CCNA 2A Final

M5: Which statement describes STP?

• STP is a Layer 2 routing protocol.

• STP is a Layer 3 routing protocol for Ethernet LANs.

• STP is a Layer 2 loop prevention protocol for Ethernet LANs.

• STP is a Layer 3 loop prevention protocol for IP networks.

M5: Without STP on the Ethernet LAN, which three types of frames could cause a catastrophic loop in the network? (Choose three.)

• Unicast

• Unknown unicast

• Multicast

• Broadcast

M5: What device is elected by the Spanning Tree Algorithm? All other switches determine a single least-cost path to this device.

• root bridge

• dedicated bridge

• default gateway

• default gateway

M5: By default (without any configuration on a switch), what will determine which switch is the root bridge?

• The bridge priority

• The extended system ID

• The MAC address of the switch

• The bridge ID

M5: The root bridge will be the switch with the:

• Lowest bridge ID

• Highest bridge ID

• Lowest port priority

• Highest port priority

M5: The port closest to the root bridge in terms of least overall cost (best path) to the root bridge is the:

• Designated port

• Blocked port or non-designated port

• Root port

• Routed Port

M5: The port on the segment (with two switches) that has the lowest path cost to the root bridge is the:

• Designated port

• Blocked port or non-designated port

• Root port

• Routed Port

M5: Which of the following ports will forward Ethernet frames? (Choose two.)

• Designated port

• Blocked port or non-dedicated port

• Root port

M5: The sum of individual port costs along the path from the switch to the root bridge is known as the:

• Least cost path

• Shortest path cost

• Best path cost

• Root path cost

M5: How often does a switch send a BPDU?

• Every 2 seconds

• Every 15 seconds

• Every 20 seconds

• Only when there is a change in the topology