Complex sentence: In computer networking and telecommunication, a frame is a digital data transmission unit that includes frame synchronization, i.e. a sequence of bits or symbols making it possible for the receiver to detect the beginning and end of the packet in the stream of symbols or bits.
Split into simpler sentences: In computer networking and telecommunication, a frame is a digital data transmission unit. A frame typically includes frame synchronization features consisting of a sequence of bits or symbols that indicated to the receiver the beginning and end of the payload data in the stream of symbols or bits.