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Switch Questions 2

November 20th, 2018 Go to comments

Question 1


When you connect an IP phone to a switch using a trunk link, it can cause high CPU utilization in the switches. As all the VLANs for a particular interface are trunked to the phone, it increases the number of STP instances the switch has to manage. This increases the CPU utilization. Trunking also causes unnecessary broadcast / multicast / unknown unicast traffic to hit the phone link.

In order to avoid this, remove the trunk configuration and keep the voice and access VLAN configured along with Quality of Service (QoS). Technically, it is still a trunk, but it is called a Multi-VLAN Access Port (MVAP). Because voice and data traffic can travel through the same port, you should specify a different VLAN for each type of traffic. You can configure a switch port to forward voice and data traffic on different VLANs. Configure IP phone ports with a voice VLAN configuration. This configuration creates a pseudo trunk, but does not require you to manually prune the unnecessary VLANs.

The voice VLAN feature enables access ports to carry IP voice traffic from an IP phone. You can configure a voice VLAN with the “switchport voice vlan …” command under interface mode. The full configuration is shown below:

Switch(config)#interface fastethernet0/1
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 10
Switch(config-if)#switchport voice vlan 20

Reference: http://www.cisco.com/c/en/us/support/docs/switches/catalyst-4500-series-switches/69632-configuring-cat-ip-phone.html

Question 2


To remote access to SwitchB, it must have a management IP address on a VLAN on that switch. Traditionally, we often use VLAN 1 as the management VLAN (but in fact it is not secure).

In the exhibit, we can recognize that the Management Workstation is in a different subnet from the SwitchB. For intersubnetwork communication to occur, you must configure at least one default gateway. This default gateway is used to forward traffic originating from the switch only, not to forward traffic sent by devices connected to the switch.

Question 3


Microsegmentation is a network design (functionality) where each workstation or device on a network gets its own dedicated segment (collision domain) to the switch. Each network device gets the full bandwidth of the segment and does not have to share the segment with other devices. Microsegmentation reduces and can even eliminate collisions because each segment is its own collision domain -> A is correct.

Note: Microsegmentation decreases the number of collisions but it increases the number of collision domains.

D and E are correct based on the theory of STP and VLAN.

Question 4

Question 5


The MAC address of 00b0.d056.efa4 has not been learned in its MAC address table so Switch-1 will broadcast the frame out all of its ports except the port from which the data originated.

Question 6


“ping” command is used to send echo requests and receive echo replies.

Question 7

Question 8


We can check the MAC address table with the command “show mac address-table”:


As we can see here, the “MAC address” field is the source MAC address and the “Ports” field are the ports of the switch from which the frames (with corresponding source MAC address) were received.

Question 9


To switch frames between LAN ports efficiently, the switch maintains an address table. When the switch receives a frame, it associates the media access control (MAC) address of the sending network device with the LAN port on which it was received.

The switch dynamically builds the address table by using the MAC source address of the frames received. When the switch receives a frame for a MAC destination address not listed in its address table, it floods the frame to all LAN ports of the same VLAN except the port that received the frame. When the destination station replies, the switch adds its relevant MAC source address and port ID to the address table. The switch then forwards subsequent frames to a single LAN port without flooding all LAN ports.

Reference: http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/CLIConfigurationGuide/MACAddress.html

When the switch dynamically builds the MAC address table, it also specifies the time before an entry ages out and is discarded from the MAC address table. The default is 300 seconds.

Question 10

Question 11

Comments (45) Comments
  1. Michael
    June 13th, 2017

    Passed today, used the 747q dumps. you can find them on https://drive.google.com/open?id=0B5mAFqgydmCzc3BmR214LWFuTDg

  2. Reginald
    June 19th, 2017

    Thanks Michael, the dumps are valid.

  3. Viyasar
    July 4th, 2017

    For question 6
    Isn’t it supposed to send ARP request through all ports, learn the MAC address and then forward the packet?

  4. Viyasar
    July 7th, 2017

    For question 5
    Isn’t it supposed to send ARP request through all ports, learn the MAC address and then forward the packet?

  5. Becky
    July 8th, 2017

    It is Arp or broadcast

  6. Anony
    July 11th, 2017

    ARP is a layer 3 thing. Switches behave using Layer 2 protocols only so it does not send an ARP request for unknown MAC addresses. It just sends the frame out through all ports except for the port the frame came in on.

  7. samadi
    August 7th, 2017

    under normal operation, cisco recomends u configure switchpot on which on which vlan
    a: on any vlan accept default vlan
    b: on the management vlan
    c:on the native vlan
    D:on the default vlan

  8. Altaie
    August 11th, 2017

    Q10 as i remember, we should either :
    – set both sides to half duplex
    – set both sides to autonegotiate
    – set one side to autonegotiate and other side to half duplex
    so the answer is C,E,F

    can you double check this please ?

  9. Anonymous
    August 22nd, 2017

    Where are the questions? i see the answers only , please help me thanks

  10. kari
    August 31st, 2017
  11. vincent
    September 7th, 2017

    reginald cn u pls send me the dumps pls or any1 who has the valid dumps i realy wana get over these.. my certificates has expired pls help.. my email is {email not allowed}

  12. Anonymous
    September 29th, 2017

    Passed today,
    IT-libraries dumps are still valid.

    good luck !

  13. Dina
    October 31st, 2017

    hello Anonymous
    could you please advise the link of dump u have used ?

  14. Dina
    October 31st, 2017

    I need dumps for switch 300-115

  15. Anonymous
    November 7th, 2017

    congrulation friend if u have update switch dump i need

  16. Noah
    December 1st, 2017

    I’m Noah. If one side is negotiate and the other half duplex, it will be working fine but Cisco doesn’t recommend that because we want to make sure we maintain same match forever.

  17. kk
    January 5th, 2018

    Question 10.
    Which of the three options are switchbox configurations that can always avoid duplex mismatch errors between two switches? (Choose three)
    A. Set one side of the connection to the full duplex and the other side to half duplex
    B. Set both sides of the connection to full duplex
    C. Set one side of the connection to auto-negotiate and the other side to half duplex
    D. Set one side of the connection to auto-negotiate and the other side to full duplex
    E. Set both sides of the connection to auto-negotiate
    F. Set both sides of the connection to half duplex

  18. Jofan
    March 26th, 2018

    Question number 5
    Switch-1 needs to send data to a host with a MAC address of 00b0.d056.efa4. What will Switch-1 do with this data?
    A. Switch-1 will drop the data because it does not have an entry for that MAC address.
    B. Switch-1 will forward the data to its default gateway.
    C. Switch-1 will flood the data out all of its ports except the port from which the data originated. D. Switch-1 will send an ARP request out all its ports except the port from which the data originated.

    Why D is not the correct answer? can somebody explain to me?

  19. Charice :)
    March 26th, 2018

    Hi All, please send me valid dumps

  20. max
    March 27th, 2018

    please send me the latest dumps
    max.sarmd (at ) gmail (dot) com

  21. AB
    April 16th, 2018

    Question 3:
    D. In a property …

    Pls rectify wording from “property” to “properly” on Question 3 and also on the Quiz.

  22. AB
    April 16th, 2018

    Another correction:

    Question 2: Options B & D are exactly the same. Pls recitfy along with Question 3 discrepancy mentioned above.

    SwitchB(config)#ip default-gateway
    SwitchB(config)#interface vlan 1
    SwitchB(config-if)#ip address
    SwitchB(config-if)#no shutdown

    SwitchB(config)#ip default-network
    SwitchB(config)#interface vlan 1
    SwitchB(config-if)#ip address
    SwitchB(config-if)#no shutdown

  23. 9tut
    April 17th, 2018

    @AB: Thanks for your detection on the typo in Q.3, we have just fixed it.
    In Question 2 answers B & D are different with keyword “default-gateway” & “default-network”.

  24. AB
    April 17th, 2018

    Thanks for correcting Q.3 and clarifying Q.2.

    Amazing work !!!

  25. Nano
    April 28th, 2018

    For Q10:
    “… Both sides of a link should have auto-negotiation on, or both sides should have it off. ”

    You can find the complete explanation in: When to Use Ethernet 10/100 Mb Auto-Negotiation

  26. Ahmadul Kabir
    June 6th, 2018

    Where are the full questions on this pages. Only having the question numbers..

  27. BB
    June 11th, 2018

    @Ahmadul….I think you have to be a member to get these….It is well worth the $12.

  28. cthelite
    June 29th, 2018

    Configuration of which option is required on a Cisco switch for the Cisco IP phone to work?
    A. PortFast on the interface
    B. the interface as an access port to allow the voice VLAN ID
    C. a voice VLAN ID in interface and global configuration mode
    D. Cisco Discovery Protocol in global configuration mode

    Though B is obviously correct… CDP must also be enabled for IP phones. It doesn’t have to be in global configuration mode, it can be per interface, but important to know it is required… and I think most typically in global config.

  29. Donovan
    October 8th, 2018

    Can’t access this quiz, the link to this page leads me to a message that says, “This quiz cannot be shown on the current domain”.

    Anyone know whats going on?

  30. 9tut
    October 8th, 2018

    @Donovan: We are sorry for the problem. We have just fixed and it is working normally now!

  31. Remedy
    October 10th, 2018

    I have the same problem
    “This quiz cannot be shown on the current domain.”

  32. 9tut
    October 11th, 2018

    @Remedy: We made a mistake. Now it has been fixed and we opened it successfully.

  33. gg
    October 29th, 2018

    can you please explain @ number 11 the reason the collision domain would increase??

  34. zamil
    November 2nd, 2018

    Q 4

    Here we can see that this port is configured for full duplex, so the next step would be to check the duplex setting of the port on the other switch. A mismatched trunk encapsulation would not result in input errors and CRC errors.

  35. Bariz
    November 25th, 2018

    Hello Everyone
    hope you all have a great time
    i need 200 -125 valid dump please .
    shirshahbariz at hotmail dot com

    thanks in advance

  36. Anonymous
    January 27th, 2019

    It says question 1 without providing the question……where do you get the question from? Am I missing something?

  37. Anonymous
    February 15th, 2019

    you need to pay inorder to get the question is just $15

  38. Dan
    February 21st, 2019

    Would like a valid dump please.

    dboros at gmail dot com

  39. simed
    February 25th, 2019

    i cant find the questions of these answers someone help me plz

  40. Alaa
    March 16th, 2019

    Hi every one
    please send latest dumps for CCNP switch to (alaa.bin.gboos at gmail dot com) thank you

  41. Karnan
    September 24th, 2019

    Hi every one
    please send latest dumps for CCNP switch to (karnanmyl at gmail dot com) thank you

  42. Salam
    September 28th, 2019

    Number 11, if the answer is C, then it should delete the word domains.
    C. The number of collision would increase.

    if not, answer should A and D

  43. Sharma Arjun
    October 16th, 2019

    Hello all, where can I get the latest dumps for ccna?
    please help me at arjung(dot)nitrems(at)gmail(dot)com

  44. Gabi
    November 24th, 2019

    Q11- The answer should be B and D?
    B-The number of collision domains would decrease
    D-The number of broadcast domains would remain the same

  45. Alex B
    January 16th, 2020

    Q1 right answer C is also right.
    From Official Cert Guide:
    Step 1. Use the vlan vlan-id command in global configuration mode to create the data
    and voice VLANs if they do not already exist on the switch.
    Step 2. Configure the data VLAN like an access VLAN, as usual:
    A. Use the interface type number command in global configuration mode to
    move into interface configuration mode.
    B. Use the switchport access vlan id-number command in interface configu-
    ration mode to define the data VLAN.
    C. Use the switchport mode access command in interface configuration mode
    to make this port always operate in access mode (that is, to not trunk).
    Step 3. Use the switchport voice vlan id-number command in interface configuration
    mode to set the voice VLAN ID.

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