how to use cisco 200 125

200-125 Guide

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  • Exam Number/Code 200-125
  • Product Name CCNA Cisco Certified Network Associate CCNA (v3.0)
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how to use cisco 200 125

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New Cisco 200-125 Exam Dumps Collection (Question 7 - Question 14)

Question No: 7

In a GLBP network, who is responsible for the ARP request?

A. AVF

B. AVG

C. Active Router

D. Standby Router

Answer: B

Explanation:

Members of a GLBP group elect one gateway to be the active virtual gateway (AVG) for that group. Other group members provide backup for the AVG in the event that the AVG becomes unavailable. The AVG assigns a virtual MAC address to each member of the GLBP group. Each gateway assumes responsibility for forwarding packets sent to the virtual MAC address assigned to it by the AVG. These gateways are known as active virtual forwarders (AVFs) for their virtual MAC address.

The AVG is responsible for answering Address Resolution Protocol (ARP) requests for the virtual IP address. Load sharing is achieved by the AVG replying to the ARP requests with different virtual MAC addresses.

Reference: http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html


Question No: 8

When you are troubleshooting an ACL issue on a router, which command would you use to verify which interfaces are affected by the ACL?

A. show ip access-lists

B. show access-lists

C. show interface

D. show ip interface

E. list ip interface

Answer: D

Explanation:

Incorrect:

show ip access-lists does not show interfaces affected by an ACL.


Question No: 9

Refer to the exhibit.

Which rule does the DHCP server use when there is an IP address conflict?

A. The address is removed from the pool until the conflict is resolved.

B. The address remains in the pool until the conflict is resolved.

C. Only the IP detected by Gratuitous ARP is removed from the pool.

D. Only the IP detected by Ping is removed from the pool.

E. The IP will be shown, even after the conflict is resolved.

Answer: A

Explanation:

An address conflict occurs when two hosts use the same IP address. During address assignment, DHCP checks for conflicts using ping and gratuitous ARP. If a conflict is detected, the address is removed from the pool. The address will not be assigned until the administrator resolves the conflict.

(Reference: http://www.cisco.com/en/US/docs/ios/12_1/iproute/configuration/guide/1cddhcp.html)


Question No: 10

Which set of commands is recommended to prevent the use of a hub in the access layer?

A. switch(config-if)#switchport mode trunk switch(config-if)#switchport port-security maximum 1

B. switch(config-if)#switchport mode trunk

switch(config-if)#switchport port-security mac-address 1

C. switch(config-if)#switchport mode access switch(config-if)#switchport port-security maximum 1

D. switch(config-if)#switchport mode access switch(config-if)#switchport port-security mac-address 1

Answer: C

Explanation:

This question is to examine the layer 2 security configuration.

In order to satisfy the requirements of this question, you should perform the following

configurations in the interface mode:

First, configure the interface mode as the access mode

Second, enable the port security and set the maximum number of connections to 1.


Question No: 11

Refer to the exhibit.

The two connected ports on the switch are not turning orange or green. What would be the most effective steps to troubleshoot this physical layer problem? (Choose three.)

A. Ensure that the Ethernet encapsulations match on the interconnected router and switch ports.

B. Ensure that cables A and B are straight-through cables.

C. Ensure cable A is plugged into a trunk port.

D. Ensure the switch has power.

E. Reboot all of the devices.

F. Reseat all cables.

Answer: B,D,F

Explanation:

The ports on the switch are not up indicating it is a layer 1 (physical) problem so we should check cable type, power and how they are plugged in.


Question No: 12

A network engineer wants to allow a temporary entry for a remote user with a specific username and password so that the user can access the entire network over the Internet. Which ACL can be used?

A. standard

B. extended

C. dynamic

D. reflexive

Answer: C

Explanation:

We can use a dynamic access list to authenticate a remote user with a specific username and password. The authentication process is done by the router or a central access server such as a TACACS+ or RADIUS server. The configuration of dynamic ACL can be read here:http://www.cisco.com/en/US/tech/tk583/tk822/technologies_tech_note09186a0080094 524.shtml


Question No: 13

Which router IOS commands can be used to troubleshoot LAN connectivity problems? (Choose three.)

A. ping

B. tracert

C. ipconfig

D. show ip route

E. winipcfg

F. show interfaces

Answer: A,D,F

Explanation:

Ping, show ip route, and show interfaces are all valid troubleshooting IOS commands. Tracert, ipconfig, and winipcfg are PC commands, not IOS.


Question No: 14

A network administrator is troubleshooting the OSPF configuration of routers R1 and R2. The routers cannot establish an adjacency relationship on their common Ethernet link.

The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2. Based on the information in the graphic, what is the cause of this problem?

A. The OSPF area is not configured properly.

B. The priority on R1 should be set higher.

C. The cost on R1 should be set higher.

D. The hello and dead timers are not configured properly.

E. A backup designated router needs to be added to the network.

F. The OSPF process ID numbers must match.

Answer: D

Explanation:

In OSPF, the hello and dead intervals must match and here we can see the hello interval is set to 5 on R1 and 10 on R2. The dead interval is also set to 20 on R1 but it is 40 on R2.


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