The internet speed at Thapar University is usually around 1.5-2.0 MBps. The speed is decent enough to course work and stream videos. During early morning and late-night, the speed is good. A single device is allowed for a single account. There is also a certain limit on daily data usage per device.
One of my cousins studied at Thapar University and stayed in Hostel A. According to him, Internet access is available with WiFi. The LAN system which was present till a few years ago, is not there now. Since 2017, internet connection has been made through two ISPs - Reliance Communication and NKN. So here's an overview:
The speed depends on the time and days you wish to access the internet on. It's average but lets you manage your requirements in time. Good internet speed is available at Hostel J which according to students has a better connectivity score.