as Traffic Shaping, Rate Limiting, and Packet Prioritization to better manage network congestion and prioritize mission–critical applications.

WPA2 Enterprise is a type of Wi–Fi security protocol used to secure wireless networks. It is based on the 802.11i standard, which provides enhanced encryption and authentication over regular WPA2 Personal security. It is designed for business networks where more secure authentication protocols are needed. It uses 802.1X authentication with either EAP–TLS, TTLS, PEAP, or other methods to authenticate users and establish a secure connection. It also provides important security features such as dynamic key management, per–user encryption keys, and message integrity checks.

Switch codes are codes used to control access and functionality on networking devices, such as routers and switches. These codes are typically entered on the device’s console or command line interface (CLI)and are used to control various settings, including network interfaces, routing tables, and switch port configurations.