In the network， VLAN Trunking Protocol （VTP） is running with a domain name of R1. VLANs 1， 2，3， 4， 5， 10， 20 are active on the network. Suddenly the whole network goes down. No traffic isbeing passed on VLANs 2， 3， 4， 5， 10， 20. However， traffic passes on VLAN 1 and indicates allswitches are operational. Right before the network problem occurred； a switch named SW13 wastaken out of the lab and added to the network. What three configuration issues on SW13 could becausing the network outage？（）

• A、SW13 has a higher VTP configuration revision than the current VTP revision
• B、SW13 is configured as a VTP server with a different domain name
• C、SW13 is configured as a VTP server with the domain name R1
• D、SW13 has a lower VTP configuration revision than the current VTP revision
• E、SW13 is not configured to participate in VTP
• F、SW13 is configured with only VLAN1