Tuesday 24 September 2019
Thursday 25 April 2019
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MCSE and Other Evergreen IT Certifications 2019
Cisco Certified Internetwork Expert (CCIE)
The Cisco Certified Internetwork Expert (CCIE) remains one of the most coveted networking certifications available. Internationally recognized, the CCIE is an expert-level credential achievable by only the most skilled, technically proficient and experienced IT networking professionals. All roads in the Cisco certification path lead to the CCIE, making it a career pinnacle and the culmination of years of hard work, training and experience. CCIE credential holders are recognized by peers and employers as experts in their respective networking fields. Such skilled professionals possess superior network engineering skills and can manage and operate large, complex networks, as well as develop creative solutions to complex networking problems across a broad range of circumstances and technologies.
There are six CCIE certification specializations available, each corresponding to a Cisco certification path:
- Routing and Switching
- Collaboration
- Data Center
- Security
- Service Provider
- Wireless
In addition to a rigorous written exam, credential seekers must pass a strenuous lab exam. Labs are timed and designed to test technical skills such as problem determination and the ability to find solutions under stressful conditions. The CCIE lab exams have a well-deserved reputation of being difficult and demanding; many candidates must try two or more times to pass them. At $1,600 plus travel costs for each try, that's an expensive proposition.
In 2015, Cisco updated all its expert-level, written exams to include a new domain focused on new and emerging technologies. This new domain, aptly named Evolving Technologies, remains focused on three areas: Cloud, Internet of Things (IoT) and Network Programmability. (Focus areas may change as additional technologies are introduced and adopted.) The Evolving Technologies domain constitutes 10 percent of the total CCIE exam and targets conceptual comprehension. Earning a CCIE is time-intensive and requires real effort and commitment. IT professionals who like a marathon will find the rewards at the end of the journey — recognition, prestige and earning potential, to name a few — make the CCIE credential well worth the work involved in earning one. A CCIE is a long-term career goal worth considering for IT professionals serious about their networking careers.
Required courses: None.
Required exams: Each CCIE certification path requires a written and lab exam. Written exam scores are valid for 18 months. Thus also, lab exams must be attempted within 18 months of passing the written exam. CCIE candidates may not schedule a lab exam until they receive a passing score on the written exam. Candidates must retake the written exam if they do not pass the lab exam within three years.
Monday 11 February 2019
Cisco CCENT 100-105 Practice Test Questions - 100-105 Exam | Realexamdumps.com
For Immediate Release
Chicago, IL – February 11, 2018 – Zacks.com releases the list of companies likely to issue earnings surprises. This week’s list includes Under Armour UAA, Activision Blizzard ATVI, Nike NKE, Groupon GRPN and Cisco CSCO.
Earnings Growth Deceleration Details
The picture emerging from the Q4 earnings season is not great, but it is not as bad either as many in the market had feared ahead of the start of this earnings season.
We knew that the period of very strong growth was now behind us. But the steady negative revisions to earnings estimates for the current and coming quarters have left growth expectations for the first half of 2019 barely in positive territory. This negative revisions trend is a function of uncertainty about global economic growth, with a host of leading companies in different industries citing weakness in China, Europe and elsewhere as the driver of weak guidance.
We will share the current scorecard and what’s on deck this week a little later, but let’s first point out the key trends that we have seen from the Q4 results through Friday, February 8th.
First, growth is decelerating. This isn’t a surprise, as we knew already that Q4 growth would be materially below the pace set in the first three quarters of the year.
Total earnings for the 332 companies that have reported are up +13.4% from the same period last year on +7.2% higher revenues. Earnings and revenue growth for the same cohort of companies had been +24.3% and +9.7% in the preceding earnings season, respectively.
The growth pace is on track to decelerate even further in the current and coming quarters, as we will show a little later.
Second, companies appear to be struggling to beat consensus EPS estimates.
For the 332 index members that have reported results already, 67.2% are beating EPS estimates and only 62% are beating revenue estimates. For the same cohort of companies, the proportion of positive EPS and revenue surprises was 78.6% and 60.8% in the Q3 earnings season, respectively.
The proportion of these 332 index members beating both EPS and revenue estimates is 46.7%, which compares to 50.9% for the same group of companies in the preceding reporting cycle and 12-quarter average of 53.9%.
The revenue beats percentage is on the weak side relative to historical periods, but the lag on the EPS beats percentage side is particularly noteworthy. The fact is that the Q4 EPS beats percentage is the lowest in more than 3 years.
With Q4 positive surprises this hard to come by, one would reasonably assume that perhaps estimates had been too high. We know that wasn’t the case as estimates for the quarter had fallen the most of any other recent periods.
Third, estimates for 2019 Q1 and full-year 2019 are coming down in a major way, with the Q1 growth rate now in negative territory.
Negative revisions to 2019 Q1 estimates are along the same lines that we saw ahead of the start of the Q4 earnings season as well. Estimates for full-year 2019 have been coming down as well. Estimates were effectively unchanged during the September quarter, but they have been on a consistent downtrend since early October. Many in the market suspect that estimates have further to drop before stabilizing.
Key Earnings Reports This Week
We have more than 400 companies coming out with quarterly reports this week, including 63 S&P 500 members.
Tuesday, February 12th: We have 15 index members reporting results on Tuesday, of which 9 will come out before the market’s open and the rest after the market’s close. There is no shortage of big-name reporters today, but Under Armour will be the notable report in the morning session and Activision Blizzard after the market’s close. Under Armour shares jumped following the Q3 earnings release on October 30th and even though the stock has since lost ground, it is still up big over the past year, up +57.3% vs. +31.3% gain for Nike and +5.1% gain for the S&P 500 index.
Activision Blizzard and other game publishers have been struggling lately, with Epic Games’ Fortnight stealing their thunder. While estimates for the December quarter have been stable, the same for full-year have been steadily coming down. The stock is down -34% over the past year, lagging its industry’s -25.3% decline over the same time period
Chicago, IL – February 11, 2018 – Zacks.com releases the list of companies likely to issue earnings surprises. This week’s list includes Under Armour UAA, Activision Blizzard ATVI, Nike NKE, Groupon GRPN and Cisco CSCO.
Earnings Growth Deceleration Details
The picture emerging from the Q4 earnings season is not great, but it is not as bad either as many in the market had feared ahead of the start of this earnings season.
We knew that the period of very strong growth was now behind us. But the steady negative revisions to earnings estimates for the current and coming quarters have left growth expectations for the first half of 2019 barely in positive territory. This negative revisions trend is a function of uncertainty about global economic growth, with a host of leading companies in different industries citing weakness in China, Europe and elsewhere as the driver of weak guidance.
We will share the current scorecard and what’s on deck this week a little later, but let’s first point out the key trends that we have seen from the Q4 results through Friday, February 8th.
First, growth is decelerating. This isn’t a surprise, as we knew already that Q4 growth would be materially below the pace set in the first three quarters of the year.
Total earnings for the 332 companies that have reported are up +13.4% from the same period last year on +7.2% higher revenues. Earnings and revenue growth for the same cohort of companies had been +24.3% and +9.7% in the preceding earnings season, respectively.
The growth pace is on track to decelerate even further in the current and coming quarters, as we will show a little later.
Second, companies appear to be struggling to beat consensus EPS estimates.
For the 332 index members that have reported results already, 67.2% are beating EPS estimates and only 62% are beating revenue estimates. For the same cohort of companies, the proportion of positive EPS and revenue surprises was 78.6% and 60.8% in the Q3 earnings season, respectively.
The proportion of these 332 index members beating both EPS and revenue estimates is 46.7%, which compares to 50.9% for the same group of companies in the preceding reporting cycle and 12-quarter average of 53.9%.
The revenue beats percentage is on the weak side relative to historical periods, but the lag on the EPS beats percentage side is particularly noteworthy. The fact is that the Q4 EPS beats percentage is the lowest in more than 3 years.
With Q4 positive surprises this hard to come by, one would reasonably assume that perhaps estimates had been too high. We know that wasn’t the case as estimates for the quarter had fallen the most of any other recent periods.
Third, estimates for 2019 Q1 and full-year 2019 are coming down in a major way, with the Q1 growth rate now in negative territory.
Negative revisions to 2019 Q1 estimates are along the same lines that we saw ahead of the start of the Q4 earnings season as well. Estimates for full-year 2019 have been coming down as well. Estimates were effectively unchanged during the September quarter, but they have been on a consistent downtrend since early October. Many in the market suspect that estimates have further to drop before stabilizing.
Key Earnings Reports This Week
We have more than 400 companies coming out with quarterly reports this week, including 63 S&P 500 members.
Tuesday, February 12th: We have 15 index members reporting results on Tuesday, of which 9 will come out before the market’s open and the rest after the market’s close. There is no shortage of big-name reporters today, but Under Armour will be the notable report in the morning session and Activision Blizzard after the market’s close. Under Armour shares jumped following the Q3 earnings release on October 30th and even though the stock has since lost ground, it is still up big over the past year, up +57.3% vs. +31.3% gain for Nike and +5.1% gain for the S&P 500 index.
Activision Blizzard and other game publishers have been struggling lately, with Epic Games’ Fortnight stealing their thunder. While estimates for the December quarter have been stable, the same for full-year have been steadily coming down. The stock is down -34% over the past year, lagging its industry’s -25.3% decline over the same time period
Friday 1 February 2019
Friday 27 April 2018
Download Valid Cisco 100-105 Exam Study Guide - 100-105 Questions Answers Realexamdumps.com
Question No : 1
Which table displays the MAC addresses that are learned on a switch?
A. FIB
B. ARP
C. TCAM
D. CAM
Answer: D
Explanation:
The table is built by recording the source address and inbound port of all frames. As frames arrive on switch ports, the source MAC addresses are learned and recorded in the CAM table. The port of arrival and the VLAN are both recorded in the table, along with a timestamp. If a MAC address learned on one switch port has moved to a different port, the MAC address and timestamp are recorded for the most recent arrival port. Then, the previous entry is deleted. If a MAC address is found already present in the table for the correct arrival port, only its timestamp is updated.
Question No : 5
Which table displays the MAC addresses that are learned on a switch?
A. FIB
B. ARP
C. TCAM
D. CAM
Answer: D
Explanation:
The table is built by recording the source address and inbound port of all frames. As frames arrive on switch ports, the source MAC addresses are learned and recorded in the CAM table. The port of arrival and the VLAN are both recorded in the table, along with a timestamp. If a MAC address learned on one switch port has moved to a different port, the MAC address and timestamp are recorded for the most recent arrival port. Then, the previous entry is deleted. If a MAC address is found already present in the table for the correct arrival port, only its timestamp is updated.
Question No : 2
How does TCP differ from UDP? (Choose two.)
A. TCP provides best effort delivery.
B. TCP provides synchronized communication.
C. TCP segments are essentially datagrams.
D. TCP provides sequence numbering of packets.
E. TCP uses broadcast delivery.
Answer: B,D
Explanation:
TCP differs from UDP in the following ways: TCP provides best effort delivery.
TCP provides synchronized communication. TCP segments are essentially datagrams.
TCP provides sequence numbering of packets. TCP uses broadcast delivery.
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Question No : 3
Drag and Drop Question
Answer:
Question No : 4
A workstation has just resolved a browser URL to the IP address of a server. What protocol will the workstation now use to determine the destination MAC address to be placed into frames directed toward the server?
A. HTTP
B. DNS
C. DHCP
D. RARP
E. ARP
Answer: E
Explanation:
The RARP protocol is used to translate hardware interface addresses to protocol addresses. The RARP message format is very similar to the ARP format. When the booting computer sends the broadcast ARP request, it places its own hardware address in both the sending and receiving fields in the encapsulated ARP data packet. The RARP server will fill in the correct sending and receiving IP addresses in its response to the message. This way the booting computer will know its IP address when it gets the message from the RARP server.
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Question No : 5
The network manager has requested a 300-workstation expansion of the network. The workstations are to be installed in a single broadcast domain, but each workstation must have its own collision domain. The expansion is to be as cost-effective as possible while still meeting the requirements. Which three items will adequately fulfill the request? (Choose three).
A. one IP subnet with a mask of 255.255.254.0
B. two IP subnets with a mask of 255.255.255.0
C. seven 48-port hubs
D. seven 48-port switches
E. one router interface
F. seven router interfaces
Answer: A,D,E
Explanation:
of 255.255.254.0 can absorb 510 hosts being 23 bits mask and also 7*48 port switches can handle this much hosts and router interface is required to be minimum to avoid unnecessary wastage hence the answers.
Question No : 6
Which set of conditions comprises a successful ping attempt between two connected routers configured with IP addresses on the same subnet?
A. The destination host receives an echo reply from the source host within one second and the source host receives an echo request from the destination host.
B. The destination host receives an echo request from the source host within one second.
C. The destination host receives an echo reply from the source host within one second and the source host receives an echo reply from the destination host within two seconds.
D. The destination host receives an echo request from the source host and the source host receives an echo request from the destination host within one second.
E. The destination host receives an echo request from the source host and the source host receives an echo reply from the destination host within two seconds.
Answer: D
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Question No : 7
Which two statements describe the operation of the CSMA/CD access method? (Choose two.)
A. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.
B. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.
C. The use of hubs to enlarge the size of collision domains is one way to improve the operation of the CSMA/CD access method.
D. After a collision, the station that detected the collision has first priority to resend the lost data.
E. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired,all stations have equal priority to transmit data.
F. After a collision, all stations involved run an identical backoff algorithm and then synchronize with each other prior to transmitting data.
Answer: B,E
Explanation:
Ethernet networking uses Carrier Sense Multiple Access with Collision Detect (CSMA/CD), a protocol that helps devices share the bandwidth evenly without having two devices transmit at the same time on the network medium. CSMA/CD was created to overcome the problem of those collisions that occur when packets are transmitted simultaneously from different nodes. And trust me, good collision management is crucial, because when a node transmits in a CSMA/C network, all the other nodes on the network receive and examine that transmission. Only bridges and routers can effectively prevent a transmission from propagating throughout the entire network! So, how does the CSMA/CD protocol work? Like this: when a host wants to transmit over the network, it first checks for the presence of a digital signal on the wire. If all is clear (no other host is transmitting), the host will then proceed with its transmission. But it doesn't stop there. The transmitting host constantly monitors the wire to make sure no other hosts begin transmitting. If the host detects another signal on the wire, it sends out an extended jam signal that causes all nodes on the segment to stop sending data (think, busy signal). The nodes respond to that jam signal by waiting a while before attempting to transmit again. Backoff algorithms determine when the colliding stations can retransmit. If collisions keep occurring after 15 tries, the nodes attempting to transmit will then time out.
Question No : 8
What are two common TCP applications? (Choose two.)
A. TFTP
B. SMTP
C. SNMP
D. FTP
E. DNS
Answer: B,D
Explanation:
SMTP uses TCP port 25, while FTP uses TCP ports 20 and 21.
http://pentestlab.wordpress.com/2012/03/05/common-tcpip-ports/
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Question No : 9
Which OSI layer header contains the address of a destination host that is on another network?
A. application
B. session
C. transport
D. network
E. data link
F. physical
Answer: D
Explanation:
Only network address contains this information. To transmit the packets the sender uses network address and datalink address. But the layer 2 address represents just the address of the next hop device on the way to the sender. It is changed on each hop. Network address remains the same.
Question No : 10
Which command displays the number of times that an individual router translated an inside address to an outside address?
A. show ip protocol 0
B. show ip nat translation
C. show counters
D. show ip route
E. show ip nat statistics
Answer: D
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Wednesday 20 December 2017
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Question No : 1
How does TCP differ from UDP? (Choose two.)
A. TCP provides best effort delivery.
B. TCP provides synchronized communication.
C. TCP segments are essentially datagrams.
D. TCP provides sequence numbering of packets.
E. TCP uses broadcast delivery.
Answer: B,D
Explanation:
Because TCP is a connection-oriented protocol responsible for ensuring the transfer of a datagram from the source to destination machine (end-to-end communications), TCP must receive communications messages from the destination machine to acknowledge receipt of the datagram. The term virtual circuit is usually used to refer to the handshaking that goes on between the two end machines, most of which are simple acknowledgment messages (either confirmation of receipt or a failure code) and datagram sequence numbers. Rather than impose a state within the network to support the connection, TCP uses synchronized state between the two endpoints. This synchronized state is set up as part of an initial connection process, so TCP can be regarded as a connection-oriented protocol. Much of the protocol design is intended to ensure that each local state transition is communicated to, and acknowledged by, the remote party.
Reference:
http://en.wikibooks.org/wiki/Communication_Networks/TCP_and_UDP_Protocols
How does TCP differ from UDP? (Choose two.)
A. TCP provides best effort delivery.
B. TCP provides synchronized communication.
C. TCP segments are essentially datagrams.
D. TCP provides sequence numbering of packets.
E. TCP uses broadcast delivery.
Answer: B,D
Explanation:
Because TCP is a connection-oriented protocol responsible for ensuring the transfer of a datagram from the source to destination machine (end-to-end communications), TCP must receive communications messages from the destination machine to acknowledge receipt of the datagram. The term virtual circuit is usually used to refer to the handshaking that goes on between the two end machines, most of which are simple acknowledgment messages (either confirmation of receipt or a failure code) and datagram sequence numbers. Rather than impose a state within the network to support the connection, TCP uses synchronized state between the two endpoints. This synchronized state is set up as part of an initial connection process, so TCP can be regarded as a connection-oriented protocol. Much of the protocol design is intended to ensure that each local state transition is communicated to, and acknowledged by, the remote party.
Reference:
http://en.wikibooks.org/wiki/Communication_Networks/TCP_and_UDP_Protocols
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