Refer to the exhibit. A new switch, SW3, has been added to the network. The network administrator determines that VLAN information is not propagating to SW3. Which command will remedy the problem?

VTP (VLAN Trunking Protocol) requires all switches in the same VTP domain to have matching domain names before VLAN information will propagate. SW3 likely has a different VTP domain name (or none configured), so it's not receiving VLAN updates from SW1 and SW2. Setting 'vtp domain Cisco1' on SW3 will match the domain name, allowing VTP advertisements to be processed. VTP version should match across switches, but domain mismatch is the more common issue preventing propagation.