Q. What do we call a CPU that is designed specifically to handle the communications processing task with main purpose is to off-load communications processing task from the host computer so that the host computer can be dedicated for applications and data processing jobs? 
Answer: Front-end processor
Notes: A front end processor (FEP), or a communications processor, is a small-sized computer. It interfaces to the host computer a number of networks. They are SNA, or a number of peripheral devices, such as terminals, disk units, printers and tape units. a CPU that is designed specifically to handle the communications processing task with main purpose is to off-load communications and processing task.