[Free] 2017(July) EnsurePass Examcollection Cisco 200-125 Dumps with VCE and PDF 281-290

2017 July Cisco Official New Released 200-125
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CCNA Cisco Certified Network Associate CCNA (v3.0)

Question No: 281 DRAG DROP – (Topic 7)

Drag each category on the left to its corresponding router output line on the right. Each router output line is the result of a show ip interface command. Not all categories are used.






A simple way to find out which layer is having problem is to remember this rule: 鈥渢he first statement is for Layer 1, the last statement is for Layer 2 and if Layer 1 is down then surely Layer 2 will be down too鈥? so you have to check Layer 1 before checking Layer 2. For example, from the output 鈥淪erial0/1 is up, line protocol is down鈥?we know that it is a layer 2 problem because the first statement (Serial0/1 is up) is good while the last statement (line protocol is down) is bad. For the statement 鈥淪erial0/1 is down, line protocol is down鈥? both layers are down so the problem belongs to Layer 1.

There is only one special case with the statement 鈥?… is administrator down, line protocol is down鈥? In this case, we know that the port is currently disabled and shut down by the administrators.

Question No: 282 – (Topic 7)

An administrator is trying to ping and telnet from SwitchC to RouterC with the results shown below.


Click the console connected to RouterC and issue the appropriate commands to answer the questions.






Which will fix the issue and allow ONLY ping to work while keeping telnet disabled?

  1. Correctly assign an IP address to interface fa0/1.

  2. Change the ip access-group command on fa0/0 from 鈥渋n鈥?to 鈥渙ut鈥?

  3. Remove access-group 106 in from interface fa0/0 and add access-group 115 in.

  4. Remove access-group 102 out from interface s0/0/0 and add access-group 114 in

  5. Remove access-group 106 in from interface fa0/0 and add access-group 104 in.

Answer: E Explanation:

Let’s have a look at the access list 104:


The question does not ask about ftp traffic so we don’t care about the two first lines. The 3rd line denies all telnet traffic and the 4th line allows icmp traffic to be sent (ping).

Remember that the access list 104 is applied on the inbound direction so the 5th line 鈥渁ccess-list 104 deny icmp any any echo-reply鈥?will not affect our icmp traffic because the 鈥渆cho-reply鈥?message will be sent over the outbound direction.

Question No: 283 – (Topic 7)

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

  1. ping

  2. tracert

  3. ipconfig

  4. show ip route

  5. winipcfg

  6. show interfaces

Answer: A,D,F


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

Question No: 284 – (Topic 7)

What are the three things that the Netflow uses to consider the traffic to be in a same flow? (Choose three)

  1. IP address

  2. Interface name

  3. Port numbers

  4. L3 protocol type

  5. MAC address

Answer: A,C,D Explanation:

What is an IP Flow?

Each packet that is forwarded within a router or switch is examined for a set of IP packet attributes. These attributes are the IP packet identity or fingerprint of the packet and determine if the packet is unique or similar to other packets.

Traditionally, an IP Flow is based on a set of 5 and up to 7 IP packet attributes. IP Packet attributes used by NetFlow:

IP source address

IP destination address

Source port

Destination port

Layer 3 protocol type

Class of Service

Router or switch interface

Question No: 285 – (Topic 7)

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.)

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

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

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

  4. Ensure the switch has power.

  5. Reboot all of the devices.

  6. 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: 286 – (Topic 7)

What command visualizes the general NetFlow data on the command line?

  1. show ip flow export

  2. show ip flow top-talkers

  3. show ip cache flow

  4. show mls sampling

  5. show mls netflow ip

Answer: C Explanation:

The following is an example of how to visualize the NetFlow data using the CLI. There are three methods to visualize the data depending on the version of Cisco IOS Software. The traditional show command for NetFlow is quot;show ip cache flowquot; also available are two forms of top talker commands. One of the top talkers commands uses a static configuration to view top talkers in the network and another command called dynamic top talkers allows real-time sorting and aggregation of NetFlow data. Also shown is a show MLS command to view the hardware cache on the Cisco Catalyst 6500 Series Switch.

The following is the original NetFlow show command used for many years in Cisco IOS Software. Information provided includes packet size distribution; basic statistics about number of flows and export timer setting, a view of the protocol distribution statistics and the NetFlow cache.

The 鈥渟how ip cache flow鈥?command displays a summary of the NetFlow accounting statistics.


Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/ios- netflow/prod_white_paper0900aecd80406232.html

Question No: 287 – (Topic 7)

What Cisco IOS feature can be enabled to pinpoint an application that is causing slow network performance?

  1. SNMP

  2. Netflow

  3. WCCP

  4. IP SLA

Answer: B Explanation:

Netflow can be used to diagnose slow network performance, bandwidth hogs and bandwidth utilization quickly with command line interface or reporting tools.

Reference: http://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/ios- netflow/prod_white_paper0900aecd80406232.html

Question No: 288 – (Topic 7)

Refer to the exhibit.


A problem with network connectivity has been observed. It is suspected that the cable connected to switch port Fa0/9 on Switch1 is disconnected. What would be an effect of this cable being disconnected?

  1. Host B would not be able to access the server in VLAN9 until the cable is reconnected.

  2. Communication between VLAN3 and the other VLANs would be disabled.

  3. The transfer of files from Host B to the server in VLAN9 would be significantly slower.

  4. For less than a minute, Host B would not be able to access the server in VLAN9. Then normal network function would resume.

Answer: D Explanation:

Spanning-Tree Protocol (STP) is a Layer 2 protocol that utilizes a special-purpose algorithm to discover physical loops in a network and effect a logical loop-free topology. STP creates a loop-free tree structure consisting of leaves and branches that span the entire Layer 2 network. The actual mechanics of how bridges communicate and how the STP algorithm works will be discussed at length in the following topics. Note that the terms

bridge and switch are used interchangeably when discussing STP. In addition, unless otherwise indicated, connections between switches are assumed to be trunks.

Question No: 289 – (Topic 7)

Refer to the exhibit.


HostA cannot ping HostB. Assuming routing is properly configured, what is the cause of this problem?

  1. HostA is not on the same subnet as its default gateway.

  2. The address of SwitchA is a subnet address.

  3. The Fa0/0 interface on RouterA is on a subnet that can#39;t be used.

  4. The serial interfaces of the routers are not on the same subnet.

  5. The Fa0/0 interface on RouterB is using a broadcast address.

Answer: D Explanation:

Now let’s find out the range of the networks on serial link: For the network

Increment: 32

Network address:

Broadcast address: For the network Increment: 32

Network address:

Broadcast address:

-gt; These two IP addresses don’t belong to the same network and they can’t see each other.

Question No: 290 DRAG DROP – (Topic 7)

A user is unable to connect to the Internet. Based on the layered approach to troubleshooting and beginning with the lowest layer, drag each procedure on the left to its proper category on the right.






The question asks us to 鈥渂egin with the lowest layer鈥?so we have to begin with Layer 1: verify physical connection; in this case an Ethernet cable connection. For your information, 鈥渧erify Ethernet cable connection鈥?means that we check if the type of connection (crossover, straight-through, rollover…) is correct, the RJ45 headers are plugged in, the signal on the cable is acceptable…

Next we 鈥渧erify NIC operation鈥? We do this by simply making a ping to the loopback interface If it works then the NIC card (layer 1, 2) and TCP/IP stack (layer 3) are working properly.

Verify IP configuration belongs to layer 3. For example, checking if the IP can be assignable for host, the PC’s IP is in the same network with the gateway…

Verifying the URL by typing in your browser some popular websites like google.com, microsoft.com to assure that the far end server is not down (it sometimes make we think we can’t access to the Internet). We are using a URL so this step belongs to layer 7 of the OSI model.

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