Q2
Single choice
Refer to the exhibit:

SW-A is the Layer 3 gateway for:
1. Server-A in VLAN 100, subnet 10.100.100.0/24
2. Client-A in VLAN 20, subnet 10.100.20.0/24
3. Client-B in VLAN 30, subnet 10.100.30.0/24
What must be done to prevent rogue DHCP servers in VLAN 30 on SW-B?