Refer to Exhibit:

How many broadcast domains are shown in the graphic assuming only the default VLAN is
configured on the switches?

A.
one

B.
two

C.
six

D.
twelve

Explanation:
Only router can break up broadcast domains but in this exhibit no router is used so there is only 1
broadcast domain.
For your information, there are 7 collision domains in this exhibit (6 collision domains between
hubs & switches + 1 collision between the two switches).