There are various checks that can be imposed before a student is allowed to attempt a quiz. For example the open and close dates, the time-limit, requiring the student to enter a password before starting, and so on.
Moodle proctoring is a quizaccess plugin to capture the user's picture via webcam to identify who is attempting the Moodle Quiz. It will capture the picture automatically every 30 seconds and store it as a PNG image.
This plugin works just as usual limitation on IP, but the list of subnets with names (eg, library, local area network, a computer lab, etc.) enters the site administrator. Teachers in tests simply select the required subnet.
Control the initial access to a Quiz with a randomized delay to reduce the load at the start and end times. By lightly spreading the access of the students the server load decreases dramatically and the overall capacity of your system increases by orders of magnitude.
The Wifiresilience accessrule is designed to allow students to continue work on deferred-feedback quiz attempts even if the network connection goes down. For this purpose Wifiresilience makes use of localstorage. Stored answers can be accessed, synced to server and also be downloaded manually in case connection does not come back.