Two switches at default settings must use an industry-standard trunk allowing VLANs 1–10 and blocking others. How should the interconnecting ports be configured?

To establish an industry-standard trunk, you must explicitly set the port to trunking mode with switchport mode trunk. The industry standard for VLAN tagging is IEEE 802.1Q, so switchport trunk encapsulation dot1q is required. Finally, switchport trunk allowed vlans 1-10 restricts the trunk to only carry VLANs 1 through 10, blocking all others. The first option uses LACP, which is for EtherChannel, not a standard trunk. The second option incorrectly sets the native VLAN to 11, which isn't specified and could cause issues if not matched. The fourth option attempts to use ISL, a Cisco-proprietary encapsulation, and combines trunking with EtherChannel commands, which is not the correct approach for a simple trunk.