Final answer:
According to standard textbooks, the Internet protocol suite, or TCP/IP, consists of four layers: link, internet, transport, and application.
Step-by-step explanation:
The Internet protocol suite, commonly referred to as TCP/IP, comprises four layers according to standard textbook definitions. These layers are: the link layer, the internet layer, the transport layer, and the application layer. This layered approach allows the development and integration of a variety of networking technologies. The link layer handles communication between adjacent network nodes, the internet layer provides internetworking and essentially routes packets across networks, the transport layer handles host-to-host communication, and the application layer provides protocols for software applications to communicate over the network.