The Cisco MEM-2900-1GB= is a high-quality memory module designed to enhance the performance of Cisco 2901, 2911, and 2921 Integrated Services Routers (ISR). This 1 GB DRAM, supplied as a single DIMM (Dual Inline Memory Module), provides robust and reliable memory expansion, ensuring smoother and more efficient network operations. As a spare part, it guarantees that your network components are always up to date and fully operational.