Complex sentence: Port mirroring on a Cisco Systems switch is generally referred to as Switched Port ANalyzer (SPAN) or Remote Switched Port ANalyzer (RSPAN); some other vendors have other names for it, such as Roving Analysis Port (RAP) on 3Com switches.
Split into simpler sentences: Port mirroring on a Cisco Systems switch is generally referred to as Switched Port ANalyzer (SPAN) or Remote Switched Port ANalyzer (RSPAN). Other vendors have different names for it, such as Roving Analysis Port (RAP) on 3Com switches.