Saturday, October 10, 2015

010-151 Supporting Cisco Datacenter Networking Devices (DCTECH)


QUESTION 1
Which method is a TCP/IP-based protocol for establishing and managing connections between IPbased
storage devices, hosts, and clients?

A. FCIP
B. iFCP
C. iSCSI
D. FCoE

Answer: C

Explanation:


QUESTION 2
Which method does FCIP use to enable connectivity of geographically distributed Fibre Channel
SANs over IP?

A. routing
B. tunneling
C. handshaking
D. transporting

Answer: B

Explanation:


QUESTION 3
Which important feature on the front end is provided to the clients by multiple servers that access
the same storage devices across the SAN?

A. recovery
B. redundancy
C. resiliency
D. security
E. storage

Answer: B

Explanation:


QUESTION 4
The Ethernet specification details several different fiber optic media types. What is the wire
transmission speed for 100BASE-FX Ethernet?

A. 10 Mb/s
B. 100 Mb/s
C. 1000 Mb/s
D. 10000 Mb/s

Answer: B

Explanation:


QUESTION 5
Which fiber optic cable type is used most often with a Subscriber connector?

A. dual-mode
B. single-mode
C. straight-mode
D. multi-mode
E. subscriber-mode

Answer: B

Explanation:


Tuesday, September 8, 2015

The sharks of the Internet

That’s what hackers are — they should be feared, but our fears are completely out of proportion

My company’s CEO called me in a panic the other day.

“I think my iPhone may have been hacked,” he said, as I squinted myopically at the clock trying to see what time it was. 7:15 a.m. — time to get up anyway, I thought.

“What makes you think it’s been hacked?” I asked, trying to get my bearings. What day was today? I thought I had a meeting later that morning, but this was no time to get distracted, so I focused my attention on the CEO’s voice.

“It’s been getting really slow over the last week or two,” he said, “and sometimes it just freezes up.”

Well, that’s a sure sign of a hacker, I thought: a slow mobile device. I guess there must be armies of hackers all around us. I asked if there was any other strange behavior.

“No, but it worked fine before a couple weeks ago” he replied.
By now, I was fully awake and realizing I needed to get off this call and get to work. “Call the IT guy,” I said, “and have him troubleshoot the problem.” I told him I didn’t think it was a hack attack, just another glitch in the software. I hate to make assumptions, but this didn’t sound like the symptoms of a compromise. There are many possible causes for slowdowns and freezes, and at least on iPhones, hackers do not top the list — especially since I have many layers of security in place, including mobile device management (MDM), which gives me control over the device’s security settings, and application reputation monitoring, which alerts me if someone installs a dangerous app.

I found out later that the cause of the problem was an unreliable operating system release that had been installed on the CEO’s phone. That particular version had a known bug that caused it to run out of resources over time, slowing to a crawl and eventually freezing. My CEO was relieved that we weren’t under attack. I was left feeling puzzled and a little bit annoyed. I mean, it's hard enough to educate people at my office about real-world security threats and make them aware enough to avoid clicking dangerous links and attachments. Misconceptions and misplaced fears of Hollywood-style uber-hackers just get in the way and distract people like my CEO from what they should really be paying attention to.

Why in the world would anyone jump to the conclusion that unusual software behavior was being caused by hackers? How often do any of us actually get hacked? And when we do, is it that noticeable?

I think the answer is in fact no. Look at all the security breaches of the last 18 months — Target, Home Depot, Michaels and Chase, for example. How many of them were detected in progress? None. The victims were completely unaware they were being hacked, and the reason is that the hackers were subtle. I would think the victims would have been alerted if their computers started freezing up. When you're hacked, you don't see it while it's happening.

In fact, today’s hackers are very sophisticated. They exploit zero-day Adobe Flash vulnerabilities to invisibly install malware through malicious advertisements on websites, or poison Web searches to lure victims into malicious search results. The least sophisticated hackers still send old-fashioned email phishing scams, but even those install malware silently, without disruption.

I’ve also had several friends make the hacker assumption over the last several months. Anything strange or unusual seems to be caused by a malicious actor, in today’s common wisdom. I can’t help but scoff when I hear stories of phantom mouse movements (inevitably caused by rundown batteries in wireless mice), or phantom keystrokes (invariably the result of rundown batteries in wireless keyboards). Or even the dreaded (Microsoft Windows) Blue Screen of Death, which is always caused by instability in the operating system and its device drivers.

So why are people so quick to assume the worst-case scenario (a hacker did it) instead of the simplest explanation (the software isn’t perfect)? I imagine it’s because of two factors. One, they have seen too many news stories and movies where hackers are portrayed with magical, almost godlike powers of technological influence as they tap away at their keyboards. People just don’t understand the realities of software vulnerabilities and exploits. And two, I think the fear of hackers is akin to the terror of sharks. Because sharks are portrayed in movies and TV as vicious monsters, and most people don’t understand them, they are perceived as utterly terrifying. Never mind that you’re 20 times more likely to be killed by a cow than a shark, and nearly 60 times more likely to be killed by a bee. And we are all 33,000 times more likely to be killed by a car than a shark. It’s the shark we fear. We fear what we don’t understand, and what we see on TV. And to most people, hackers are unfathomable, dreadful apparitions that can strike at any time, with no warning, for no reason.

Should we fear hackers? Absolutely. But should we fear them unreasonably, without cause? I think not. Come on, people, get it together. We all need to develop a sense of perspective.



Saturday, September 15, 2012

Intel's forum signals market shift from PC to mobile devices

Part of IDF was upstaged by Apple's iPhone 5 launch, but Intel stuck to the message that it remains relevant

This year's Intel Developer Forum was upstaged by Apple's iPhone 5 launch event, which to some show attendees felt like a reprise of last year, when IDF had to compete with Microsoft's Build conference.

Apple's event dominated the second day of IDF, with many attendees and press talking about the merits and drawbacks of the iconic smartphone rather than news from Intel. The company's jovial software chief, Renee James, joked about being the "opening act" for Apple in her speech soon before the iPhone event started.

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To some analysts and attendees, the clash between events this year was indicative of the industry shift from PCs, which is dominated by Intel, to mobile devices such as smartphones, where Intel is still trying to make its presence felt. Sales of PCs are fading as users turn to smartphones and tablets as alternatives.

Attendance at IDF this year was up slightly to 4,100 compared to 4,000 last year, according to an Intel spokeswoman, with those at the forum hearing about the new Haswell chip, the future of ultrabooks, and other emerging server, storage and networking technologies. Some found the conference useful as it offered sales leads and a chance to network.

Intel will remain relevant, especially with Microsoft's Windows 8 OS coming up, but this year it's at a crossroads with the market shifting and PC sales declining, said David Kanter, who runs the technology consulting firm Real World Technologies.

"This IDF was unique because you have an opportunity to contrast next door the iPhone 5 launch. In some ways that embodies the shift in the industry," Kanter said. "We have these new classes of devices emerging and there is some financial tension there."

But some attendees were disappointed with IDF.

"It's not been the best IDF. We've been coming to these events for many, many years. Seems like more Intel, less customers," said Stephen Gentile, senior vice president for strategy and business development at Insyde Software, which offers PC, server and tablet firmware and software development tools.

However, Insyde is a key partner for Intel, so the company decided to attend. The company has yet to decide whether it will attend again next year.

There was not much foot traffic at a booth for storage company Virident, which was staffed by inside sales manager Constantine Tikhoniouk. But he found there were other reasons to attend IDF.

"It's more of a forward-thinking conference than going after existing technologies. From that perspective it is very useful," Tikhoniouk said.

The show was surprisingly light on smartphones and tablets, with the focus squarely on ultrabooks, an emerging category of thin-and-light PCs with tablet features. Intel talked about new hybrid ultrabook models in which screens can be detached to become tablets, and new forms of touch, gesture and voice interaction with ultrabooks. Intel's message was clear -- ultrabooks are multifaceted devices that can be powerful laptops, but also tablets for those who desire mobility.

Intel also shed light on its upcoming Haswell chips, which will double performance while cutting power consumption to improve battery life on ultrabooks. Company executives in interviews also said they weren't happy with "good enough computing," possibly aiming at ARM, whose processors go into most tablets and smartphones. Intel offers more performance but lags ARM on power consumption, and the company hopes to catch up with its rival via advances in its manufacturing process.

Tablets and phones are becoming more powerful, but Intel has shown it has the capability to reduce power consumption on chips through Haswell. Intel is aware the industry is shifting and will move with it, Kanter said.

"Naturally, Intel would like that to shift back as they come out with more mobile devices and get into the cellphone space and tablets in a more serious way," Kanter said.

The progress on Haswell could reflect on Intel smartphone and tablet chips going into the future, said Jack Gold, principal analyst at J. Gold Associates.

"I wouldn't rule out mobiles. In fact, I estimate Intel will have a 10% market share in smartphones within two to three years, given its push towards lower power and the porting of Android to its chips," Gold said.

Intel has the advantage in process technology that should keep it highly competitive in the mobile space, Gold said.

But Intel's sheer dominance of the PC market continues to create business opportunities for On Semiconductor, which supplies power components to chip and board makers. The company has to advance and spread awareness about its technology as Intel makes chips smaller and more power efficient, and also needs to find new opportunities and contacts, said Mikhail Guz, senior director of low-voltage MOSFET BU at On Semiconductor.

"I think [IDF] may be a little lighter on traffic, I don't know if it's a sign of the times," Guz said. "But for the composition of attendees, it's relevant."

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Thursday, September 13, 2012

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Thursday, August 30, 2012

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Friday, August 24, 2012

CompTIA Advancing Women in IT Community Launches Mentoring Program

Group continues efforts to empower women pursuing careers in the IT field

Downers Grove, Ill., August 15, 2012 – CompTIA , the non-profit trade association for the information technology (IT) industry, today introduced a new mentoring program for women of all ages who are currently in or aspire to pursue careers in IT.

The mentoring program is the brainchild of the CompTIA Advancing Women in IT Community, which serves as a vital information resource for women in the IT industry. The newly launched mentoring program reinforces the group’s commitment to empowering women with the knowledge and skills necessary to help in their pursuit of successful IT careers, as well as inspiring other women to join the IT industry.

“CompTIA is thrilled to offer a mentoring platform to women interested in starting or growing a career in IT,” said Nancy Hammervik, senior vice president, industry relations, CompTIA. “We have a strong network of successful women who can offer advice, guidance and support. It’s important to have someone in your corner, cheering you on and challenging you to break down barriers and surpass your own expectations.”


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From the CompTIA Advancing Women in IT webpage, visitors can learn about careers in the IT industry; take advantage of educational resources, including certification information; and either volunteer to become a mentor or request to have a mentor. Based on information submitted via the online application, CompTIA will link programs applicants with an experienced IT professional.

The CompTIA Advancing Women in IT Community has also launched a new video highlighting the benefits of an IT career for women of all ages and backgrounds. The video conveys the message that the IT field is somewhere they can succeed, whether they’re in the midst of a career transition or looking to start a new career.

“The launch of the mentoring platform in conjunction with our video is the first of many programs that are slated to enhance, entice, promote and develop women in all aspects of IT,” said Sandra Ashworth, global director of channel relations and warranty, Unisys, and chair of the community.

“The mentoring platform will match expert women and men mentors to mentees to enable them to address all subjects from entering IT to advancement in their present career path,” Ashworth added. “This will be an evolving program that continually addresses changes in the industry, making it applicable as an aid both now and in the future.”

CompTIA communities are the foundation of the association’s initiatives, programs, education and research. These member-driven groups collaborate to advance specific technologies, vertical markets or business segments that are vital to the IT industry. Community members include IT professionals, vendors, distributors and thought leaders.

About CompTIA
CompTIA is the voice of the world’s information technology (IT) industry. Its members are the companies at the forefront of innovation; and the professionals responsible for maximizing the benefits organizations receive from their investments in technology. CompTIA is dedicated to advancing industry growth through its educational programs, market research, networking events, professional certifications, and public policy advocacy. For more information, visit http://www.comptia.org/home.aspx or follow CompTIA at http://www.facebook.com/CompTIA and http://twitter.com/comptia.

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Wednesday, August 22, 2012

Get To know Extra Concerning the Comptia A+ Certifications

The computer trade is previous doubt 1 of your fastest rising sectors everywhere on the planet. At the moment there are numerous organizations that provide accredited applications to those enthusiastic about pursuing facts experience careers. A superb instance is definitely the Computing technologies Trade Association, typically abbreviated as CompTIA. This non-revenue generating organization, founded in 1982, provides professional certifications in plenty of IT fields, including the CompTIA A++ certification, the Network+ certification, Server+, CTT+ plus the Security+ certification amongst a great number of other people. The rigorous exams involved have pushed candidates to hunt additional training from a lot of establishments similar to .

How A lot of Of these Courses Are Accredited?
Aside from just delivering Windows 7 certificate to profitable candidates, CompTIA also gives business membership. In mid 2007, three with the CompTIA+ certifications received accreditation from the American National Standards Institute. These are:



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CompTIA A++ certification
Network+ certification
Safety+ certification
At first of 2010, the certifications had been changed from lifetime ones to three 12 months certifications. This affected those that hadn’t but landed certification.

A+ Certification
The CompTIA A++ certification is issued to people who show competence as pc technicians. It covers really a lot of technologies akin to Apple, Microsoft and Linux. The exam for this certification, considering that getting incepted in 1993, has noticed plenty of versions. The 2009 version as an instance demands the candidate to pass two exams: Essentials and Sensible Software program 70-680 exams . Many the core topics coated inside the CompTIA A++ certification contain:
Direct Memory Access (DMA
Sensible laptop restore
IRQs
The exams are skewed in the direction of sensible applications somewhat than mere concept, and therefore are supposed for men and women with about 500 hours of sensible knowledge.

Community+ Certification
This CompTIA+ certification serves as a test to 1′s ability and capability as a community technician. Network+ certification exams ones understands of regions similar to:
Community hardware
Community setup
Network troubleshooting
The examination was launched in 1999 and has noticed a number of modifications considering that the flip in the millennium. It really is endorsed that one’s very first will get the CompTIA A++ certification and 9 month networking experience earlier than embarking on this exam.

Safety+ Certification
This handles subjects related to computer system safety and some company linked applications as well. These matters embody cryptography, access management, catastrophe restoration and danger administration amongst many other individuals. As of now, you can find just about 50,000 with the Security+ certification across the globe. Candidates are advised to initial search no less than two years of experience in safety linked function earlier than taking the various option exam.

Career Alternatives
The certifications from CompTIA are highly significant in lots of contemporary careers that combine IT into their chain. With almost all medium sized and massive enterprise institutions having inner computer networks, the CompTIA A++ certification and Network+ certification could be treasured additions to your resume. These enthusiastic about cutting a niche for themselves in contemporary day computerized security approaches will do together with the Security+ certification. The fact that these three are accredited offers you a seriously fantastic platform before potential employers. Within a planet the place every single portion is becoming computerized, you may’t afford to be left inside the dark.

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