The Network layer (Layer 3) provides logical addressing through IP addresses and maintains the source and destination addresses end-to-end across the entire path between communicating devices. Routers use these logical addresses to forward packets between networks.

Aruba's Captive Portal uses Layer 3 authentication, which means that it intercepts the client's HTTP requests and redirects them to a web page where the client can enter their credentials. The credentials are then verified by a RADIUS server or a local database before granting network access.

Each SSID generates beacon frames that consume airtime. Reducing the number of SSIDs decreases the number of beacons transmitted, reducing management overhead on the wireless medium.
With less airtime consumed by beacon traffic, more airtime is available for client data transmission, which increases overall WLAN throughput.

A loopback interface remains up regardless of physical interface states, providing a stable and consistent router ID for OSPF, which helps avoid unnecessary routing changes and updates.