Understand the hardware architecture of a typical IBM style PC along with knowledge of current and past BIOS configurations and Operating System functions
In most cases, external equipment is connected to a PC through a pre defined input output route such as USB. Some devises still use older serial interfaces such as RS232. Parallel interfaces are often made to other equipment through interfaces such as PCI. The BIOS provides the most basic description of the PC operations and the Operating System then supports as system of drivers to handle individual items that are connected to the PC. Drivers then interface with the software that supports the external device
The knowledge named 'PC architecture and Operating System details' is considered to be quite important.
In addition, the knowledge is thought to be mostly very difficult to replace, it is learned mainly by study but needs experience, and there are 2 people available to deliver this knowledge.
Opinion is that it it requires 2 people to deliver this knowledge, it is modelratley specialised knowledge, and is frequently changing knowledge.
The learn time for this node given an understanding of the prerequisites, is about 2 weeks. The estimated learn time for the entire knowledge structure of this node is about 1 year.