Question 26
The following descriptions about Trunk ports and links are correct ______. (Multiple choice)
Question 27
Which of the following options are the features of 802.1x authentication based on MAC address? (multiple choice)
Question 28
In the process of establishing a PPP session, when the physical layer is available, the PPP link enters the ______ phase.


Question 29
The MAC address table on a layer 2 switch is shown in the figure.

When the switch receives a frame with a destination MAC address of 00-13-72-8E-4B-C1 from the E1/0/2 interface, the switch will ______ the frame.

When the switch receives a frame with a destination MAC address of 00-13-72-8E-4B-C1 from the E1/0/2 interface, the switch will ______ the frame.
Question 30
The rate of the D channel in ISDN PRI is ______.