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200-125 Cisco Certified Network Associate (CCNA)

in 200-125, Cisco, Demo on February 12, 2018

Cisco CCNA 200-125 Latest & Updated Exam Questions for candidates to study and pass exams fast. Cisco CCNA 200-125 exam dumps are frequently updated and reviewed for passing the exams quickly and hassle free!
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Number: 200-125
Passing Score: 800
Time Limit: 120 min

Exam Name: CCNA Cisco Certified Network Associate

QUESTION 1
You are the network administrator for your company and have configured Cisco Discovery Protocol (CDP) in your network. You recently noticed that
when devices send large numbers of CDP neighbor announcements, some devices are crashing. You decide to disable CDP on the router.
Which command should you use to achieve the objective?

A. no cdp run
B. set cdp disable
C. no cdp enable
D. no cdp advertise-v2

Correct Answer: A

Explanation/Reference:
Explanation:
You should use the no cdp run command to disable CDP on the router. Due to a known vulnerability regarding the handling of CDP by Cisco routers and switches when devices send large numbers of CDP neighbor announcements, some devices can crash or cause abnormal system behavior. To overcome this problem, you can disable CDP for the entire router by using the no cdp run command.
You cannot use the set cdp disable command to disable CDP on the router. This command disables CDP on an entire Catalyst switch.
You cannot use the no cdp enable command to disable CDP on the router. This command disables CDP on a specific interface.
You cannot use the no cdp advertise-v2 command to disable CDP on the router. This command disables CDPv2 advertisements.

Objective:
LAN Switching Fundamentals
Sub-Objective:
Configure and verify Layer 2 protocols

References:
Cisco > Support > Using Cisco Discovery Protocol
Cisco > Support > Technology Support > Network Management > Cisco’s Response to the CDP Issue > Document ID: 13621

QUESTION 2
Which of the following protocols allow the root switch location to be optimized per VLAN? (Choose all that apply.)
A. PVST+
B. RSTP
C. PVRST
D. STP

Correct Answer: AC

Explanation/Reference:
Explanation:
Both Per VLAN Spanning Tree Plus (PVST+) and Per VLAN Rapid Spanning Tree (PVRST) protocols allow for a spanning tree instance for each VLAN, allowing for the location optimization of the root bridge for each VLAN. These are Cisco proprietary enhancements to the 802.1d and 802.1w standards, respectively.

Rapid Spanning Tree Protocol (RSTP) is another name for the 802.1w standard. It supports only one instance of spanning tree.
Spanning Tree Protocol (STP) is another name for the 802.1d standard. It supports only one instance of spanning tree.

Objective:
LAN Switching Fundamentals
Sub-Objective:
Configure, verify, and troubleshoot STP protocols

References:
Cisco Home > Support > Technology Support > LAN Switching

QUESTION 3
Your assistant just finished configuring a small test network as part of his training. The network is configured as shown in the diagram below:

 

When testing the configuration, you find that Host A in the diagram cannot ping Host B.
Which of the following pairs of connections are required to be in the same subnet for Host A to be able to ping Host B? (Choose all that apply.)

A. The IP address of Host A and the IP address of the Fa0/0 interface of Router A
B. The IP address of the Fa0/0 interface of Router A and the IP address of the Fa0/0 interface of Router B
C. The IP address of Host A and the IP address of the Fa0/0 interface of Router B
D. The IP address of Host A and the IP address of Switch A
E. The IP address of the S 0/0 interface of Router A and the IP address of the S 0/0 interface of Router B
F. The IP address of Host A and the IP address of Host B
G. The IP address of Host B and the IP address of the Fa0/0 interface of Router B

Correct Answer: AEG

Explanation/Reference:
Explanation:

The following pairs of connections are required to be in the same subnet:

  • the IP address of Host A and the IP address of the Fa0/0 interface of Router A
  • the IP address of the S 0/0 interface of Router A and the IP address of the S 0/0 interface of Router B
  • the IP address of Host B and the IP address of the Fa0/0 interface of Router B

When troubleshooting a correctly labeled network diagram for IP addressing problems, one must start on one end and trace each link in one direction, ensuring at each step that the interfaces are in the same subnet. A switch simply passes the packet to the router; therefore, the IP address of the switch is not important. It performs its job even if it has no IP address

Moving from Host A to Host B, however, the following links must be in the same subnet:

  • The IP address of Host A and the IP address of the Fa0/0 interface of Router A
  • The IP address of the S0/0 interface of Router A and the IP address of the S0/0 interface of Router B
  • The IP address of Host B and the IP address of the Fa0/0 interface of Router B

Neither of the switch addresses is important to the process.

If all other routing issues are correct, it is also not required for Host A and Host B to be in the same subnet.

QUESTION 4
DRAG DROP
Click and drag the components on the left to their corresponding layers of the Open Systems Interconnection (OSI) model on the right.

Select and Place:

Correct Answer:

Page Number:
1 | 2
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Exam Code: 200-125
Exam Name: CCNA Cisco Certified Network Associate
File format: PDF

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