What is the major difference between the IEEE 802.11b WLAN and the IEEE 802.11g WLAN?  What does gated service mean in a token-passing network?  Which node is responsible for removing a frame from a token ring network?  How does a node indicate that it has accepted a frame in a token ring network? 10What does frame bursting mean and where is it used? What is a VLAN?  What is the difference between a Layer 2 VLAN and a Layer 3 VLAN?  Name one advantage of a port-based VLAN over a MAC address-based VLAN.  Name one advantage of a MAC address-based VLAN over a port-based VLAN.