Final answer:
In CNT4703C lab, students learn to configure multiple VLANs and router sub-interfaces in a Cisco environment, enhancing inter-VLAN routing and network segmentation skills.
Step-by-step explanation:
Understanding Multiple VLANs and Router Sub-Interfaces
When configuring VLANs (Virtual Local Area Networks) in a Cisco environment, it builds upon foundational networking skills. In a lab designed for CNT4703C, the focus is on extending the previous knowledge by introducing router sub-interfaces. These sub-interfaces allow a single physical router interface to manage traffic between multiple VLANs, effectively enabling the router to perform inter-VLAN routing. To configure VLANs and sub-interfaces, one must access the router's CLI (Command Line Interface), create the VLANs, assign them to specific ports on the switch, and then configure the router's sub-interfaces with the appropriate encapsulation and IP addresses that correspond to each VLAN.
In a typical configuration, router sub-interfaces are associated with VLANs by using dot1Q encapsulation, where each sub-interface corresponds to a specific VLAN tag. This allows network traffic to be properly routed between VLANs based on the tag. Having multiple VLANs increases network segmentation and security, as it separates broadcast domains and allows for better traffic management.