Why is BPDU guard typically enabled on PortFast-enabled access ports?

To speed up the port's transition to forwarding

To prevent the port from sending BPDUs

To protect against unauthorized switches being connected to the port

To allow the port to become a root port

A network has three switches: SW1, SW2, and SW3. SW1 has bridge priority 4096, SW2 has 8192, and SW3 has 32768. All switches are in the same VLAN. The MAC addresses are SW1=aaaa.aaaa.aaaa, SW2=bbbb.bbbb.bbbb, SW3=cccc.cccc.cccc. Which switch becomes the root bridge?

SW3, because it has the highest priority.

SW1, because it has the lowest bridge priority.

SW2, because it has the lowest MAC address.

All switches will become root for different VLANs.

A switch has just been powered on and is running Rapid PVST+. One of its ports is connected to a root bridge and is transitioning through the port states. Which sequence of port states does the port go through before it reaches the forwarding state?

Discarding, forwarding, learning

Discarding, learning, forwarding

Listening, discarding, forwarding

Blocking, listening, learning, forwarding

CiscoCertified Network Associate (CCNA)

Domain 2Objective 5

2.5 Interpret Basic Operations of Rapid PVST+ Spanning Tree Protocol 200-301 Practice Questions (Page 6)

Part of the Network Access domain, which accounts for 20% of the 200-301 exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~10–16 in this domain), expect 1–2 from this objective — we provide 36 practice questions to prepare you well beyond it. (estimate)

36questions here

8free pages

9concepts

20%of the exam

Questions 26–30

26foundation · easy
Why is BPDU guard typically enabled on PortFast-enabled access ports?
Select an answer first
27application · easy
A network has three switches: SW1, SW2, and SW3. SW1 has bridge priority 4096, SW2 has 8192, and SW3 has 32768. All switches are in the same VLAN. The MAC addresses are SW1=aaaa.aaaa.aaaa, SW2=bbbb.bbbb.bbbb, SW3=cccc.cccc.cccc. Which switch becomes the root bridge?
Select an answer first
28application · medium
In a Rapid PVST+ topology, two switches are connected by two parallel links. Both switches have the same root path cost to the root bridge. One link is selected as the designated port on both ends, and the other link is blocked. What is the role of the blocked port on the switch with the higher bridge ID?
Select an answer first
29application · medium
A switch has just been powered on and is running Rapid PVST+. One of its ports is connected to a root bridge and is transitioning through the port states. Which sequence of port states does the port go through before it reaches the forwarding state?
Select an answer first
30application · medium
An administrator is configuring a switch port that connects to a device that does not participate in spanning tree and should not receive or send BPDUs. The port is also configured with PortFast. Which feature should be enabled to prevent BPDU processing on this port?
Select an answer first

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2.5 Interpret Basic Operations of Rapid PVST+ Spanning Tree Protocol 200-301 Practice Questions (Page 6)

Questions 26–30

Why is BPDU guard typically enabled on PortFast-enabled access ports?

A network has three switches: SW1, SW2, and SW3. SW1 has bridge priority 4096, SW2 has 8192, and SW3 has 32768. All switches are in the same VLAN. The MAC addresses are SW1=aaaa.aaaa.aaaa, SW2=bbbb.bbbb.bbbb, SW3=cccc.cccc.cccc. Which switch becomes the root bridge?

A switch has just been powered on and is running Rapid PVST+. One of its ports is connected to a root bridge and is transitioning through the port states. Which sequence of port states does the port go through before it reaches the forwarding state?

An administrator is configuring a switch port that connects to a device that does not participate in spanning tree and should not receive or send BPDUs. The port is also configured with PortFast. Which feature should be enabled to prevent BPDU processing on this port?

Keep studying — Network Access