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- Question
You have two switches connected together with two crossover cables for redundancy, and STP is disabled. Which of the following will happen between the switches?
Options- A. The routing tables on the switches will not update
- B. The MAC forward/;filter table will not update on the switch
- C. Broadcast storms will occur on the switched network
- D. The switches will automatically load-balance between the two links
- Correct Answer
- Broadcast storms will occur on the switched network
ExplanationIf spanning tree is disabled on a switch and you have redundant links to another switch, broadcast stroms will occur, among other possible problems.
- 1. You want to run the new 802.1w on your switches. which of the following would enable this protocol?
Options- A. Switch (config) # Spanning-tree mode rapid-pvst
- B. Switch#spanning-tree mode rapid-pvst
- C. Switch (config)#spanning-tree mode 802.1w
- D. Switch#spanning-tree mode 802.1w Discuss
- 2. What command will display the forward / filter table?
Options- A. Show mac filter
- B. show run
- C. show mac address-table
- D. show mac filter-table Discuss
- 3. If a switch receives a frame and the source MAC address is not in the MAC address table but the destination address is, what will the switch do with the frame?
Options- A. Discard it and send an error message back to the originating host
- B. Flood the network with the frame
- C. Add the source addres and port to the MAC address table and forward the frame out the destination port
- D. Add the destination to the MAC address table and then forward the frame Discuss
- 4. Your switch has a port status LED that is alternating between green and amber. What could this indicate?
Options- A. The port is experiencing errors
- B. The port is shut down
- C. The port is in STP blocking mode
- D. Nothing, this is normal. Discuss
- 5. What does a switch do when a frame is received on an interface and the destination hardware address is unknown or not in the filter table?
Options- A. Forwards the switch to the first available link
- B. Drops the frame
- C. Floods the network with the frame looking for the device
- D. Sends back a message to the originating station asking for a name resolution Discuss
- 6. Which proprietary Cisco STP extensions would put a switch port into err-disabled if a BPDU is received on this port? Discuss
- 7. Which Cisco 802.1d extension stops BPDU from being transmitted out a port? Discuss
- 8. Which switching technology reduces the size of a broadcast domain?
Options- A. ISL
- B. 802.1Q
- C. VLANs
- D. STP Discuss
- 9. You want to improve network performance by increasing the bandwidth available to hosts and limit the size of the broadcast domains. Which of the following options will achieve this goal?
Options- A. Managed hubs
- B. Bridges
- C. Switches
- D. Switches configured with VLANs Discuss
- 10. A switch has been configured configured for three different VLANs : VLAN2, VLAN3 and VLAN4. A router has been added to provide communication between the VLANs. What minimum type of interface necessary on the router if only one connection is to be made between the router and the switch?
Options- A. 10Mbps Ethernet
- B. 56Kbps Serial
- C. 100Mbps Ethernet
- D. 1Gbps Ethernet Discuss
CISCO Certification problems
Search Results
Correct Answer: Switch (config) # Spanning-tree mode rapid-pvst
Explanation:
802.1w is the also called Rapid Spanning Tree Protocol. It is not enabled by default on Cisco switches, but it is a better STP to run since it has all the fixes that the Cisco extensions provide with 802.1d
Correct Answer: show mac address-table
Explanation:
The Command show mac address-table displays the forward/filter table on the switch.
Correct Answer: Add the source addres and port to the MAC address table and forward the frame out the destination port
Explanation:
Since the source MAC address is not in the MAC address table, the switch will add the source address and the port it is connected to into the MAC address table and then forward the frame to the outgoing port.
Correct Answer: The port is experiencing errors
Explanation:
When you connect to a switch port, at first the link lights are orange/amber, and then they turn green, indicating normal operation. If the link light is blinking, you have a problem.
Correct Answer: Floods the network with the frame looking for the device
Explanation:
Switches flood all frames that have an unknown destination address. If a device answers the frame, the switch will update the MAC address table to reflect the location of the device.
Correct Answer: BPDUGuard
Correct Answer: PortFast
Correct Answer: VLANs
Explanation:
Virtual LANs break up broadcast domains in layer 2 switched internetworks.
Correct Answer: Switches configured with VLANs
Explanation:
By creating and implementing VLANs in your switched network, you can break up broadcast domains at layer2. For hosts on different VLANs to communicate, you must have a router or layer 3 switch.
Correct Answer: 100Mbps Ethernet
Explanation:
Although you can use either 100Mbps or 1Gbps Ethernet, the 100Mbps is necessary at a minimum and is the best answer to this question. You need to trunk the link from the switch to the router to make this connection work with inter-VLAN communication.
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