The Cisco 15-9044-01 256MB PC2100E Memory is a high-quality server memory module designed for enterprise networking and server applications. With a total capacity of 256 MB and a bus speed of PC-2100 (DDR-266), this ECC RAM module offers reliable performance and error correction capabilities. The DIMM form factor and 184 pins make it compatible with a wide range of server systems, providing a seamless upgrade or replacement option for IT professionals looking to enhance their server's memory capacity.