What are the primary attack methods of VLAN hopping? (Choose two.)

A.
VoIP hopping

B.
Switch spoofing

C.
CAM-table overflow

D.
Double tagging

Explanation:
BD
VLAN hopping is a computer security exploit, a method of attacking networked resources on a virtual LAN
(VLAN). The basic concept behind all VLAN hopping attacks is for an attacking host on a VLAN to gain access
to traffic on other VLANs that would normally not be accessible. There are two primary methods of VLAN
hopping: switch spoofing and double tagging.
+ In a switch spoofing attack, an attacking host imitates a trunking switch by speaking the tagging and
trunking protocols (e.g. Multiple VLAN Registration Protocol, IEEE 802.1Q, Dynamic Trunking Protocol) used in
maintaining a VLAN. Traffic for multiple VLANs is then accessible to the attacking host.
+ In a double tagging attack, an attacking host connected on a 802.1q interface prepends two VLAN tags to
packets that it transmits.
Source: https://en.wikipedia.org/wiki/VLAN_hopping