单项选择题
A receiving host computes the checksum on a frame and determines that the frame is damaged.Theframe is then discarded.At which OSI layer did this happen？（）
A.session
B.network
C.physical
D.data link
E.transport
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相关考题
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多项选择题
Which two benefits are provided by creating VLANs? （）
A.added security
B.dedicated bandwidth
C.provides segmentation
D.allows switches to route traffic between subinterfaces
E.contains collisions -
多项选择题
Which of the following are key characteristics of PPP (Choose three.)（）。
A.can be used over analog circuits
B.maps Layer 2 to Layer 3 address
C.encapsulates several routed protocols
D.supports IP only
E.provides error correction -
多项选择题
Whichthreeelementsmustbeusedwhenyouconfigurearouterinterfaceforvlantrunking？（）
A.one IP network or subnetwork for each subinterface
B.subinterface numbering that matches vlan tages
C.subinterface encapsulation identifiers that match vlan tags
D.a management domain for each subinterface
E.one physical interface for each subinterface
F.one subinterface per vlan
