Devices are required to stick to a protocol so that the interrupt-request (IRQ) traces might be shared. The PCI bus includes 4 interrupt lines, INTA# by means of INTD#, all of which are offered to each system. As many as 8 PCI devices share precisely the same IRQ line (INTINA# https://nathanlabsadvisory.com/stay-safe-with-premium-penetration-testing-services-in-uae/