A network administrator is troubleshooting a newly installed link between a switch and a router. The administrator notices that the link is operational but experiencing intermittent connectivity and slow transfer rates. After reviewing the switch and router configurations, the administrator observes that the switch port is set to full-duplex, but there is no duplex setting visible for the router interface. What is the MOST likely cause of this network issue?
The router interface has defaulted to half-duplex, causing a duplex mismatch.
The Ethernet cable used to connect the devices is damaged.
The router interface is configured for an incompatible protocol.
The switch port is configured with an incorrect speed setting.