You have connected a Dell switch to the Cisco switch you are configuring and you cannot get a trunk between the two. What must be changed?

A. The Dell switch must be configured to use ISL.
B. The Cisco switch must be configured to use 802.1Q.
C. Both switches need to have duplicated VLAN configurations.
D. VTP needs to be configured on each of the switches.

B. Since the Dell switch cannot support the proprietary protocol of ISL, both switches need to be set up to use 802.1Q.