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D. RAS messages will be load balanced between 192.168.0.2 and 172.16.0.2
You are a network technician working in the Network Company. Recently, users complain that they cannot call the PSTN. With the help of testing, you find that the gateway is not switching to the secondary call agent when the primary call agent is unreachable. In order to permit the MGCP gateway to take use of a different call agent once the primary fails, which configuration should you make?
Add ccm-manager fallback-mgcp command to the gateway.
Add ccm-manager redundant-host command to the gateway
Assign a Cisco Unified CallManager group including the secondary call agent to the gateway
Define gateway as a non-gatekeeper-controlled intercluster trunk with the secondary Cisco Unified CallManager defined.
Which RAS message does a gateway use to request admission to a network and to also request phone number to IP address resolution?
Admission messages between endpoints (like a gateway) and gatekeepers provide the basis for call admissions and bandwidth control. Gatekeepers authorize access to H.323 networks with the confirmation of or rejection of an admission request. This table defines the RAS admission messages
As a network technician, you should be familiar with RTCP. Which of the following statements best describes a function of RTCP?
RTCP provides encryption, message authentication and integrity, and anti-replay service for voice streams.
RTCP uses even-numbered UDP ports in the range 16,384??0?10?0?43??ì?0?1C32,767 to transport voice payloads
RTCP provides out-of-band control information for an RTP flow
RTCP caches an RTP packet-Layer 3 and Layer 4 headers in the routers at each end of a link, resulting in lower bandwidth demand for subsequent RTP packets.
You are a voice technician. If you are required to solve latency issues in a VoIP network, which measures will you take? (Select three.)
Use dejitter buffers
Prioritize voice packets
Fragment data packets
Answer: B, C, D
Please choose two methods of LRQ forwarding from the following items. (Select two.)
Answer: B, D
Look at the following exhibit carefully. You are a network technician working in a middle-sized company. Some users complain that the call is always dropped as soon as it connects when they dial from BR1 to HQ through the IP WAN. Please choose the most possible reason of this issue from the following statements.
H.245 capabilities exchange has failed due to insufficient bandwidth.
A codec mismatch has occurred and transcoders or additional transcoding resources need to be configured at HQ.
Packet loss has kept H.225 setup messages from completing the call.
MTP resources need to be configured on the BR1 gateway.
You are a network technician with many years' experience. Many users complain that they can hear echo when their calls go out an H.323 gateway. You have made some testing for the gateway and have changed the configuration. So the ERL level turns to be 6 dB. Furthermore, the echo-cancel coverage value is raised to 64 ms. Please choose the effect on the voice quality after this modification.
Consonants will be chopped by the echo canceller.
The increase in echo-cancel coverage will have no effect on voice quality.
The ends of sentences will be chopped by the echo canceller.
The echo canceller will take 2-3 seconds longer to converge at the beginning of the call.
echo-cancel coveragecommand Adjusts the coverage size of the echo canceller. This command enables cancellation of voice that is sent out through the interface and received back on the same interface within the configured amount of time. If thelocal loop(the distance from the interface to the connected equipment that is producing the echo) is longer, the configured value of this command should be extended. If you configure a longer value for this command, it takes the echo canceller longer to converge. In this case, the user might hear a slight echo when the connection is initially set up. If the configured value for this command is too short, the user might hear some echo for the duration of the call because the echo canceller is not canceling the longer- delay echoes. There is no echo or echo cancellation on the network side (for example, the non-POTS side of the connection).
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Cisco Certification Exams
The main requirement for obtaining Cisco Career Certifications such as CCENT, CCNA Routing and Switching, CCDP and CCIE and Cisco Specialist Certifications such as Cisco Firewall Security Specialist is to take and pass one or more certification exams and sign the Cisco Certifications and Confidentiality Agreement. Passing exams give network professionals the chance to prove their networking knowledge and expertise.
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Exams can be very challenging, going beyond simple recall and requiring candidates to engage in on the job types of problem solving. Questions include multiple-choice single answer, multiple-choice multiple answers, drag and drop, fill in the blank and simulations. An Exam Tutorial is available to demonstrate the various question formats.
Exams other than CCIE lab exams are delivered online, with questions in sequence, and do not allow a candidate to "mark" and return to an exam question.
Candidates will be provided with an erasable note board and marker for notes and calculations to assist them as they answer the questions.
Exams may contain non-scored items to collect performance data on new items. Non-scored items are not used in determining the passing score nor are reported in a subsection of the score report. All non-scored items are randomly placed in the exam with sufficient time calculated and given to complete the entire exam.
At the completion of computer-based exams, candidates receive a score report along with a score breakout by exam section and the passing score for the given exam. Lab exams are Pass/Fail and results are available online (using login) within 48 hours.
Cisco does not publish exam passing scores because exam questions and passing scores are subject to change without notice.
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Prices vary by level and by currency. Find cost information here by choosing your country and exam.
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For CCIE Lab Exams, visit the CCIE website for more information.
For all other exams, contact an authorized test delivery partner in your area to register for an exam.
In the U.S. and Canada, exams usually can be scheduled up to six weeks in advance, and as late as the same day. Scheduling policies vary at international locations.
Candidates who fail an exam must wait a period of five (5) calendar days, beginning the day after the failed attempt, before they may retest for the same exam.
Passing the Exam
After a candidate passes all exams required for a certification and signs the required agreements, Cisco will send a Cisco Certifications certificate identifying the candidate's Cisco Certification ID and valid certification dates. Allow 3-5 business days for electronic certificates and 6-8 weeks from the date the certificate was mailed for printed certificates.
Certified candidates are authorized to use the appropriate Cisco Certifications logos indicating certification status. Prior to use, they must read and acknowledge the Cisco Certifications Logo Agreement. Logos can be ordered through the Cisco Certifications Tracking System.
The Cisco Certifications Tracking System provides a record of both exam and certification status. Candidates and certification holders are expected to keep contact information up to date for receiving notifications from Cisco.
Do certification exams expire?
Exams required for CCENT, Associate, and Professional certifications are valid for three years from the date the exam was passed. Exams for the Specialist certifications are valid for two years from the date the exam was passed.
Placing expiration dates on exams ensures that candidates starting a multi-exam certification such as CCENT, CCNA Routing and Switching, or CCDP, for example, complete the program within a specified time frame. By passing all of the required exams within the specified time period as noted above, candidates demonstrate that they are tested on current content. In situations where the period exceeds three years, candidates will need to retake those exams that expire.
For CCIE written exam expiration information, visit the CCIE Exam Information page.
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