Q.

Which of the following is an example of data-link layer vulnerability?

A. physical theft of data
B. vlan circumvention
C. route spoofing
D. weak or non-existent authentication
Answer» B. vlan circumvention
Explanation: vlan circumvention is an example of data-link layer vulnerability. mac address spoofing, as well as switches, may be forced for flooding traffic to all vlan ports are some other examples of data-link layer vulnerability.
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