After properly configuring multiple VLANs, an administrator has decided to secure its VLAN network. Which three steps are required to secure this environment? (Choose three.)()

A .  If a port is connected to a foreign device make sure to disable CDP, DTP, RPR, PAgP, UDLP, and any other unnecessary protocols, and enable UplinkFast/BPDU guard on it. B .  Enable root guard feature to prevent a directly or indirectly connected STP-capable device from affecting the location of the root bridge. C .  Configure VTP domains appropriately or turn off VTP altogether to limit or prevent possible undesirable protocol interaction with regards to the network-wide VLAN configuration. D .  Set the native VLAN ID to match the port VLAN ID of any 802.1q trunk to prevent spoofing. E .  Disable all unused ports and place them in an unused VLAN to avoid unauthorized access.

时间:2022-09-03 20:45:27 所属题库:CCNP(642-372)题库

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