$(1)$ Which layer of the TCP$/$IP hierarchy actually transmits a message?A$.$ Application B$.$ Transport C$.$ Network D$.$ Link$(2)$ Which layer of the TCP$/$IP hierarchy chops messages into units whose size is compatible with the Internet?A$.$ Application B$.$ Transport C$.$ Network D$.$ Link$(3)$ Which layer of the TCP$/$IP hierarchy decides the direction in which message segments are transferred across the Internet?A$.$ Application B$.$ Transport C$.$ Network D$.$ Link$(4)$Which layer of the TCP$/$IP hierarchy presents incoming messages to the computer user?A$.$ Application B$.$ Transport C$.$ Network D$.$ Link$(5)$ Which layer of the TCP$/$IP hierarchy reassembles messages as their pieces arrive at the destination?A$.$ Application B$.$ Transport C$.$ Network D$.$ Link$(6)$ Which layer of the TCP$/$IP hierarchy is responsible for obtaining the correct address for a message's destination?A$.$ Application B$.$ Transport C$.$ Network D$.$ Link