單項選擇題Which protocol provides a method of sharing VLAN configuration information between switches（）。

A.VTP
B.STP
C.ISL
D.802.1Q
E.VLSM


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1.多項選擇題Which of the following are types of flow control (Choose three.)（）。

A.buffering
B.cut-through
C.windowing
D.congestion avoidance
E.load balancing

2.單項選擇題How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates？（）

A.Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface
B.Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic
C.Configure many sub-interfaces on the same subnet
D.Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces

4.單項選擇題Acknowledgements, sequencing, and flow control are characteristics of which OSI layer（）。

A.Layer2
B.Layer3
C.Layer4
D.Layer5
E.Layer6
F.Layer7

5.單項選擇題When a new trunk link is configured on an IOS based switch, which VLANs are allowed over the link（）。

A.By default, all defined VLANs are allowed on the trunk.
B.Each single VLAN, or VLAN range, must be specified with the switchport mode command.
C.Each single VLAN, or VLAN range, must be specified with the vtp domain command.
D.Each single VLAN, or VLAN range, must be specified with the vlan database command.