Home » Cisco » 200-120 » Which two protocols are used by bridges and/or switches to prevent loops in a layer 2 network?
Which two protocols are used by bridges and/or switches to prevent loops in a layer 2 network? (Choose two.)
A. 802.1d
B. VTP
C. 802.1q
D. STP
E. SAP
Correct Answer: AD
Explanation/Reference:
Explanation:
This question is to examine the STP protocol.
STP (802.1d) is used to prevent Layer 2 loops. 802.1q is a Frame Relay protocol which belongs to VLAN.
SAP is a concept of the OSI model.
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