Sunday, 24 May 2015

640-722 Exam Question

QUESTION NO : 18

Which description best describes upfade in a multipath environment?
A. In this situation, multiple signal paths are not sent at exactly the same time. The receiver receives a positive crest on the primary signal and a negative crest onthe secondary signal.
B. In this situation, the multiple signal paths are distorted and difficult to understand.
C. In this situation, the multiple signal paths are weaker than they should be because the signals are out of phase with each other.
D. In this situation, the signal is stronger than it should be because multiple signal paths are received twice at exactly the same time, which results in the multiple signals being in-phase.

Correct Answer: D

Thursday, 21 May 2015

Sen. John McCain: Cisco's Behavior in Russia 'Deserves Further Investigation'

Cisco economic sanctions against Russia are rubbed on the sale of its technical team, which caught the attention of Sen. John McCain.McCain (R-AZ) chairs the Senate Armed Services and pushed for more action from the United States against Russia in response to its participation in Ukraine and its annexation of Crimea.



BuzzFeed report, based on documents and view an anonymous source said that Moscow is aware of the operations of Cisco, Cisco accused of changing sales records and book deals with a false name to the client after sanctions began. In one case, Cisco has sold material that wound through the hands of the FSB, the successor to the KGB, but the records do not indicate FSB was the prospective purchaser.

Although Cisco has admitted that some customer names have changed, he said that these errors were innocent and vehemently denied all charges of its sales violated sanctions.
McCain called the situation "worrying" and said he "deserves further investigation," BuzzFeed said in a follow-up article.

Interestingly, the outgoing chief executive of Cisco, John Chambers, also a Republican, McCain knows well. Chambers was a supporter top of the 2008 presidential candidacy of McCain, donating more than 1.3 million.

Monday, 18 May 2015

640-722 Exam Question

QUESTION NO : 17

Which two statements about WiMAX technology are true? (Choose two.)

A. WiMAX is defined by 802.11i.
B. Typically, fixed WiMAX networks have a higher-gain directional antenna installed near the client.
C. WiMAX is capable of working as a long-range system over several miles.
D. WiMAX works only for licensed frequencies.

Correct Answer: B,C

Wednesday, 13 May 2015

Cisco Earnings: Another Rise in Revenue

Sales of switching systems continues to fuel network company’s turnaround:

 


Cisco Systems maintained their recent upturn in the last quarter, the reconstruction of the momentum in key markets as CEO for a long time, John Chambers, is preparing to leave the network equipment manufacturer upright.The reported net profit in its third fiscal quarter increased 12% on revenue that increased 5.1%. Cisco in February had projected increase in sales of 3% to 5%.

Mr. Chambers reiterated that the projection last week by announcing plans to give the title of lieutenant permanent CEO Chuck Robbins on July 26. "I could not be a better time to start the next chapter of Cisco," said Chambers , who intends to stay on as executive chairman.

For the current quarter, Cisco expects earnings and revenue in line with Wall Street estimates. Cisco shares, 28% in the last year, fell 0.7% in after-hours trading.The San Jose, Calif., The company has experienced a series of lackluster quarter in 2014. More recently, however, he helped by a recovery in sales of switching systems, the largest single company. The company faces stiff competition in this area, but has recently launched a new range of products that proves popular.

Cisco said the switching revenue increased 6% during the period ended April 25, Revenue routing equipment, other key communications various plumbing, increased 4% .But Cisco continues struggling team that cable companies use to deliver video to their subscribers, losing sales to rivals such as Arris Group Inc. and Casa Systems.

Cisco announced last week a long awaited product line designed to allow cable companies to provide Internet access and video. But Cisco said Wednesday that revenue for the segment of video service provider called dropped another 5%. Mr. Chambers said orders for all US service providers fell by 17%.

Another sticking point is China, where Cisco and other technology providers have been hurt by the suspicion of his links with the US intelligence agencies. Total sales of Cisco Asia Pacific increased 1% in the last quarter, but its China operations decreased by 20%, said Chambers. Russia has also been very low; the income of that country fell by 41% during the quarter, he said.


Cisco has held a series of boom-bust cycles under Mr. Chambers, often feeling the effects of industry trends earlier than their peers. He also fought against a number of opponents parts of its range of cutting-edge products. An example is Arista Networks Inc., a company run by former Cisco executives who captured considerable market share commutation.Recently, the company has had to face the dire predictions by proponents of a change of equipment at low cost Asian rivals and the migration of certain software task networks instead of specialized equipment.

Among a large number of responses, Mr. House has highlighted the role of Cisco as a partner wider able to provide its customers a wide range of hardware, software and consulting services. This strategy has attracted mainly government clients and Education, said Ken Leon, an analyst at Standard & Poors. Mr. Chambers said orders from federal government clients in the United States increased by 24% during the quarter.

"We went from selling boxes to collaborate with customers in their results," which said.In all, Cisco announced a net profit of $ 2.44 billion, or 47 cents per share, against a profit of 2 , $ 18 billion, or 42 cents per share a year earlier. Revenue rose to $ 12.14 billion of $ 11.55 billion.

Cisco reported earnings per share increased to 54 cents per share of 51 cents on an adjusted basis, which excludes stock-based compensation and other items. On that basis, analysts polled by Thomson Reuters expected a profit of 53 cents per share on revenue of 12.07 billion.

For the current period, which ends in July, Mr. Salas adjusted earnings per share of 55 cents to 57 cents profit. He estimated revenue increased 3% to 5% of the previous year quarter.Analysts on that basis had projected earnings per share of 56 cents, according to Thomson Reuters. They estimate revenue 12.59 billion, or 2% more than the same period of 2014.

Friday, 10 April 2015

640-722 Exam Question

QUESTION NO : 16


The IEEE 802.11n standard provides 40-MHz channels, improved MAC efficiency, and MIMO. Which three elements define the 802.11n implementation of MIMO? (Choose three.)

A. channel bonding
B. dynamic frequency selection
C. maximal ratio combining
D. packet aggregation
E. spatial multiplexing
F. transmit beam forming

Correct Answer: C,E,F

Friday, 3 April 2015

640-722 Exam Question

QUESTION NO : 15

The IEEE 802.11n standard provides 40-MHz channels, improved MAC efficiency, and MIMO. Which three elements define the 802.11n implementation of MIMO? (Choose three.)

A.
channel bonding
B. dynamic frequency selection
C. maximal ratio combining
D. packet aggregation
E. spatial multiplexing
F. transmit beam forming

Correct Answer: C,E,F

Tuesday, 3 February 2015

640-722 Exam Question

QUESTION NO : 14

Which governing body analyzes the applications and environments in which wireless networks are used?

A. EIRP
B. ETSI
C. FCC
D. IEEE
E. WiFi Alliance

Correct Answer: D