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CCNA Qualifications ; Satisfaction Guaranteed

CCNA Qualifications ; Satisfaction Guaranteed

CCNA Security Certification
Cisco Certified Network Associate Security (CCNA Security) validates associate-level knowledge and skills required to secure Cisco networks. With a CCNA Security certification, a network professional demonstrates the skills required to develop a security infrastructure, recognize threats and vulnerabilities to networks, and mitigate security threats. The CCNA Security curriculum emphasizes core security technologies, the installation, troubleshooting and monitoring of network devices to maintain integrity, confidentiality and availability of data and devices, and competency in the technologies that Cisco uses in its security structure.

CCNA Security Recertification
CCNA Security certifications are valid for three years. To recertify, pass ONE of the following before the certification expiration date:

Pass any current CCNA Concentration exam (wireless, or security, or voice, or SP Ops), or
Pass any current 642-XXX Professional level exam, or
Pass the current CCDA DESGN exam, or
Pass any current Cisco Specialist exam (excluding Sales Specialist exams or MeetingPlace Specialist exams, Implementing Cisco TelePresence Installations (ITI) exams, Cisco Leading Virtual Classroom Instruction exams, or any 650 online exams), or
Pass any current CCIE Written Exam, or
Pass the current CCDE Written Exam or current CCDE Practical Exam, or
Pass the Cisco Certified Architect (CCAr) interview and the CCAr board review to extend lower certifications

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Cisco answers user questions about upcoming Apple Bonjour Gateway

Cisco answers user questions about upcoming Apple Bonjour Gateway
New code will coordinate iOS, OS X client requests over big networks

To cope with the rising tide of iOS devices trying to use Apple's Bonjour discovery protocol on enterprise networks, Cisco recently announced that it is building a Bonjour gateway for its wireless LAN controllers. The company replied to nine follow-up questions after an online webinar for IT professionals about the product.

The gateway is intended to make Bonjour-based technologies like AirPlay and AirPrint better-behaved on enterprise networks. Some webinar attendees came away with some unasked or unanswered questions. Jameson Blandford, a technical marketing engineer with the gateway's product management group, replies via email below. (The webinar reply is available online.)

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The behavior of Apple products on corporate networks is an urgent issue for many IT groups. Historically, Apple products used to be relegated to niches in big companies. But with the advent of the iPhone and now the iPad, most large U.S. companies have become Apple customers on a scale never before imagined. These devices use Bonjour, which is Apple's implementation of "zero configuration networking" or zeroconf, which is a group of open Layer 2 protocols to automatically and quickly set up an IP network, without having to set up services such as Dynamic Host Configuration Protocol, DNS and DNS Service Directory.

Apple devices use Bonjour to discover and link with each other, with printers running Apple's AirPrint software, and with devices like the Apple TV box, which acts like an interface between client iOS and OS X devices and flat panel TVs or selected Internet video content providers.

But Bonjour is designed for simple, single networks, not more complex corporate networks that may include scores or hundreds of subnets. It's not routable, and it can generate very heavy amounts of broadcast traffic over big networks with lots of Apple clients and services. A group of higher-education IT managers, part of Educause, recently created a petition asking Apple to make changes in Bonjour and other technologies to address these issues.

Cisco's new code will turn its WLAN controllers into a Bonjour gateway, and couple this with policy-based end user privileges. For users, this will mean that Apple clients will be able to find and access network-attached AirPrint printers, Apple TVs and the like on different subnets, so everything will "just work" as it does on their own home networks. A second expected result will be a big decrease in the amount of Bonjour-based discovery traffic that today is putting a heavy load on enterprise nets teeming with Apple's MacBook laptops, iPhones, iPads and more.

Aerohive released in July an update to its HiveOS WLAN software, now incorporating a Bonjour gateway. Aruba Networks will ship a similar product, announced in March, before year-end.

After the Cisco webinar, IT professionals raised a number of questions about Cisco's implementation. Here are the questions and Blandford's answers.

Some of Cisco's support documentation for dealing with Bonjour mentions the Avahi software, an open-source zeroconf implementation. Is Cisco's pending Bonjour Gateway based on, or incorporate-and-make-use-of Avahi?

The gateway is not based on Avahi.

The webinar's demo showed wireless clients, but didn't seem to address wired clients, such as a wired Apple TV. Will the Cisco gateway handle wired Bonjour devices?

The Bonjour Services Directory will snoop for devices on both the wireless and wired-side of the network. [For example,] when a client on the wireless side of the network requests the "AirPlay" service, the controller will return back both the Apple TV on the wired network, and the Apple TV on the wireless network.

Will customers need to have a wireless LAN controller on each routing node in the network, to ensure that VLANs (subnets) can reach the controller? If VLANs cross a Layer 3 boundary, will a controller be needed to terminate them?

In the initial release, the VLAN of wired Bonjour devices must be trunked to the [WLAN] controller so that their advertisements can be seen. We recognize this presents a challenge for customers with distributed networks -- so we are exploring the capability for the [Aironet WLAN] access point to also snoop Bonjour traffic. With this flexible solution, a "Bonjour Detector" AP can be placed anywhere in the network and snoop Bonjour for all of the devices on that wired segment while sending relevant service entries back to the controller's master database.

In the future we are also looking at leveraging other Cisco devices in the network that can perform wired-side snooping and improve the reach of the solution.

Does Cisco have any plans to incorporate the Bonjour GW in their IOS firmware running on their Catalysts?

This is a logical place for wired-side Bonjour snooping. However we cannot comment on official roadmap positions.

In the webinar, Cisco said it will use filtering to restrict which clients can see which services (Apple TV's, etc). What will Cisco use to filter Bonjour requests?

The filtering options are:
· Per WLAN/SSID
· Per VLAN or AP Group
· Per Interface Group (which is a group of VLANs pooled together).

A Bonjour service policy can be created and applied on any one of the above criteria. In the future, we will support per-user Bonjour service policies which will come as a RADIUS attribute from the AAA server.

Will Cisco support location-aware service discovery to limit the number of, for example, Apple TVs that might show up on an iPhone or iPad in response to a discover request?

We are actively investigating how the physical location of the wireless client can be used to provide a pin-pointed service list with only the Apple TVs, printers, etc. which are nearby. No comment on availability yet.

Does roaming work with the Gateway, and if so how?

Yes, Layer 3 roaming across controllers works to ensure users moving amongst access points on different controllers continue to see the devices they saw on the original controller. The Bonjour services on the anchor controller will be displayed to the client included both wired and wireless devices.

here was some confusion about whether the Gateway actually use multicast to deliver Bonjour services to clients. One person said it does not. Is this correct?

This is correct, the controller sends the response back to the client via unicast so that other clients do not hear any services they are not supposed to see. For subsequent connections after service discovery (such as an iPad mirroring the screen to the Apple TV) these are unicast, and between the two end devices, using Apple's own protocol.

How specific can you be about the beta release of the Gateway?

Beta for the v7.4 release will be in Oct/Nov of this year [2012].

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Cisco readying a new Nexus switch

Nexus 3500 will feature ultra low latency, target Infiniband

Cisco has another Nexus Ethernet data center switch in the works, this one with ultra-low latency and a more formidable rival to Infiniband.

Details on the Nexus 3500 are unavailable. Cisco wouldn't discuss it when asked about an online ad seeking a software engineer for it.

"This is to be announced later," a Cisco spokesperson e-mailed. "No details to share yet."

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Sources, however, say the Nexus 3500 will feature 250 nanosecond port-to-port latency and integrated network address translation. They say it will give Infiniband a run for the money, especially when combined with a new NIC from Cisco called usNIC.

"If this product does come out with latency as stated, it will dominate the silicon industry slamming down on Broadcom and more importantly Fulcrum," the source says. "But also compete with Mellanox and close the gap with Infiniband. Cisco will be untouchable in ultra low latency switching."

RedHat has apparently run tests of usNIC with its MRG-M high performance computing software. Slides 16-18 of this presentation appear to show performance improvements of MRG-M when running usNIC vs. Infiniband.

Red Hat was not immediately available for comment. But our source said it, along with the Nexus 3500, could be a viable alternative to Infiniband.

"That, combined with this new Nexus 3500 having 250ns latency would be a compelling solution against Infiniband," the source said. "If Cisco launches Nexus 3500 in the next few months and combines usNIC in the launch it will finally be the first Ethernet solution that can compete against (Infiniband)...(and) shows Cisco intent to kill Infiniband with Ethernet."

Mellanox is a leading Infiniband networking vendor. Requests to the company for comment were not answered by posting time.

Cisco currently offers the Nexus 3000 line for low-latency, top-of-rack switching targeted at high-frequency financial trading, as well as the Nexus 7000, 5000 and 2000 lines for data center fabric switching.

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640-461 Q&A / Study Guide/ Testing Engine / Videos

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QUESTION 1
Which two options are features in Cisco Unified Presence? (Choose two.)

A. IP Phone Messenger
B. Native Presence
C. BLF speed-dial
D. Enterprise Instant Messaging
E. BLF speed-dial pickup

Answer: A,D

Explanation:

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QUESTION 2
An end user reports that they are unable to control their Cisco IP phone using Cisco Unified
Personal Communicator and cannot make any calls. Which situation can cause this issue?

A. The Cisco Unified Personal Communicator is not registered in the Cisco Unified Presence
server.
B. The LDAP integration is incorrect.
C. The Cisco Unified Personal Communicator is configured in desk-phone mode.
D. The Allow Control of Device from CTI checkbox in the device configuration on Cisco Unified
Communications Manager is disabled.
E. The Allow Control of Device from CTI checkbox in the device configuration on the Cisco Unified
Presence is disabled.

Answer: D

Explanation: Link:
http://www.cisco.com/en/US/docs/voice_ip_comm/cups/8_0/english/install_upgrade/deployment/g
uide/dgclient.html

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QUESTION 3
Which description describes the low latency queuing algorithm?

A. Empty queue 1. If queue 1 is empty, empty queue 2, then empty queue 3, unless a packet for a
higher queue arrives.
B. An administrator defines the traffic classes based on match criteria, including protocols, access
control lists, and input interfaces.
C. A flow-based algorithm that simultaneously schedules interactive traffic to the front of a queue
to reduce response time and fairly shares the remaining bandwidth among high-bandwidth flows.
D. This feature brings strict priority queuing to CBWFQ.
E. Packets are placed into a single queue and serviced in the order they were received.

Answer: D

Explanation: A & C denotes to weighted fair queue or DWFQ. B denotes to CBWFQ (class based
weighted fair queue).
Link:
http://www.cisco.com/en/US/docs/ios/12_1/qos/configuration/guide/qcdconmg.html#wp1001019

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QUESTION 4



Answer:



Explanation:

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QUESTION 5
An administrator wants to locate and remove all unassigned directory numbers on the Cisco
Unified Communications Manager system. Which method is the best method to accomplish this
task?

A. Choose Device > Phone. Search all phones and remove the undesired directory numbers.
B. Use the Dial Plan Installer to remove the directory numbers.
C. Use the Disaster Recovery System to restore only valid directory numbers.
D. Choose Call Routing > Route Plan Report, choose the Unassigned DN drop-down menu, and
then remove all orphaned directory numbers.
E. Choose Device > Device Settings > Device Defaults and use the wizard to locate and remove
the orphaned directory numbers.

Answer: D

Explanation:
A. Assigned phone could be deleted from device>phone option. E. Device defaults
are used to updating devices.
Link:
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_5_1/ccmcfg/b03rtrep.html#wp1024696

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642-883 Q&A / Study Guide / Testing Engine / Videos

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QUESTION 1
Refer to the OSPF command exhibit.



Which effect does the no-summary command option have?

A. It will cause area 1 to be able to receive non-summarized inter-area routes.
B. It will cause area 1 to not receive any inter-area routes and will use a default route to reach
networks in other areas.
C. It will cause area 1 to not receive any external routes and will use a default route to reach the
external networks.
D. It will convert the NSSA area into a NSSA totally stubby area.
E. It will convert the stubby area into a NSSA.
F. It will disable OSPF auto-summary.

Answer: B

Explanation:

---

QUESTION 2
When troubleshooting OSPF neighbor errors, which three verification steps should be considered?
(Choose three.)

A. Verify if neighboring OSPF interfaces are configured in the same area.
B. Verify if neighboring OSPF interfaces are configured with the same OSPF process ID.
C. Verify if neighboring OSPF interfaces are configured with the same OSPF priority.
D. Verify if neighboring OSPF interfaces are configured with the same hello and dead intervals.
E. Verify if neighboring OSPF interfaces are configured with the same area type.

Answer: A,D,E

Explanation:

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QUESTION 3
On Cisco IOS XR Software, which set of commands is used to enable the gi0/0/0/1 interface for OSPF in area 0?

A. interface gi0/0/0/0
ip address 10.1.1.1 255.255.255.0
!
router ospf 1
network 10.1.1.1 0.0.0.0 area 0
B. interface gi0/0/0/0
ip address 10.1.1.1 255.255.255.0
!
router ospf 1
network 10.1.1.1 255.255.255.255 area 0

C. router ospf 1
area 0
interface GigabitEthernet0/0/0/1

D. interface gi0/0/0/0
ip address 10.1.1.1 255.255.255.0
ip ospf 1 area 0

E. router ospf 1
address-family ipv4 unicast
interface GigabitEthernet0/0/0/1 area 0

F. router ospf 1
address-family ipv4 unicast
interface GigabitEthernet0/0/0/1
area 0

Answer: C

Explanation:

---

QUESTION 4
Which three statements are true regarding the OSPF router ID? (Choose three.)

A. The OSPF routing process chooses a router ID for itself when it starts up.
B. The router-id command is the preferred procedure to set the router ID.
C. If a loopback interface is configured, its address will always be preferred as the router ID overany other methods.
D. After the router ID is set, it does not change, even if the interface that the router is using for the
router ID goes down. The router ID changes only if the router reloads or if the OSPF routingprocess restarts.
E. In OSPF version 3, the OSPF router ID uses a 128-bit number.

Answer: A,B,D

Explanation:

---

QUESTION 5
Which two OSPF network scenarios require OSPF virtual link configuration? (Choose two.)

A. to connect an OSPF non-backbone area to area 0 through another non-backbone area
B. to connect an NSSA area to an external routing domain
C. to connect two parts of a partitioned backbone area through a non-backbone area
D. to enable route leaking from Level 2 into Level 1
E. to enable route leaking from Level 1 into Level 2
F. to enable OSPF traffic engineering

Answer: A,C

Explanation:

---

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Cisco Intros New UCS Blade, Rack Servers

The new Intel-based systems are aimed at a wide range of workloads, from virtualization and databases to Web 2.0 and big data.

Cisco Systems is expanding its converged Unified Computing Systems portfolio, adding four new Intel-powered servers that are primarily aimed at scale-out environments as well as a new virtual networking card.

The offerings include two new rack servers and a blade server powered by Intel’s new Xeon E5-2400 chips for dual-socket systems, and another blade system running on Xeon E5-4600 processors, for four-socket servers. Intel released the two chip families in May, complementing the Xeon E5-2600 processors that were launched in March.

Cisco officials are leveraging them to expand the reach of their UCS line of converged data center solutions, which the company first rolled out three years ago. The networking giant has since seen its UCS business grow rapidly, now reaching more than 11,000 customers and having an annual run rate of almost $1.3 billion. Cisco also has more than 2,000 channel partners selling the solution.

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The new systems come three months after Cisco launched UCS 3.0, which included new servers powered by the Xeon E5-2600 chips, expanded fabric capabilities and new integrated networking and virtualization features. The latest offerings complement what Cisco already has done with the solution, according to Todd Brannon, product marketing manager for unified computing at Cisco.

“These new servers round out the UCS portfolio with an even stronger set of products optimized for scale-out and light general-purpose computing as well as a new price/performance [four-socket] category in the mid-range,” Brannon said in a June 18 blog post.

In addition, the new Virtual Interface Card (VIC) will add capabilities to what Brannon said is an important part of the overall story around the UCS.

“One of the key differentiators of UCS is the way in which high-capacity server network access has been aggregated through Cisco Virtual Interface Cards and infused with built-in high-performance virtual networking capabilities,” he wrote. “In ‘pre-UCS’ server system architectures, one of the main design considerations was the type and quantity of physical network adapters required. … In UCS, I/O is effectively taken off the table as a design worry because every server gets its full USRDA [U.S. recommended daily allowance] of networking through the VIC: heaping portions of bandwidth, rich with Fabric Extender technology vitamins that yield hundreds of Ethernet and FC adapters through one physical device. Gone are the days of hemming and hawing over how many mezz card slots your blade has or how many cards you’re going to need to feed that hungry stack of VM’s on your rack server. This simplification changes things for the better because it takes a lot of complication out of the equation.”

Introducing the UCS in 2009 marked a significant change in direction for Cisco. The all-in-one data center solution not only was featuring Cisco’s networking technology, but also Cisco-branded servers, as well as storage capabilities from EMC and NetApp and virtualization from VMware. Cisco became a server vendor, putting it in direct competition with companies like Hewlett-Packard, which had been a strong partner.

It also helped dial up the competition in the converged data center market, sparking others like HP and IBM to grow their offerings. Earlier this month, Dell unveiled its Converged Blade Data Center, which combines Dell’s 12th Generation PowerEdge servers, new EqualLogic storage blade arrays and Force10 MXL blade switching.

For its new servers, Cisco is leveraging the work Intel is doing with processors, Cisco’s Bannon said. The new servers, which are aimed at such tasks as Web 2.0, big data and mainstream IT infrastructure, include the UCS B22 M3 blade and C22 M3 and C24 M3 rack systems, all powered by Intel Xeon E5-2400 processors.

In addition, Cisco is rolling out the B420 M3 blade system, which runs on Intel’s Xeon E5-4600 chips and is aimed at such workloads as virtualization and databases. The system supports 1.5 terabytes of memory and, with the new VIC1225 technology, offers up to 160G bps of I/O bandwidth.

“Intel has brought four socket server options, formerly the province of the mission-critical, ‘EX end of the spectrum, down into the mainstream,” Bannon wrote. “An example of this is our new UCS B420 blade. So if you want four socket core count and performance but don’t necessarily need the comprehensive RAS [reliability, availability, serviceability] features of an EX class system, you now have a price/performance optimized solution for that need.”

Intel introduced the Xeon E5-2400 and E5-4600 chips to ensure that the company is offering processor technology for a wide range of workloads, according to Boyd Davis, vice president and general manager of Intel’s Data Center Infrastructure Group.

“The data center’s a complicated place,” Davis said in an interview with Cisco taped during the Cisco Live conference. “Just delivering application performance isn’t enough. You have to deliver balance, and you really have to fit into the environments that customers are deploying today.”