Cisco ISR 4431 4GE 3NIM 8G FLASH 4G DRAM IP Base 1Gbps system throughput Product CodeCisco ISR4431/K9Aggregate Throughput500 Mbps to 1 GbpsTotal onboard WAN or LAN 10/100/1000 ports4RJ-45-based ports4SFP-based ports4Enhanced service-module (SM-X) slot0NIM (Network Interface Modules) slots3Onboard ISC slot1DDRM (data plane)2 GB (default) / 2 GB (maximum)DDRM (control/services plane)4 GB (default) / 16 GB (maximum)Flash Memory8 GB (default) / 32 GB (maximum)Power-supply optionsInternal: AC, DC, and PoERack height1 RUDimensions (H x W x D)43.9 x 438.15 x 507.2 mmPackage Weight20.88 Kg