Which port number is commonly assigned to AFP for file sharing on macOS?

Which port number is commonly assigned to AFP for file sharing on macOS?

• A. 179
• B. 548
• C. 13
• D. 67

Answer: (B)

AFP is Apple's File Sharing protocol, and like any network service, it listens on a specific port so clients can find it. The default port for AFP over TCP is 548, which is the well-known, registered port assigned to Apple Filing Protocol. That means when AFP is in use, connections typically target port 548 on the server. Modern macOS versions often use SMB for file sharing, but AFP’s standard port remains 548 when AFP is selected. The other ports listed are assigned to different services, so they wouldn’t be used for AFP.

AFP is Apple's File Sharing protocol, and like any network service, it listens on a specific port so clients can find it. The default port for AFP over TCP is 548, which is the well-known, registered port assigned to Apple Filing Protocol. That means when AFP is in use, connections typically target port 548 on the server. Modern macOS versions often use SMB for file sharing, but AFP’s standard port remains 548 when AFP is selected. The other ports listed are assigned to different services, so they wouldn’t be used for AFP.