Answer:
Excel file formats
Format Extension
Excel Workbook .xlsx
Excel Macro-Enabled Workbook (code) .xlsm
Excel Binary Workbook .xlsb
Template .xltx
I think the answer is The PPP (Point-to-Point Protocol). <em />
It is the most common type of protocol that people use using a modem, a device or a router to have an internet connection. Here there two systems that establish a link to each other which is the point to point. The bits are transferred to a sender and a receiver.
Single tasking? If the OS's kernel doesn't allow multi-tasking, how does it service interrupts and handle I/O?
