Teacher: Glezevich Ivan Ivanovich
Welcome to hell
Glezevich recommends to use his versions of PacketTracer and GNS, but it's not forbidden to use latest\nightly versions, so
Is not available (2023) in Belarus, so it is hard to use native version on Linux, BUT it is possible, however i used nordvpn which one was detected by cisco, so i used wine version of it.
Works perfectly, but installation might be tricky, strongly recommend to use qemu for virtual machines in GNS.
Also GNS makes your laptop fly, so it's better to use powerful laptops