The IBM Universal 4-Port 10/100 Ethernet Adapter (#4961) is a single slot, long, 64-bit, 33 MHz PCI adapter supporting four industry-standard Ethernet 10 Base-T or 100 Base-T interfaces either half or full duplex.Each port is provided with its own RJ-45 connector for attachment to standard CAT-3/5 Unshielded Twisted Pair (UTP) cable. The adapter is IEEE 802.3u-compatible and provides full auto-negotiation for detecting speed and duplex capability across each port.Network boot capability and Network Install Manager (NIM) capability are available using this adapter if no specific limitation is stated.