Saturday, October 20, 2012

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


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


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


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


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


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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Tuesday, October 16, 2012

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.

Friday, October 12, 2012

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):



"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."

Tuesday, October 9, 2012

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.



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.


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.



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.


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.



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.


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.


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.


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.


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.


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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Thursday, October 4, 2012

Microsoft unified communications Lync system moves closer to proverbial PBX replacement option

New Microsoft Lync features, services mean the unified communications platform will draw more customers; parity with Cisco, Avaya targeted

Microsoft is talking about its upgraded Lync unified communications platform, revealing client support for more devices, server features for better meetings and collaboration as well as integration with the peer-to-peer voice and video service Skype.

While it is clearly a good UC choice for customers with needs that align with Lync's strengths, it's not yet a platform that can jump in readily to replace traditional PBXs in environments heavily reliant on traditional desktop phones, experts say.


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USE CASE: Microsoft delivers missing Lync for telemed project

Still, Lync is getting closer and its new features are bringing it into closer parity with UC leaders such as Cisco and Avaya, they say.

In touting upgrades to Lync 2013 - no release date has been set - Microsoft highlights its adoption of H.264 scalable video coding (SVC), a video codec standard that makes it relatively simple to display video on a range of devices, meaning Lync can support participants on screens ranging from smartphones to room displays, says BJ Haberkorn, director of product marketing, Microsoft Lync.

In addition, video displays by Lync clients has been upgraded to show up to five participants on screen at the same time, an improvement from having just the active talker on displayed. The view of those five is optimized depending on the number of participants and what other conference tools are being used.

Lync 2013 adds voice and video over IP for all devices, meaning that a device connected to a Wi-Fi network can participate in audio and video calls despite being disconnected from a traditional phone link. So users equipped with smartphones and tablets can conference over IP networks.

This is especially important to iPad users, he says, because the devices don't support cellular phone networks. So they can join conferences, register presence and instant message other Lync participants.

The latest Lync client supports Windows 8 with a reworked interface that embraces touchscreens, which he refers to as the Windows 8 paradigm.

Peer-to-peer voice and video service Skype is federated with the upcoming Lync server. That means a corporate user working off a Lync enterprise network could provide and receive presence information with users of Skype. They could also establish audio calls with Skype users, but not video calls. Microsoft has that ranked as the next feature it will work on after the initial release of Lync 2013, Haberkorn says.

Last summer, Microsoft added Lync to Phone, a service that lets Lync users complete calls to and receive calls from the public phone network using the Lync Online Client. Such services are available only in the U.S. and U.K. through third-party public phone network providers.

Microsoft is pushing Lync to the application developers to include UC tie-ins to the applications they write. An app could include links to information about parties listed in the user's address book and enable connecting with them directly from the application.

Microsoft has already done this with many of its productivity applications in Office where communications can be tapped via what is known as a rich content card that lists contacts' name, email, phone, instant messaging and presence information. That can include information about others sharing documents via SharePoint in the SkyDrive cloud.

For example, OneNote is better integrated within Lync meetings for taking notes, and within Outlook it is simpler to send invitations to meetings.

When Lync is upgraded, it will have clients for PC desktops including Windows 8, Macs, iOS, Windows Phone and Android. That will support tablets - used mainly within organizations - as well as smartphones.

Lync's look will be streamlined, cutting out the chrome that is now regarded as visual clutter, and making the overall look in step with what has been done to Office applications.

All this adds up to an improved Lync, but one that still isn't for everybody, says Phil Edholm, president and principal at PKE Consulting.

The reason is that not all businesses have uniform communications needs. He divides workers into three groups: knowledge, information and services, Edholm says.

The knowledge workers, such as engineers or financial analysts, are the ones that need the wide array of features UC can provide such as conferencing, collaboration, instant messaging and presence to get their jobs done. They don't rely on strict business processes as much as the other two categories of workers, but they need to communicate a lot with each other.




They also need to communicate with information workers who do rely on business processes and who need sometimes to communicate with knowledge workers. An example: a contact center worker who uses set business processes to finalize sales but who occasionally needs to talk to a subject matter expert - a knowledge worker - to supply information to a customer before a sale can be closed, Edholm says.

Service workers, such as delivery truck drivers, use information to direct their tasks, but don't need a UC infrastructure to do so.

"Lync is a toolset, and you need to decide who needs the tools," Edholm says, and sometimes that means deploying it to a select group

For instance, a Scandinavian police organization client of Edholm's had 30,000 workers only 3,000 of whom were knowledge workers. Those 3,000 needed unified communications, but most of the rest didn't, leading the organization to install Lync for some but not all.

In a company with 90% knowledge workers and 10% information workers the situation would be different. It would make sense to install UC for everybody just to avoid multiple systems and their maintenance needs despite the fact that some of the workers would use just the phone capabilities.

In a typical mixed deployment such as the police organization, the legacy telephony system could tie into Lync. Those with just desktop phones could reach those with Lync and vice versa, but the desk phone users wouldn't require new gear nor would they have to learn new ways of doing things, he says.

Lync becomes a challenge when it is deployed to people who only use its telephony features. "Lync is not structured to be a telephony-only system," he says. "You can do it but it doesn't lend itself to being easy to use and easy to install if it's just telephony."

That's because while it may perform all the necessary functions, there may be different ways of carrying them out, which requires training.

For example, multiple line appearances where a phone can ring on an individual's desk but also at the receptionist's desk would be replaced functionally by presence, a different way of doing the same thing.

"The biggest resistance comes with going from traditional telephony to Lync," Edholm says. "This is changing somewhat and will change even more with [the bring-your-own-device trend]," he says.

Edholm says he did a comparison of Lync vs. Cisco's UC for collaboration, and he found that an important factor is what the UC system has to interface with.

If the organization considering UC has a Microsoft directory system, Microsoft business applications and Microsoft databases, as well as Microsoft personal productivity tools such as Office, it makes sense to use Lync. It was built with Office, SharePoint and Active Directory interoperability in mind, he says.

If an organization doesn't use Microsoft email, calendaring and productivity apps, then adopting UC from Avaya, Cisco, Nortel or Siemens might make more sense, especially if the existing PBX is made by one of these vendors, he says. "It's not the UC system alone, it's the kind of workers you have and the other systems you use," he says.

Lync itself seems to be moving away from controlling the traditional desktop phone in favor of a UC system that includes telephony run from a desktop PC and a server in the data center or the cloud, which has service providers showing interest in the platform.

BT, for example, is offering a new Lync-based cloud service called BT One Cloud Lync that provides Lync as a service with the infrastructure based in the BT network.

Similarly, West IP Communications offers a Lync service that supports Lync edge, mediation and federation servers in West IP data centers. The upside for customers, says Jeff Wellemeyer, executive vice president of West IP, is quality of service. If these components are located on customer premises for a widely distributed Lync deployment, it makes it more difficult to ensure quality of service to all branches.

Hosted Lync isn't for all customers, though, particularly those whose media traffic is intended to stay within the LAN, minimizing WAN QoS as an issue, he says.

Wellemeyer says that customers tend to progress in their use of Lync features, perhaps starting with just instant messaging, adding presence, conferencing, collaboration and connecting to the public phone network with some softphone use.

Moving to Lync as a PBX replacement is considered a move for "someday," he says. "We're not seeing a lot of customers tearing out their PBXs and putting in a Microsoft infrastructure."

They might use Lync supplemented by PBX technology. "They think Lync's not there yet," he says.

Wednesday, October 3, 2012

Rumor: Microsoft's building its own Windows 8 smartphone

Called Microsoft Surface, it's due out next year, stories say

In a move that would help it compete against the iPhone, Microsoft is rumored to be making its own smartphone that will run on Windows Phone 8, which would again put the company in competition with its hardware partners.

The rumor first popped from the China Times followed closely by a similar story in Boy Genius Report.

HELP: 11 (FREE!) Microsoft tools to make life easier

The China Times story, translated into rough English, seems to say Microsoft has contracted smartphone developers and assemblers in China to build a Microsoft-branded Windows Phone 8 phone for sale sometime next year.

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Boy Genius Report quotes two unnamed sources saying Microsoft plans to release the Surface smartphone in the coming months to compete against iPhone 5, Samsung Galaxy S III and other high-end phones.

Surface is the name of Microsoft's tablet/laptop that is scheduled to launch Oct. 26 along with the Windows 8 operating system.

A second BGR source says the timing of the smartphone release is up in the air, but will likely be after this year's holiday shopping season.

If true, the rumors will mean two things: Microsoft is further risking the ire of its hardware partners by competing against them, and it is adopting the same model that Apple has used in making and selling iPads and iPhones by controlling both the hardware and software associated with the devices.

The company already caused a flap with its plans to sell Surface tablets and laptops. Acer and Lenovo responded that Microsoft ought to think twice about competing against established tablet makers and Lenovo said Surface would have a negative effect on the PC market.

Nokia, Samsung and HTC have all agreed to produce Windows Phone 8 devices in the coming months.

While licensing its software to partners who sell it on their own hardware has been Microsoft's PC model for years, things are different with tablets and phones. Whereas Microsoft dominates PCs, that is not the case with tablets and smartphones, where Apple throws its weight around with iPhones and iPads.

Apple's model is to control the software, hardware and applications, which is where Microsoft seems to be going with Surface tablet/laptops and where it would be with smartphone if the rumors are true.