Pci Express Specification !link! -

The PCIe specification is defined by a layered protocol stack that ensures reliable data transmission and backward compatibility across generations.

PCIe supports hot plugging (connecting or disconnecting hardware while the system is running), a critical feature for enterprise servers and external enclosures (e.g., Thunderbolt docks using PCIe tunnels). pci express specification

The uppermost layer handles the assembly and disassembly of Transaction Layer Packets (TLPs). The PCIe specification is defined by a layered