What is a characteristic of the PortFast feature?
- PortFast enables a Cisco Catalyst switch to move a port into blocking state when an attached workstation link comes up.
- A trunk port can be configured with PortFast if it connects to a hypervisor host.
- PortFast can only be used for STP host ports.
- PortFast prevents alternative ports from becoming designated ports.
Explanation: One of the major benefits of the STP PortFast feature is that the access ports bypass the earlier 802.1D STP states (learning and listening) and forward traffic immediately. PortFast can be enabled on trunk links, but only with ports that are connecting to a single host, such as a server with only one NIC that is running a hypervisor with VMs on different VLANs.
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