CISCO Certification problems
- 1. 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
Correct Answer: show mac address-table
Explanation:
The Command show mac address-table displays the forward/filter table on the switch.
- 2. 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
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
- 3. 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 Discuss
Correct Answer: Broadcast storms will occur on the switched network
Explanation:
If spanning tree is disabled on a switch and you have redundant links to another switch, broadcast stroms will occur, among other possible problems.
- 4. Which proprietary Cisco STP extensions would put a switch port into err-disabled if a BPDU is received on this port? Discuss
Correct Answer: BPDUGuard
- 5. Which Cisco 802.1d extension stops BPDU from being transmitted out a port? Discuss
Correct Answer: PortFast
- 6. Which switching technology reduces the size of a broadcast domain?
Options- A. ISL
- B. 802.1Q
- C. VLANs
- D. STP Discuss
Correct Answer: VLANs
Explanation:
Virtual LANs break up broadcast domains in layer 2 switched internetworks.
- 7. 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
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.
- 8. 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
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.
- 9. Which of the following commands sets a trunk port on a 2960 switch?
Options- A. truck on
- B. truck all
- C. switchport trunk on
- D. switchport mode trunk Discuss
Correct Answer: switchport mode trunk
Explanation:
To set a switch port to trunk mode, which allows the data of all VLAN information to pass down the link, use the switchport mode trunk command.
- 10. You connect a host to a switch port, but the new host cannot log into the server that is plugged into the same switch. What could the problem be?
Options- A. The router is not configured for the new host
- B. The VTP configuration on the switch is not updated for the new host
- C. The host has an invalid MAC address
- D. The switch port the host is connected to is not configured with the correct VLAN membership Discuss
Correct Answer: The switch port the host is connected to is not configured with the correct VLAN membership
Explanation:
This question is a little Vague, but the best answer is that the VLAN membership for the port is not configured
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