Every student with a non-EEA nationality needs to go through the visa process, including students who already have a European or Dutch residence permit, as this needs to be verified. You can check via the Dutch government if you have an EEA nationality. When your country is not on the list, you have a non-EEA nationality and need to go throw the process.
By Dutch law, students cannot apply for a visa themselves. All applications and extensions for (entry) visa’s, residence permits, and change of purpose visas are coordinated by the University of Twente. The Visa Office, which is not a part of UCT, but a centralized office at the University coordinates the visa application for the on-campus Bachelor students, including UCT students.
This process starts after responding to the Offer of Admission. The Offer of Admission will be provided after conditional admission. In the conditional admission letter will be more information and instructions on how to respond to the Offer of Admission. Accordingly, you will receive more information about the visa process.