single group, effectively creating a single connection with a higher Bandwidth sometimes referred to as a double-barrel approach. This technology also provides a higher degree of fault tolerance because a failure on one port may just mean a slow-down rather than a dropout. By contrast, in software port trunking (SPT), two agents (websites, channels, etc.) are bonded into one with the same effectiveness; i.e., ISDN B1 (64K) plus B2 (64K) equals data throughput of 128K. Types of ports Digital Visual Interface DisplayPort eSATA PS/2 Serial SCSI USB See also Audio and video connector infographic - what PC Ports? References External links TVicHW32, Direct Port I/O from Win32 Interface Ports I/O form PC Out-of-band management