CCNA2 MODULE 5

Which port state will switch ports immediately transition to when configured for PortFast?

• forwarding

• blocking

• listening

• learning

After the election of the root bridge has been completed, how will switches find the best paths to the root bridge?

• Each switch will analyze the port states of all neighbors and use the designated ports to forward traffic to the root.

• • Each switch will analyze the sum of all port costs to reach the root and use the path with the lowest cost.

• • Each switch will analyze the sum of the hops to reach the root and use the path with the fewest hops.

• • Each switch will analyze the BID of all neighbors to reach the root and use the path through the lowest BID neighbors.

Which is the default STP operation mode on Cisco Catalyst switches?

• MST

• PVST+

• • Rapid PVST+

• • MSTP

• • RSTP

What value determines the root bridge when all switches connected by trunk links have default STP configurations?

• VLAN ID

• MAC Address

• extended system ID

• bridge priority

During the implementation of Spanning Tree Protocol, all switches are rebooted by the network administrator. What is the first step of the spanning-tree election process?

• • All the switches send out BPDUs advertising themselves as the root bridge.

• • Each switch determines the best path to forward traffic.

• • Each switch determines what port to block to prevent a loop from occurring.

• • Each switch with a lower root ID than its neighbor will not send BPDUs.

Which two concepts relate to a switch port that is intended to have only end devices attached and intended never to be used to connect to another switch? (Choose two.)

• bridge ID

• PortFast

• edge port

• extended system ID

• PVST+

Which three port states are used by Rapid PVST+? (Choose three.)

• • listening

• • blocking

• learning

• forwarding

• discarding

When PVST is running over a switched network, which port state can participate in BPDU frame forwarding based on BPDUs received, but does not forward data frames?

• disabled

• forwarding

• listening

• blocking

Which STP port role is adopted by a switch port if there is no other port with a lower cost to the root bridge?

• • designated port

• alternate

• disabled port

• root port

Which two statements describe a switch port that is configured with PortFast? (Choose two.)

• • The switch port immediately transitions from the listening to the forwarding state.

• • The switch port immediately transitions from blocking to the forwarding state.

• • The switch port sends DHCP requests before transitioning to the forwarding state.

• • The switch port immediately processes any BPDUs before transitioning to the forwarding state.

• • The switch port should never receive BPDUs.