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When the switch receives a data frame, it searches the MAC forwarding table based on the destination MAC address of the data frame. The result of the search is one or a group of ports. Based on the result of the search, the data packet is sent to the sending queue of the corresponding port.
A. True
B. False
答案：A
問題 #540
Which of the following bytes can be used for wired phones between two REG devices?
A. E2
B. None of the above
C. E1
D. E1 and E2
答案：C
問題 #541
EPL services use ports and bandwidth exclusively, and different users may need to share resources.
Which of the following methods can be used to isolate user data?
A. MPLS Label
B. VLAN ID
C. QinQ Technology
D. All of the above
答案：D
問題 #542
Which of the following is not a condition for triggering multiplex section protection (MSP)?
A. MS-AIS signal detected
B. R-LOF detected
C. Detection of AU-AIS
D. R-LOS detected
答案：C
問題 #543
QinQ technology can be explained as 802.1Q in 802.1Q. In other words, it is to add another layer of
802.1Q tag on top of the 802.1Q tag. The outer layer is C-VLAN and the inner layer is S-VLAN, which is
20 bytes more than the normal 802.1Q frame.