Which of the following network devices would be MOST likely to perform Network Address Translation (NAT)?

Routers operate at Layer 3 of the OSI model and maintain a NAT translation table that maps private IP addresses and port numbers to the router's single public IP address. This allows multiple internal hosts to share one public IP for outbound Internet traffic. NAT is a core function of the IP routing process and is configured directly on the router's WAN-facing interface.

A switch operates at Layer 2 (data link) using MAC addresses to forward frames within a LAN segment and has no IP routing or NAT capability in an unmanaged configuration.

A hub is a Layer 1 device that simply repeats electrical signals to all ports and has no intelligence to perform any IP-level functions including NAT.

A modem converts signals between digital and analog (or between different digital formats) to interface with the ISP's network, but NAT is performed by the router, not the modem.