642-425 Q&A / Study Tools / Testing Engine

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QUESTION 1
Use the diagram to assist in answering this question.
You have received a trouble ticket for a recently installed MGCP gateway. In testing it appears that
the CallManager cluster cannot communicate with the gateway. The gateway address is
10.1.44.12/24 and the CallManager that is going to control the gateway has an address of
10.1.44.4/24. Use the following configuration snip to resolve the problem.
!
mgcp
mgcp call-agent 10.1.44.4 2427 service-type mgcp version 1.0
mgcp dtmf-relay voip codec all mode out-of-band
mgcp rtp unreachable timeout 1000 action notify
mgcp modem passthroughvoice mode cisco
mgcp sdp simple mgcp package-capability rtp-package
mgcp package-capability sst-package no mgcp timer receive-rtcp
no mgcp explicit hookstate
!
ccm-manager config server 10.1.44.7
ccm-manager config
!
What command is missing from the configuration that will allow the CallManager to control this
gateway?


A. ccm-manager fallback-mgcp
B. ccm-manager switchback
C. mgcp bind control source-interface FastEthernet 0/0
D. ccm-manager mgcp
E. ccm-manager redundant-host

Answer: D

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QUESTION 2
What happens if CDP is not enabled on a switch port where an IP phone is connected?

A. The phone is unable to acquire an IP address.
B. The switch will put the port into theerrDisable state until CDP is enabled.
C. The phone cannot get its VLAN ID assignments.
D. The switch cannot include the voice VLAN in the uplink trunk.
E. The phone cannot learn the address of the TFTP server.

Answer: C

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QUESTION 3
An 802.1Q trunk is configured with mismatched native VLANs. What is the most likely symptom?

A. Layer 2CoS markings are not mapping correctly to layer 3 QoS markings.
B. Spanning Tree Protocol is disabled for all VLANs in the trunk.
C. Communication over the link occurs in one direction only.
D. The switch port is shut down and displays a port status oferrDisable.

Answer: D

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QUESTION 4
Which tool lists the following options in a query:
All Patterns
Unassigned DN
Call Park
Conference
Directory Number
Translation Pattern
Call Pickup Group
Route Pattern
Message Waiting
Voice Mail
Attendant Console

A. SQL Enterprise Manager > CCM 03xx > Device Pool > Return All Rows
B. Route Plan > External Route Plan Wizard
C. Digit Number Analyzer
D. Route Plan > Route Plan Report

Answer: D

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QUESTION 5
When dialing 1136, which of the following patterns will be selected?

A. 11XX!
B. 1[1-4]XX
C. 1[14]XX
D. 1[^2-8]XX

Answer: A

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QUESTION 6
IP Phone A can make calls to some but not all phones. Phone A cannot call Phone B. The
following is the extended ping output from the router interface on the CallManager subnet to the
Phone B subnet.
ping 172.16.1.45
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.45, timeout is 2 seconds:.!.!.
Success rate is 40 percent (2/5)
What does this output indicate?


A. CallManager has a good IP path to Phone B
B. Multiple equal cost paths exist fromCallManager to Phone B, and one is currently unusable.
C. The IP phone is turned off, but the switch port it connects to is accessible via IP.
D. The IP path fromCallManager to Phone B has a 20% packet loss problem.

Answer: A

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Raspberry Pi now packs 512MB RAM

The educational and hobbyist gizmo du jour adds extra memory, but doesn't hike the price

The Raspberry Pi model B -- a cheap, customizable Linux computer the size of a pack of cigarettes -- now boasts 512MB of RAM, for the same price as before, according to the Raspberry Pi Foundation.

MORE RASPBERRY PI: Google's Android 4.0 being ported to $25 Raspberry Pi PC

The model B, which costs $35 plus shipping, used to have 256MB of RAM, but founder and trustee Eben Upton said in an official blog post that the foundation was consistently receiving requests for more.

"One of the most common suggestions we've heard since launch is that we should produce a more expensive 'Model C' version of Raspberry Pi with extra RAM. This would be useful for people who want to use the Pi as a general-purpose computer, with multiple large applications running concurrently, and would enable some interesting embedded use cases (particularly using Java) which are slightly too heavyweight to fit comfortably in 256MB," he wrote.

However, given that the foundation was unwilling to go above its $35 price point, Upton said, the decision was made to simply double the device's RAM without charging the consumer. Users with an outstanding order for a 256MB model should receive a 512MB model instead, he noted, and the foundation has released a firmware upgrade to allow access to the additional memory.

Given the Raspberry Pi Foundation's mission to promote hobbyist programming and increase educational opportunities for budding programmers, it's not necessarily a surprise to see the price remain the same despite the extra capacity. If the gadget was a commercial venture, a more-expensive "C" model -- as outlined by Upton -- would be the more likely outcome.

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CompTIA Lifetime Certification Change Creates Controversy

CompTIA faces backlash from technology certification holders after informing those with supposedly lifetime A+, Network+ and Security+ certifications that they would have to retroactively pay for renewals. CompTIA has since retracted the changes for anyone who receives one of those certifications in 2010, but come 2011 the renewal process will be in place.

In December, the Computing Technology Industry Association decided lifetime A+, Network+ and Security+ certifications were going to retroactively require renewal every three years. The response from the IT community was particularly thorny, and rightfully so. Why the changes? According to Ars Technica, CompTIA was getting its accreditation process evaluated by several larger accreditation organizations, including ISO (International Organization for Standardization) and ANSI (American National Standards Institute), which were helping evolve requirements.

It's not uncommon for many certifications to require renewal, but you certainly affect a lot of people when you ask them to pay to continue something they were told would last as long as they did. Lifetime is lifetime, people said. Many comments about CompTIA were negative, though the organization has taken down its original post that received a harsh response. Here's one reaction (from Phillyman's Blog):

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"According to Wikipedia, over 800,000 people are A+ certified! So you just expect 800,000 people to hand over $220 every 3 years??? Before you pulled this little stunt of yours, I had planned on getting the following certifications... Network+ ($220), Linux+ ($220), Security+ ($240). Do you know how many CompTIA certifications I plan on getting now? ZERO!!!!!"

CompTIA appears to have been listening to the uproar and has changed its tune for certifications earned in 2010 or earlier, but after this year, these lifetime certifications will need to be renewed every three years. Here are the latest details from Ars Technica, which led the reporting on the controversy:

"Holders [from 2011 and beyond] who wish to maintain their certification will then have to pay an annual fee to CompTIA of $25 or $49 and will need to rack up sufficient continuing education credits to renew their certs.

The initial decision to retroactively invalidate certifications generated considerable anger among cert holders, which we described in today's story on the fiasco. An hour after our original report went live, CompTIA contacted us with news about the change.

CompTIA president Todd Thibodeaux, announcing the policy change, said, "We do not wish to disenfranchise any of the individuals who have supported our certification program. The right thing to do is honor our past commitment to those certified under our original 'certified for life' policy."

Top 10 cloud jobs

Dice.com, the popular tech-focused job site, posts upwards of 3,800 cloud-related job listings on any given day. Researchers there crunched the numbers to come up with a list of the top 10 most available jobs in the cloud. These job descriptions and credentials were compiled using multiple job listings in each category.

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Cloud architect
Job description: Spearhead the development and implementation of cloud-based initiatives to ensure that systems are scalable, reliable, secure, supportable, and achieve business and IT performance and budgetary objectives.

Required credentials: B.S. in computer science or engineering; 10+ years experience in large-scale, multi-platform networks; expert in Shell, VBScript, Perl or Python; expert knowledge of Linux and Windows; significant experience designing, installing and administrating virtualized environments.

Requested credentials: Experience working with public cloud providers; expert understanding of firewall and load balancing concepts; prior work creating PCI-compliant solutions.

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Cloud software engineer
Job description: Responsible for design and development of distributed software modules that integrate with cloud service providers.

Required credentials: B.S. in computer science or engineering; 2+ years professional experience in software development; work experience with ETL (Extract-Transform-Load) tools and techniques; work experience with system configuration and deployment automation technologies; hands-on programming experience on a Linux/Unix operating system; excellent understanding of at least one compiled-code language.

Requested credentials: Experience in deploying software to cloud computing infrastructure; experience in SOA technologies; ability to provide accurate ETA for software modules.

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Cloud sales: cloud sales executive, cloud sales representative, cloud sales consultant, cloud sales manager

Job description: Develop and grow a book of outsourced cloud business with C-level professionals in midsize and enterprise-level customers.

Required credentials: Bachelor's degree in business administration and 5-10 years business experience in client-facing roles, with some of that spent in outsourcing or systems integration; highly effective communication skills; strong understanding and successful experience in building strategic and/or developmental partnerships at the C-level within midsize and large corporations; demonstrated consistent quota attainment in selling infrastructure, IT, cloud and security services.

Requested credentials: Ability to travel more than 50% of the time on the job.

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Cloud engineer

Job description: Plan and conduct technical tasks associated with the implementation and maintenance of internal enterprise-shared virtualization infrastructure.

Required credentials: B.S. in computer science; 5+ years of implementation experience with highly virtualized shared infrastructure, platforms or applications architecture at a large enterprise or service provider.

Requested credentials: Vendor-specific virtualization certification such as VMware Certified Professional.

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Cloud services developer

Job description: Design and build the multi-platform customer-facing tools -- such as sales interfaces and management portals -- that serve as the gateway into how end users consume the underlying cloud services.

Required credentials: B.S. in computer science or computer engineering; 5 years of experience with cloud architecture and design; 5 years of experience architecting and deploying Web services on SOA platforms (examples: Amazon EC2, Heroku, Azure, Rackspace); 5 years of experience with PHP Python, Java, or C++ with software development methodologies like Agile.

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Cloud systems administrator

Job description: Configure and maintain the systems that comprise the underlying cloud platform. Troubleshoot when problems arise and plan for future cloud capacity requirements.

Required credentials: B.S. in computer science or computer engineering; 3 years of experience in operating system administration; 3 years of experience in supporting enterprise-level platform installations; strong Linux command-line skills; experience in performance monitoring and capacity planning for enterprise platforms.

Requested credentials: Knowledge of cloud-based development.

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Cloud consultant

Job description: Conduct technical studies and evaluations of business area requirements and recommends to IT management appropriate cloud technology options.

Required credentials: At least 8 years of related IT consulting experience; outstanding understanding of cloud technologies available and vendors providing cloud services; top-notch communication skills.

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Cloud systems engineer

Job description: Build the virtual systems that support the cloud implementation.

Required credentials: B.S. in computer science, information technology or related technical degree; 5-10 years of systems engineering experience, holistic understanding of the Internet and hosting from the network layer up through the application layer; experience in a 24x7 hosting environment.

Requested credentials: Experience with monitoring tools, scripting, configuration management, clustering, Drupal and Internet security.

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Cloud network engineer

Job description: Perform the implementation, operational support, maintenance and optimization of network hardware, software and communication links of the cloud infrastructure.

Required credentials: Related degree in computer science ; 4 years' in-depth network engineering experience; proven deep understanding of TCP/IP, Subnetting, DNS, DHCP, NAT and routing; strong knowledge of Layer 2 network protocols; strong knowledge of Layer 3 IP routing; proven scripting abilities in one or more language -- Perl, Shell or Python.

Requested credentials: Cisco Certified Network Associate (CCNA)/Cisco Certified Network Professional (CCNP) certification.

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Cloud product manager

Job description: Perform product planning for cloud-based offerings including creating product concept and strategy documents, creating requirements specifications, identifying product positioning and enabling the sales processes (licensing, pricing, packaging, benefits, etc.).

Required credentials: Bachelor's degree in business or computer sciences or equivalent work experience; minimum of 3 years of experience working with a software development company that deploys its offerings using a SaaS or cloud-based model; very strong communication skills.

Requested credentials: Advanced degree in business or computer sciences.

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