Diagram Components, Connections, and Communication Labels
The diagram shows the main PC server, 10 desktop computers, a printer, an internet router, a switch, and a smartphone. All PCs connect to the server through the switch using wired connections. The smartphone connects to the server using Bluetooth. PC 8 has a direct connection to the printer, while the other PCs print through the server.

Topology and Architectures
The café uses a star topology, where the switch is at the center and all computers connect to it. It uses client-server architecture because the main PC server handles printing and file receiving. It also uses peer-to-peer architecture for PC 8 because it communicates directly with the printer.

How Data Flows in the Network
The smartphone sends files to the main server via Bluetooth. The other PCs send their print jobs to the server, which forwards them to the printer. PC 8 sends its file directly to the printer without using the server.

Network Protocols Used and When They Are Used
Bluetooth protocol – used when the smartphone sends files to the server.
TCP/IP – used by the desktop computers for communication through the switch and server.
IPP (Internet Printing Protocol) or USB/Direct Print protocol – used by PC 8 to send documents directly to the printer.
Wi-Fi protocol – used by the router to provide internet access.