This get me another question : Why this difference in the same interface (VLAN-100 and Vl100) ?? VLAN-100 is a virtual interface for the actual layer2 vlan; there is no IP address associated with it, and thus it can't have the counters you're tryi...
All layers are shown below:
Physical Layer, Data link layer, Network Layer, Transport layer, Session Layer, presentation Layer, Application Layer all these are three layers.
To know more about 7 layers visit: http://www.traininginchrompet.com/ccna-tr...