An Administrator Recently Implemented New SOHO Routers for a Company's

Multiple Choice

An administrator recently implemented new SOHO routers for a company's teleworking employees. Before deploying the routers, the administrator changed the default credentials and disabled unnecessary services. Within a few days of deployment, hackers gained access to the routers. Which of the following is the MOST important thing the administrator forgot to do?

A) Disable unused physical router ports.
B) Generate new encryption keys.
C) Upgrade the router firmware.
D) Create a database of file hashes on the router.