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VoIP Gateways

June 14th, 2010 in CVoice 642-436 Go to comments

Here you will find answers to CVoice – VoIP Gateway Questions

Question 1

Refer to the exhibit. Choose the correct configuration command set that will allow the gateway in zone BR to register with the gatekeeper in the same zone.

Gateway_register_gatekeeper.jpg

A.
interface fastethernet 0/0
ip address 10.1.110.1
h323-gateway voip interface
h323-gateway voip id BR ipaddr 10.2.120.1
h323-gateway voip h323-id BRgw
!
gateway
B.
interface fastethernet 0/0
ip address 10.2.120.1
h323-gateway voip interface
h323-gateway voip id BR ipaddr 10.1.120.2
h323-gateway voip h323-id BRgw
!
gateway
C.
interface fastethernet 0/0
ip address 10.2.120.1
h323-gateway voip interface
h323-gateway voip id BR ipaddr 10.2.120.1
h323-gateway voip h323-id BRgw
!
gateway
D.
interface fastethernet 0/0
ip address 10.1.110.1
h323-gateway voip interface
h323-gateway voip id BR ipaddr 10.1.110.1
h323-gateway voip h323-id BRgw
!
gateway
E.
interface fastethernet 0/0
ip address 10.2.120.1
h323-gateway voip interface
h323-gateway voip id HQ ipaddr 10.1.110.1
h323-gateway voip h323-id BRgw
!
gateway

Answer: C

Explanation

Notice that the router at zone Br is functioned as both gateway and gatekeeper and it uses the IP address of 10.2.120.1 as the “zone local BR”. Therefore if we want “the gateway in zone BR to register with the gatekeeper in the same zone” we must use 10.2.120.1 in the command:

h323-gateway voip id BR ipaddr 10.2.120.1

In which, BR is the zone name defined in the “zone local BR” command (of the gatekeeper) and the is the IP address of an interface of the gatekeeper and it should be 10.2.120.1-> B, D and E are not correct.

A can be correct but it is not as clear as answer C.

Notice that last command h323-gateway voip h323-id BRgw specifies the BRgw is the name of the gateway to communicate with the gatekeeper.

Question 2

Examine the example output.

hostname GW1
!
interface Ethernet 0/0
ip address 172.16.2.1 255.255.255.0
h323-gateway voip interface
h323-gateway voip id GK1-zone1.abc.com abc.com ipaddr 172.16.2.2
h323-gateway voip h323-id GW1
h323-gateway voip bind srcaddr 172.16.2.1
!
dial-peer voice 1 voip
destination-pattern 1212…….
session-target ras
!
dial-peer voice 2 pots
destination-pattern 2125551212
no register e164
!
end

Choose the command that will restore communication with gatekeeper functionality to this device.

A. h323-gateway voip h323-id GK1
B. gateway
C. h323-gateway voip bind srcaddr 172.16.2.2
D. h323-gateway voip GW1-zone2.abc.com abc.com ipaddr 172.16.2.1

Answer: B

Explanation

The gateway command enables the H.323 VoIP gateway to register with the gatekeeper. This is the first command you should enter when configuring a voice gateway.

Question 3

Which item correctly describes the relationships between the feature and the category it belongs?

1 Supports analog faxes and modems on a VoIP network
2 Performs call setup and teardown between VoIP networks and the PSTN
3 Interconnects segments of the same or different VoIP networks using different media types
4 Interconnects segments of the same or different VoIP network using different signaling types

A. Gateway – 1 and 2
CUBE – 3 and 4
B. Gateway – 1 and 3
CUBE – 2 and 4
C. Gateway – 2 and 3
CUBE – 1 and 4
D. Gateway – 2 and 4
CUBE – 1 and 3

Answer: A

Comments
  1. Oker
    June 22nd, 2010

    To Q1, required is that ‘ to allow gateway in zone BR to register with the gatekeeper in the same zone’, but in answer 1 ‘ip address 10.1.110.1′ is referred to the IP address in zone HQ. That’s is not correct, I think. The IP address here should be the IP address in zone BR, which you intend to use for communication with the gateway in the zone BR.

  2. voicetut
    June 23rd, 2010

    Zone HQ has an IP address of 10.1.100.1 but the IP address of answer A is 10.1.110.1. The gateway in zone BR will register with the gatekeeper through the command “h323-gateway voip id BR ipaddr 10.2.120.1″, in which 10.2.120.1 is the IP address of the gatekeeper (and it is the IP address of zone BR).

  3. Oker
    June 23rd, 2010

    I have no problem with “h323-gateway voip id BR ipaddr 10.2.120.1″, but “ip address 10.1.110.1″. This is the IP address of HQ. But what is required is “gateway in zone BR to register with the gatekeeper in the same zone”, so the IP address of HQ should not appear in this place, but the IP address of BR should appear in this command.

  4. voicetut
    June 24th, 2010

    The IP address of HQ is 10.1.100.1, not 10.1.110.1.

  5. Ric
    June 24th, 2010

    Hey to all out there :)

    First of all I want to thank you so much voicetut and all the people who make that thing work. Great Job!

    Now I have a question to question number 1. What is the correct answere now? A collegue is of the opinion, that the correct answere isn`t even listed…..

    He says, the correct answere must be:

    interface fastethernet 0/0
    ip address 10.2.120.1
    h323-gateway voip interface
    h323-gateway voip id BR ipaddr 10.2.120.1
    h323-gateway voip h323-id BR
    !
    Gateway

    Reason: IPs have to be the same and the IP from the GW/GK out of the branch zone

    Thx for your help!

  6. voicetut
    June 24th, 2010

    We can’t assign the same IP address for both interface & zone.

  7. Ric
    June 24th, 2010

    If we look at the choices, you`re right. But in the latest dump files, we also have the choice I mentioned in my upper post….

  8. Oker
    June 24th, 2010

    Yes, the answer in Ric’s post is exactly what I mean. The IP address in this command should be the IP address of the interface which communicates with the gatekeep.

  9. voicetut
    June 25th, 2010

    The IP address in the command “h323-gateway voip id BR ipaddr 10.2.120.1″ must be the IP address of the gatekeeper, not the interface which communicates with the gatekeeper.

  10. Oker
    June 25th, 2010

    I mean, the IP address in the second line here “ip address …..”, which is the IP address of interface fastethernet 0/0, should be 10.2.120.1, which is the IP address of the interface which communicates with the gatekeeper. This is also what is required by the question.

  11. voicetut
    June 25th, 2010

    The IP address 10.2.120.1 has been assigned to zone BR with the command “zone local BR 10.2.120.1″ hence we can’t assign it to the interface which communicates with the gatekeeper.

  12. Raul
    June 30th, 2010

    It is correct the appreciation of voicetut, in the “h323-gateway voip id” GW configuration command you put the Gatekeeper IP address, not he interface wich communicates with the GK.

  13. Azhar
    July 7th, 2010
  14. cvoice
    July 19th, 2010

    hi today i got 1000/1000 for my exam. For the Question 1 – the given ip address for the HQ was 10.1.110.1 not the ip mentioned above. So the correct answer is,

    interface fastethernet 0/0
    ip address 10.2.120.1
    h323-gateway voip interface
    h323-gateway voip id BR ipaddr 10.2.120.1
    h323-gateway voip h323-id BR
    !
    Gateway

    All other answers in this site is 100% correct. Thank you very much Voicetut.

  15. cvoice
    July 19th, 2010

    And also i want to know, do you have a site for the other ccvp exams?

  16. voicetut
    July 19th, 2010

    Now I haven’t had a site for other ccvp exams…

  17. RHP
    August 4th, 2010

    For Question 1, can you please confirm what’s correct answer, A is correct answer or answer with following commands:
    interface fastethernet 0/0
    ip address 10.2.120.1
    h323-gateway voip interface
    h323-gateway voip id BR ipaddr 10.2.120.1
    h323-gateway voip h323-id BR
    !
    Gateway

    Please let me know ASAP, I am taking exam tmw(8/5/10)

  18. RHP
    August 4th, 2010

    Doesn’t it IPaddress for Gatekeeper and gateway interface should be different? if that’s case, how answer with following IP address option is correct? Please explain.
    interface fastethernet 0/0
    ip address 10.2.120.1
    h323-gateway voip interface
    h323-gateway voip id BR ipaddr 10.2.120.1
    h323-gateway voip h323-id BR
    !
    Gateway

  19. Qasim
    August 4th, 2010

    To bind the gateway with the gatekeeper in the same zone the key command you should be looking to is
    H323-Gateway voip id BR ipaddr 10.2.120.1
    the choice have this option is the correct one, then you need to look to the IP address of the interface it shouldnt be the same IP of gatekeeper interface and shouldnt be from the remote zone range. other than that is acceptable, so i believe the choice in question one is A as answered.

  20. tamer
    August 10th, 2010

    question 1 here is different than the exam, it’s the same as the test inside 77 q and the answer should be “C”

  21. pbr
    August 11th, 2010

    see the diagram, and see the number of gateway interfaces, it have only one fastethernet..here is the answer.

  22. voicetut
    August 20th, 2010

    I reviewed question 1 today and realized that the third line of question C was mistyped. It should be “h323-gateway voip id BR ipaddr 10.2.120.1″ instead of “h323-gateway voip id BR ipaddr 10.1.110.1″. Therefore it is the correct answer. I updated this page.

  23. Zahran
    August 24th, 2010

    Guys,

    Finally which 1 is correct answer for Question 1?

  24. Coban
    September 13th, 2010

    Hi Fellows, question 1 answer is C correct,

    if you look at the question carefully, in zone BR GW and GK is the same router, that is why we will have the same ip addresses on those lines below.
    h323-gateway voip interface
    h323-gateway voip id BR ipaddr 10.1.120.2

  25. voiceman
    September 19th, 2010

    anybody given cvoice recently..
    pls share the new Q/A

  26. krabu
    September 21st, 2010

    Please correct the answer of question 1 – it should be A – on a GW ip addr of an interface can not be the same as ip addr pointing GK:
    ip address 10.2.120.1
    h323-gateway voip id BR ipaddr 10.2.120.1

    In my opinion Question 1 = answer A

  27. tonio
    September 21st, 2010

    hi, pls can you confirm the right answer to Q1 ? is it A or C ??

  28. krabu
    September 22nd, 2010

    My mistake – the GW and GK is the same device so the same ip addresses is OK.
    So answer C :) SORRY

  29. Eslam
    November 11th, 2010

    I have passed yesterday with 1000/1000
    and all qs are from here really thank you voicetut
    but the q no 1 have
    zone local HQ 10.1.110.1 not 10.1.100.1 in the configuration so there is no doubt that C is right
    please voicetut update the question.

  30. R1
    December 30th, 2010

    Hi Guys, I am confused on Q1. As per quote from Voicetut we can not assign local zone ip address to interface (Quote date June 25th 2010. – “The IP address 10.2.120.1 has been assigned to zone BR with the command “zone local BR 10.2.120.1″ hence we can’t assign it to the interface which communicates with the gatekeeper.”) But in answer C interface ip address and local zone ip address are same.

    interface fastethernet 0/0
    ip address 10.2.120.1
    h323-gateway voip interface
    h323-gateway voip id BR ipaddr 10.2.120.1
    h323-gateway voip h323-id BRgw

    Please someone clarify on it.

  31. JupDosenbier
    February 24th, 2011

    Q1
    Sure it is C not A. Just completed 2 Simulators both gave A as an answer.

  32. Janess
    May 3rd, 2011

    Hey, good to find somoene who agrees with me. GMTA.

  33. danghai
    December 26th, 2011

    anyone have full ebook ccnp voice?Can u share for me. :) .Thank in advance.
    My email:danghai174@gmail.com
    love voicetut!

  34. Swati
    February 24th, 2012

    Hello…! voicetut,

    c.
    interface fastethernet 0/0
    ip address 10.2.120.1
    h323-gateway voip interface
    h323-gateway voip id BR ipaddr 10.2.120.1
    h323-gateway voip h323-id BRgw
    !
    gateway
    ———————————————-
    Comment:
    voicetut
    August 20th, 2010
    1. I reviewed question 1 today and realized that the third line of question C was mistyped. It should be
    2. “h323-gateway voip id BR ipaddr 10.2.120.1″ instead of “h323-gateway voip id BR ipaddr 10.1.110.1″.
    3. Therefore it is the correct answer. I updated this page.
    ——————————-
    But till saw old answer. Pl… can you update this answer.

    Thank you

  35. Aditya
    March 20th, 2012

    Hi There,

    Can we have some more questions on VoIP gateways…??

    Thank you in advance!

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