Indicates the level of network traffic graphed against a "theoretical" maximum bandwidth. The maximum bandwidth is calculated by totaling the capacity of all network devices reported by the operating system. If you are running on an Ethernet network, the actual maximum is approximately 50% of the theoretical bandwidth because of the methods involved in sending data. Having the actual bandwidth equal the theoretical bandwidth is only possible using full duplex Ethernet. Token passing network topologies, such as Token ring and FDDI, enable a theoretical maximum bandwidth much closer to the actual bandwidth.
The OS/Subsystem panel displays information about the amount of CPU being used by all processes. It also indicates the amount of System Memory and System Disk being used, and reports on any errors. This panel includes: