What Layer 2 attack is mitigated by disabling Dynamic Trunking Protocol?a.VLAN hoppingb.DHCP spoofingc.ARP poisoningd.ARP spoofing

The Layer 2 attack that is mitigated by disabling Dynamic Trunking Protocol is a. VLAN hopping.

Here's a step-by-step explanation:

1. VLAN hopping is a network attack where an attacker can send packets to a network port that is not normally accessible from a given end system.

2. This is achieved by taking advantage of the automatic trunking protocol, like Dynamic Trunking Protocol (DTP), which is used to negotiate trunking on a link between two VLAN-aware switches.

3. DTP can be exploited by an attacker to make the switch port enter into trunking mode, which allows the attacker to access traffic across multiple VLANs.

4. By disabling DTP, you prevent the switch port from entering into trunking mode, thus mitigating the risk of VLAN hopping attacks.