Note:
① EHWIC slot ⑤ USB serial port
② Auxiliary port ⑥ RJ-45 serial console port
③ GE 0/0（down）and 0/1(up) ⑦ USB port
④ Input power connector ⑧ POE
* Cisco 1921/K9 supports 1 integrated EHWIC slots for flexible configurations. It supports two modules:
1. 1 double wide HWIC-D or single wide EHWIC/HWIC module or 2 single wide EHWIC/HWIC module.
2. High-speed USB 2.0 ports enable another mechanism secure token capabilities and storage.
