The number of ports on this bridge participating in this VLAN in this domain, if the domain is enabled. This will be zero if the STP domain is disabled on the bridge. The panel at the bottom of this view shows summary information about the STP domain and VLAN with which these devices are associated. Displaying STP Port Information Select a device in the Component Tree to view information about the ports on the device that are members of the selected VLAN and STP domain. When you select a device, the STP Ports view appears, as shown in See STP Ports view. STP Ports view This view shows information about ports on the selected device that are participating in an enabled STP domain. The information presented for each port includes
The numbered channel through which data travels to and from a networked device. Typically the specific port number is associated with the type of data being transferred. e.g. Web pages: 80, FTP:21, Email 25 and 110, etc.