Most commonly used spanning tree features but how are they different from each other.
"Spanning-tree portfast" instructs the port (on which it is configured) to skip listening and learning state and avoid generating TCN if port goes up/down but ONLY for one vlan configured on the access port.
"Spanning-tree portfast trunk" instructs the same thing on the port (on which it is configured) but for all the allowed vlans on the trunk port at the same time. Due to the nature of trunks to carry traffic for multiple vlans while access port does not, cisco has 2 different for this purpose.
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