Question No 51:
Which are valid modes for a switch port used as a VLAN trunk? (Choose three.)
A. Transparent
B. Auto
C. On
D. Desirable
E. Blocking
F. Forwarding
Answer: B, C, D
Thursday 28 April 2016
Sunday 24 April 2016
Cisco Flags Five Product Vulnerabilities that Could Trigger Denial of Service
Cisco has published five security advisories on Wednesday, issuing software updates to patch a number of vulnerabilities in three products, any of which could potentially trigger a denial of service condition.
In other words, the exploitation of one of these flaws, an attacker could execute essentially a low-grade attack, denial of service against a company that uses the minimum bandwidth, even without the need for an army of robots. "A large distributed denial of Internet service (DDoS) would not even be necessary" if a vulnerability to denial of service exploded in a particular application, "Terrence Gareau, scientific director of the security company Network Nexusguard, SCMagazine said. com.
Cisco has created solutions for all these vulnerabilities and advises clients on all affected products to download updates for their products immediately.
The most critical of the five defects listed was a vulnerability in HTTP URL redirection functionality of multiple versions of Wireless LAN Controller (WLC) Cisco Software. An attacker could exploit the vulnerability remotely by sending an HTTP request designed, creating a buffer overflow condition that causes a hit to recharge and generate a crash file device.
David Larson, director of operations Corero Network Security, said in an interview SCMagazine.com use types of vulnerabilities, attackers can sometimes "get root access to the core. What this means is, that is not necessarily just a result of denial of service. This is the result of "property", "so that bad actors could take control or eliminate the entire network.
Gareau said two exploit of this nature in an environment as a center of health care "would be very devastating, especially since many hospitals use wireless networks."
There were two other vulnerabilities associated with Cisco WLC Software, both described as having a potential impact "high". Improper handling of traffic that involves software Hi Task Manager, while the other was a defect in its interface Web-based management, due to the presence of unsupported URL.
Cisco also reported a vulnerability in the processing subsystem encryption Secure real-time transport protocol Library (libSRTP), which affects Cisco Litany products including telephones, web conferencing servers, routers and security devices.
Finally, Cisco has reported a vulnerability in the functionality software repeat DHCPv6 Cisco Adaptive Security Appliance - a disconcerting revelation, to be sure, since it could use a denial-of-service attack that effectively overcomes security products Cisco network 5500- running this software as your firewall X Series next generation. The vulnerability specifically affects the release of ASA software 9.4.1 when configured in firewall mode and routing mode single or multiple context.
Larson said that default is "alarms me," and said he has "a major problem because many organizations could tolerate traffic bypass around your firewall if you have a catastrophic failure." And that could be exactly what an attacker wants so they can sneak malicious traffic within the network.
While exploiting this vulnerability could remotely be a bit of a challenge, the failure still pose a major threat to social engineers who steal credentials network registration of privileged information, or the most insidious threats. For example, Larson suggests that such a threat could manifest as "APT is already within the network, as a weapon for this particular vulnerability."
Asked to comment on vulnerabilities, Cisco made the following general statement SCMagazine.com: "Cisco is the safety of our customers first when we have a vulnerability in our products, issued a security warning to ensure that our customers know it. it is and how to fix it. "
Larson said that ultimately, security alerts as Cisco just published "highlights what I think is something that IT security should look more closely: Can you afford to have DDoS low grade in his environment and ignore "
In other words, the exploitation of one of these flaws, an attacker could execute essentially a low-grade attack, denial of service against a company that uses the minimum bandwidth, even without the need for an army of robots. "A large distributed denial of Internet service (DDoS) would not even be necessary" if a vulnerability to denial of service exploded in a particular application, "Terrence Gareau, scientific director of the security company Network Nexusguard, SCMagazine said. com.
Cisco has created solutions for all these vulnerabilities and advises clients on all affected products to download updates for their products immediately.
The most critical of the five defects listed was a vulnerability in HTTP URL redirection functionality of multiple versions of Wireless LAN Controller (WLC) Cisco Software. An attacker could exploit the vulnerability remotely by sending an HTTP request designed, creating a buffer overflow condition that causes a hit to recharge and generate a crash file device.
David Larson, director of operations Corero Network Security, said in an interview SCMagazine.com use types of vulnerabilities, attackers can sometimes "get root access to the core. What this means is, that is not necessarily just a result of denial of service. This is the result of "property", "so that bad actors could take control or eliminate the entire network.
Gareau said two exploit of this nature in an environment as a center of health care "would be very devastating, especially since many hospitals use wireless networks."
There were two other vulnerabilities associated with Cisco WLC Software, both described as having a potential impact "high". Improper handling of traffic that involves software Hi Task Manager, while the other was a defect in its interface Web-based management, due to the presence of unsupported URL.
Cisco also reported a vulnerability in the processing subsystem encryption Secure real-time transport protocol Library (libSRTP), which affects Cisco Litany products including telephones, web conferencing servers, routers and security devices.
Finally, Cisco has reported a vulnerability in the functionality software repeat DHCPv6 Cisco Adaptive Security Appliance - a disconcerting revelation, to be sure, since it could use a denial-of-service attack that effectively overcomes security products Cisco network 5500- running this software as your firewall X Series next generation. The vulnerability specifically affects the release of ASA software 9.4.1 when configured in firewall mode and routing mode single or multiple context.
Larson said that default is "alarms me," and said he has "a major problem because many organizations could tolerate traffic bypass around your firewall if you have a catastrophic failure." And that could be exactly what an attacker wants so they can sneak malicious traffic within the network.
While exploiting this vulnerability could remotely be a bit of a challenge, the failure still pose a major threat to social engineers who steal credentials network registration of privileged information, or the most insidious threats. For example, Larson suggests that such a threat could manifest as "APT is already within the network, as a weapon for this particular vulnerability."
Asked to comment on vulnerabilities, Cisco made the following general statement SCMagazine.com: "Cisco is the safety of our customers first when we have a vulnerability in our products, issued a security warning to ensure that our customers know it. it is and how to fix it. "
Larson said that ultimately, security alerts as Cisco just published "highlights what I think is something that IT security should look more closely: Can you afford to have DDoS low grade in his environment and ignore "
Thursday 21 April 2016
200-120 Exam Question No 50
Question No 50:
What is one benefit of PVST+?
A. PVST+ supports Layer 3 load balancing without loops.
B. PVST+ reduces the CPU cycles for all the switches in the network.
C. PVST+ allows the root switch location to be optimized per VLAN.
D. PVST+ automatically selects the root bridge location, to provide optimized bandwidth usage.
Answer: C
What is one benefit of PVST+?
A. PVST+ supports Layer 3 load balancing without loops.
B. PVST+ reduces the CPU cycles for all the switches in the network.
C. PVST+ allows the root switch location to be optimized per VLAN.
D. PVST+ automatically selects the root bridge location, to provide optimized bandwidth usage.
Answer: C
Thursday 14 April 2016
200-120 Exam Question No 49
Question No 49:
Each of these four switches has been configured with a hostname, as well as being configured to run RSTP. No other configuration changes have been made. Which three of these show the correct RSTP port roles for the indicated switches and interfaces? (Choose three.)
A. SwitchA, Fa0/2, designated
B. SwitchA, Fa0/1, root
C. SwitchB, Gi0/2, root
D. SwitchB, Gi0/1, designated
E. SwitchC, Fa0/2, root
F. SwitchD, Gi0/2, root
Answer: A, B, F
Each of these four switches has been configured with a hostname, as well as being configured to run RSTP. No other configuration changes have been made. Which three of these show the correct RSTP port roles for the indicated switches and interfaces? (Choose three.)
A. SwitchA, Fa0/2, designated
B. SwitchA, Fa0/1, root
C. SwitchB, Gi0/2, root
D. SwitchB, Gi0/1, designated
E. SwitchC, Fa0/2, root
F. SwitchD, Gi0/2, root
Answer: A, B, F
Sunday 10 April 2016
Cisco: A Safe, Cheap, Big Tech Stock Yielding 3.6%
Cisco Systems was a social gogo in the turn of the century, when its market value rose after the half-billion dollars.
Today, Cisco (ticker: CSCO) is much less even a better investment with a dividend yield of 3.6% in good health, assessment and convincing stability.
Like other technology heavyweights, Cisco has matured a tumultuous first that many smaller and younger players better quarter. Cisco shares have gained 23% since hitting a 52-week low in February.
And today, there is less naysayer among analysts sales. JP Morgan, who has been bearish on the stock market over the past two years, along with Cisco to neutral from low weight.
Shares rose 1.3% to $ 27.92.
Certainly, the analyst Rod Hall is not pounding the table on the stock. the earnings growth of Cisco's tibia. And with a target price of $ 27.50, Hall sees no place to head over the next year, arguing that at 12 times earnings forward, the world's largest maker of networking equipment business in line with its historical average.
Still, Cisco is trading at a big discount to the overall market. And after announcing a dividend increase of 24% in February (the increase in payment quarterly cash of 26 cents per share), Cisco has one of the highest returns of any cap value stock dividend in the Standard & Poor's 500, according to Hall.
Therefore, investors are paid to maintain a stock that faces little downside risk through prudent financial forecasts.
The main business of Cisco switches and routers is used to help connect computers to each other and to the Internet. This was under the pressure of increased competition.
Cisco has experienced faster growth in new types of products, including hardware and software conference. And some bulls see upside in its cloud business. However, a Cisco server recession expressed concern about spending business customers.
Consequently, analysts polled by Thomson Reuters see earnings per share increase of more than 4% at the end of this year in July to $ 2.30 on revenue of $ 49 billion. It expects earnings to increase to $ 2.39 per share next year.
Cisco in February called Barron "one of the cheapest ways to have a stable business generating large amounts of cash."
Cheap is correct. Even after its recent rally, Cisco will seek a reduction of almost 30%, both in the field of technology and the broader S & P 500. However, the company generated cash flow totaling $ 8,700 million over the last nine months and has completed its most recent quarter in January with more than $ 60 billion in cash on its balance sheet.
In February, Cisco has expanded its share repurchase plan of $ 15 billion. The company, meanwhile, has continued a streak of medium-sized transactions, including $ 320 million to acquire last month Israeli designer Leaba semiconductor chips.
However, some analysts do not see the value. Analyst at Bank of America-Merrill Lynch Tal Liani downgraded to neutral from buy Cisco, citing concerns about growth.
However, Liani raised his price target to $ 30, implying a price increase of nearly 8%. And if you give a multiple of Cisco market - 16.5 times earnings forward - that puts the stock at $ 37.
Today, Cisco (ticker: CSCO) is much less even a better investment with a dividend yield of 3.6% in good health, assessment and convincing stability.
Like other technology heavyweights, Cisco has matured a tumultuous first that many smaller and younger players better quarter. Cisco shares have gained 23% since hitting a 52-week low in February.
And today, there is less naysayer among analysts sales. JP Morgan, who has been bearish on the stock market over the past two years, along with Cisco to neutral from low weight.
Shares rose 1.3% to $ 27.92.
Certainly, the analyst Rod Hall is not pounding the table on the stock. the earnings growth of Cisco's tibia. And with a target price of $ 27.50, Hall sees no place to head over the next year, arguing that at 12 times earnings forward, the world's largest maker of networking equipment business in line with its historical average.
Still, Cisco is trading at a big discount to the overall market. And after announcing a dividend increase of 24% in February (the increase in payment quarterly cash of 26 cents per share), Cisco has one of the highest returns of any cap value stock dividend in the Standard & Poor's 500, according to Hall.
Therefore, investors are paid to maintain a stock that faces little downside risk through prudent financial forecasts.
The main business of Cisco switches and routers is used to help connect computers to each other and to the Internet. This was under the pressure of increased competition.
Cisco has experienced faster growth in new types of products, including hardware and software conference. And some bulls see upside in its cloud business. However, a Cisco server recession expressed concern about spending business customers.
Consequently, analysts polled by Thomson Reuters see earnings per share increase of more than 4% at the end of this year in July to $ 2.30 on revenue of $ 49 billion. It expects earnings to increase to $ 2.39 per share next year.
Cisco in February called Barron "one of the cheapest ways to have a stable business generating large amounts of cash."
Cheap is correct. Even after its recent rally, Cisco will seek a reduction of almost 30%, both in the field of technology and the broader S & P 500. However, the company generated cash flow totaling $ 8,700 million over the last nine months and has completed its most recent quarter in January with more than $ 60 billion in cash on its balance sheet.
In February, Cisco has expanded its share repurchase plan of $ 15 billion. The company, meanwhile, has continued a streak of medium-sized transactions, including $ 320 million to acquire last month Israeli designer Leaba semiconductor chips.
However, some analysts do not see the value. Analyst at Bank of America-Merrill Lynch Tal Liani downgraded to neutral from buy Cisco, citing concerns about growth.
However, Liani raised his price target to $ 30, implying a price increase of nearly 8%. And if you give a multiple of Cisco market - 16.5 times earnings forward - that puts the stock at $ 37.
Thursday 7 April 2016
200-120 Exam Question No 48
Question No 48:
Which two of these are characteristics of the 802.1Q protocol? (Choose two.)
A. It is used exclusively for tagging VLAN frames and does not address network reconvergence following switched network topology changes.
B. It modifies the 802.3 frame header, and thus requires that the FCS be recomputed.
C. It is a Layer 2 messaging protocol which maintains VLAN configurations across networks.
D. It includes an 8-bit field which specifies the priority of a frame.
E. It is a trunking protocol capable of carrying untagged frames.
Answer: B, E
Which two of these are characteristics of the 802.1Q protocol? (Choose two.)
A. It is used exclusively for tagging VLAN frames and does not address network reconvergence following switched network topology changes.
B. It modifies the 802.3 frame header, and thus requires that the FCS be recomputed.
C. It is a Layer 2 messaging protocol which maintains VLAN configurations across networks.
D. It includes an 8-bit field which specifies the priority of a frame.
E. It is a trunking protocol capable of carrying untagged frames.
Answer: B, E
Sunday 3 April 2016
MapR wins Cisco ISV Partner of the Year
And Data Analysis great company, Cisco won MAP Technologies ISV partners of the Year, The Pacific Japan (APJ).
If you give a channel Partners As an example, Regional Geographic Cisco Partner Summit awards recognize Practice Business Model Success surrounding Approaches selling led architecture, business programs is based on Innovative Strategic Results and practices.
"Committed MapR this Strategic Relationship with Cisco and to enable our joint customers to implement innovative applications, large global volumes data," said Vice President APJ MAPR Technologies dear Martin.
"We are very proud of our achievements successes there honored with Cisco to receive this prestigious award."
Partner organization Cisco Vice President APJ Ruma Balasubramanian, he said, "Cisco proud to work with partners around the world to direct v the innovation is the transformation digital customers is everywhere and create new solutions and business models for Our. Recognize the honor of UN is MapR Technologies, which: furthermore also emphasizes stellar achievements in the APJ region. "
If you give a channel Partners As an example, Regional Geographic Cisco Partner Summit awards recognize Practice Business Model Success surrounding Approaches selling led architecture, business programs is based on Innovative Strategic Results and practices.
"Committed MapR this Strategic Relationship with Cisco and to enable our joint customers to implement innovative applications, large global volumes data," said Vice President APJ MAPR Technologies dear Martin.
"We are very proud of our achievements successes there honored with Cisco to receive this prestigious award."
Partner organization Cisco Vice President APJ Ruma Balasubramanian, he said, "Cisco proud to work with partners around the world to direct v the innovation is the transformation digital customers is everywhere and create new solutions and business models for Our. Recognize the honor of UN is MapR Technologies, which: furthermore also emphasizes stellar achievements in the APJ region. "
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