Summary

Chapter 1: Introduction to the Personal Computer 31SCSI Ports and CablesA SCSI port can transmit data at rates in excess of 320 Mbps and can support up to 15devices. If a single SCSI device is connected to a SCSI port, the cable can be up to 80 feet(24.4 m) in length. If multiple SCSI devices are connected to a SCSI port, the cable can beup to 40 (12.2 m) feet in length. A SCSI port on a computer can be one of three differenttypes, as shown in Figure 1-15:■■■DB-25 female connectorHigh-density 50-pin female connectorHigh-density 68-pin female connectorFigure 1-15SCSI ConnectorsNoteSCSI devices must be terminated at the endpoints of the SCSI chain. Check the device manual fortermination procedures.CautionSome SCSI connectors resemble parallel connectors. Be careful not to connect the cable to the wrongport. The voltage used in the SCSI format may damage the parallel interface. SCSI connectors shouldbe clearly labeled.Network Ports and CablesA network port, also called an RJ-45 port, connects a computer to a network. The connectionspeed depends on the type of network port. Standard Ethernet can transmit up to 10Mbps, Fast Ethernet can transmit up to 100 Mbps, and Gigabit Ethernet can transmit up to