Which of the following is true about the default settings of a Cisco Catalyst Switch?

The correct option highlights that MAC learning and Spanning Tree Protocol (STP) are enabled by default on a Cisco Catalyst switch. This is a crucial feature for switch functionality because MAC learning allows the switch to build its MAC address table by recording the source MAC addresses of incoming frames. This capability is essential for the switch to forward traffic efficiently to the correct destination.

Additionally, STP is vital for preventing loops in the network that can cause broadcast storms and other network issues. STP ensures a loop-free topology and is automatically enabled to maintain network stability.

Regarding the other options: while it is true that Cisco switches do come with certain interfaces that may initially be administratively down (such as trunk ports), many interfaces are active and ready to use. Only VLAN 1 being active is misleading because upon startup, although VLAN 1 is the default management VLAN, additional VLANs can be created and activated. Lastly, autonegotiation is typically enabled on Cisco Catalyst switches to allow ports to automatically negotiate speed and duplex settings with connected devices, so saying that it's disabled does not represent the default configuration accurately.