CUIT operates an extensive indoor and outdoor wifi network.
The map is no longer there.
802.11n is available in Schapiro and Hamilton in select auditoriums/classrooms.
Wired connectivity is still more reliable in many locations.
Gigabit ethernet is available in portion of Butler and Schermerhorn libraries. Otherwise speeds are limited to 100 MBps down and up. Gigabit outlets routinely provide 350 MBps down and 150 MBps up.
CUIT is rolling out a network called "Columbia U Secure" that takes a UNI and password, encrypting the connection using WPA2 Enterprise security.