Sunday, 22 February 2015

Key questions to consider when evaluating hybrid cloud

This vendor-written tech primer has been edited by Network World to eliminate product promotion, but readers should note it will likely favor the submitter’s approach.

Hybrid cloud is the talk of IT, but to avoid costly, labor-intensive megaprojects you cannot escape, pay particular attention to minimizing implementation and management complexity. These questions will help you identify the best hybrid cloud architecture for your environment:

1. What are the top ways we will use our hybrid cloud in the next 12 to 18 months?

In the midmarket, the No. 1 answer is disaster recovery (DR). A secondary data center for DR is a luxury most companies can not afford. Now, public cloud services have put DR within reach of virtually all organizations. The key is to identify the enabling technology that minimizes complexity, maximizes automation and does not overtax the IT staff. Easy cloud DR solutions exist today for midsized shops; don’t be lead into a heavy professional services project.

For larger enterprises looking to utilize hybrid cloud to optimize and free up expensive data centers, hybrid clouds are attainable, manageable options. For example, organizations using VMware might want to leverage Hyper-V because they’re running so many Microsoft applications, while others want to leverage KVM for better flexibility, network outputs and drivers. For them, alternative hypervisors give them flexibility and significant cost savings. Public clouds, on the other hand, are a place where they can grow certain applications, conduct testing and development, and run non-critical applications. However, modern transformation technologies for cross-platform management are necessary to avoid monstrous and expensive system integration efforts.

2. Which public clouds do we want to leverage?

The public cloud space is continuously morphing, and that means there are many choices. End users may be quick to ask for the clouds they recognize: Amazon or maybe Azure. You, however, need to weigh all the factors, including price, scale, support and service.

There are public cloud self-service models offering attractive price points, but may not have the support staff if users have problems. On the other end of the spectrum, there are options delivering premium-level cloud and service packages – for a substantial price premium. You need to analyze which cloud providers are best by asking the questions, “What do I get for this?” “What do I want to manage?” and “How hands-on do I want to be?” From there, consider the best possible options for management and migration. The answer will most likely be a mix of on-premise solutions, cloud solutions and services. Of course, mixing and matching can add significant management complexity if you are not careful.

3. Which on-premise platforms do we want to use?

Certain applications may require huge virtual machines (VMs), and the technical staff might find that only certain hypervisors can handle the requirements. Maybe another application needs high I/O, which will lead to a different platform choice. Cost versus performance is always a factor. No matter the particulars, you need to think about flexibility combined with ease of use and the least possible disruption. Companies want to manage their hybrid environments in the same way they manage their current environments: They want a single, comprehensive management platform. You must be able to seamlessly migrate workloads between hypervisors and maintain consistent, compliant management. It is very doable today, and thus we see the meteoric rise in hybrid deployments.

4. How will we manage the hybrid environment?
You need to consider compute, network and storage together and ensure their hybrid management construct is capable of easily spanning a range of on- and off-premise platforms and resources – at a very granular level. To be operationally efficient, you need a single point of administration and management across the hybrid resource pool – a self-service portal alone will not be sufficient for day-to-day administration operations.

The ideal would be to have a hybrid management solution that is lightweight, thorough and cost-effective. When managing a hybrid configuration, you need to base these choices on individual requirements: Are they highly regulated? Who will be accessing the information? What is the information? And so on. Regardless of the answers, the best situation is to manage the hybrid cloud and on-premise workloads from a single point. Optimally, the hybrid resources would just work seamlessly with the existing management portfolio.

5. How will this integrate with our existing operations?

Most people inherently resist change. One of the biggest challenges comes from the people inside a company, especially (and rightly so) those who are responsible for delivering a certain grade of service – like IT staff. You have to be aware of this issue, and if adopting hybrid cloud means replacing familiar management consoles, retraining personnel and changing current workflows, employees will balk. Integration with existing operations is essential to successful deployments.

In addition, the hybrid project must scale. What works for a handful of technical people will not work when large scale production IT is involved and needs a very deliberate, orchestrated solution that is seamless with existing operations. Success of the project comes down to the ability to manage it. Integration with current tools and processes is key.

6. What skills will be needed to deploy, maintain and operate our hybrid environment?
IT staffers need to be able to analyze what they have today and what is needed tomorrow in terms of cost, performance, compliance and security, and then evaluate the choices. To do this, you need a strong working knowledge of both on- and off-premise management and integration. The hybrid cloud demands a shift in thinking. With on-premise infrastructure, IT teams had to do a lot of the physical underpinnings, such as hardware installation, wiring and networking, so those skill sets were heavily valued. The cloud takes away some of that and introduces a new application of those skill sets. Now, IT teams need to adapt their players and potentially hire new staffers with expertise in hybrid cloud functionalities, management, integration and administration.

7. How will we prevent vendor lock-in?

Before you ask this question, you should look around to see whether you’re already locked in and don’t realize it. Preventing lock-in requires vigilance against technical and financial constraints that could impede the very flexibility hybrid cloud is meant to create. Think about how lock-in occurs and make the hybrid choices that prevent it. For example, if you can seamlessly and easily move hybrid workloads between disparate platforms, that reduces lock-in. If you deploy a management solution that can span platforms, that also reduces lock-in. The other type of lock-in is long-term contracts. Vendors have endless incentives to contractually lock-in customers. With the speed of IT change and options, CIOs should be particularly wary of the multi-year enterprise license agreement (ELA).

Enterprises are well along the road to hybrid IT, but many are wary of getting stuck with hybrid cloud megaprojects. The best way to avoid that fate is to focus on flexibility, while leveraging current competencies and investments every step of the way. By minimizing complexity in the implementation stage and creating a flexible management environment that’s intuitive for the operations staff, you can steer clear of unsuccessful, costly and labor-intensive hybrid cloud deployments. With today’s hybrid technologies and solutions, no megaprojects are needed.

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Friday, 20 February 2015

600-501 Integrating Business Applications with Network Programmability (NPIBA)


QUESTION 1
Which option best describes explicit routing?

A. MPLS Traffic Engineering
B. destination-based routing
C. link-state routing
D. Shortest Path First
E. static routes

Answer: A

Explanation:


QUESTION 2
What is the purpose of Address Resolution Protocol in an IP data network?

A. Given a known MAC address, Address Resolution Protocol discovers the relevant IP address.
B. Given a known IP address, Address Resolution Protocol discovers the relevant MAC address.
C. Given a known URL, Address Resolution Protocol discovers the relevant IP address.
D. Given a known IP address, Address Resolution Protocol discovers the relevant URL.

Answer: B

Explanation:


QUESTION 3
Which factor limits the maximum number of IEEE 802.1Q VLANs to 4096?

A. the length of the VLAN ID field of the 802.1Q frame
B. the length of the Tag Protocol ID field of the 802.1Q frame
C. the size of the TCAM memory of the Layer 2 switch
D. the size of the VLAN table of the Layer 2 switch

Answer: A

Explanation:


QUESTION 4
Refer to the exhibit.



What is the correct way to summarize these different routes into a single route?

A. 10.0.0.0/8
B. 10.10.0.0/16
C. 10.10.0.0/22
D. 10.10.3.0/22
E. 10.10.1.0/22

Answer: C

Explanation:


QUESTION 5
What is the default administrative distance for a static route?

A. 0
B. 255
C. 1
D. 110
E. 254

Answer: C

Explanation:


Wednesday, 11 February 2015

98-366 Networking Fundamentals


QUESTION 1
You are employed as a network designer at ABC.com.
A ABC.com client has requested a network setup for his home office. The network has to be cost
effective, and easy to extend and implement. Furthermore, the client wants his workstations
connected by a single cable.
Which of the following network topologies should you use?

A. A star network topology.
B. A bus network topology.
C. A mesh network topology.
D. A ring network topology.

Answer: B


QUESTION 2
You are employed as a network designer at ABC.com.
You have recently designed a home office network for ABC.com that includes a switch.
Which of the following are TRUE with regards to network switches? (Choose all that apply.)

A. It keeps track of the MAC addresses attached to each of its ports and directs traffic intended for
a particular address only to the port to which it is attached.
B. It keeps track of the IP addresses attached to each of its ports and directs traffic intended for a
particular address only to the port to which it is attached.
C. It operates at the Physical layer of the OSI model.
D. It operates at the Data-Link layer of the OSI model.

Answer: A,D


QUESTION 3
You are employed as a network administrator at ABC.com. The ABC.com network consists of a
single domain named ABC.com.
As part of a training exercise, you have been asked to identify the layer that allows applications
and a number of user functions access to the network.
Which of the following options represents your response?

A. The document layer.
B. The application layer.
C. The system layer.
D. The Data-link layer.

Answer: B

Explanation:


QUESTION 4
You are employed as a network administrator at ABC.com. The ABC.com network consists of a
single domain named ABC.com.
You have been tasked with making sure that ABC.com’s network includes a server that converts
NetBIOS names to IP addresses.
Which of the following actions should you take?

A. You should consider adding a DHCP server to the ABC.com network.
B. You should consider adding a DNS server to the ABC.com network.
C. You should consider adding a Web server to the ABC.com network.
D. You should consider adding a WINS server to the ABC.com network.

Answer: D


QUESTION 5
You are employed as a network designer at ABC.com.
ABC.com’s network is made up of two network segments, named Subnet A and Subnet B. DHCP
clients are located on Subnet
A. A DHCP server, named ABC-SR07, is located on Subnet B.
You need to make sure that DHCP clients are able to connect to ABC-SR07.
Which of the following actions should you take?

A. You should make sure that the RRAS service is configured.
B. You should make sure that the Web service is configured.
C. You should make sure that the DNS service is configured.
D. You should make sure that the DHCP relay agent service is configured.

Answer: D

Explanation:


Tuesday, 3 February 2015

Windows 10: Inside Microsoft’s latest Technical Preview

The latest version, Build 9926, does not include some of the things that Microsoft showed off on Jan. 21, including deep integration of Skype into the OS, and the new Spartan web browser. But there are many important features in this build.

Technical Preview
On Jan. 21, Microsoft revealed many of the major features coming to Windows 10. Two days later, Microsoft released an updated Windows 10 Technical Preview. The Technical Previews have been made available to the public, but are meant only for testing purposes, and will not completely reflect what Windows 10 will be like in its final form. The latest version, Build 9926, does not include some of the things that Microsoft showed off on the 21st, including deep integration of Skype into the OS, and the new Spartan web browser. But there are many important features in this build. Here's a closer look.

Search Box
A search box now appears on the taskbar to the right of the Start Menu icon, which you can use to find files or programs stored on your computer/device or information on the web (via Bing). You can remove this box from the taskbar, or turn the search box into a shortcut icon of a circle. This search box is the interface through which you will interact with Microsoft’s personal digital assistant.

Cortana comes to Windows 10
The biggest new feature is Cortana. Microsoft plans to fully bake its personal digital assistant, which first appeared in Windows Phone 8.1, into the official release of Windows 10. During this testing phase, Cortana is not fully baked, and that's to be expected.

Setting up Cortana
Cortana resides inside the search box. You set it up by typing in your name or whatever you would like her to call you by.

Activating Cortana
You can set Cortana to activate whenever you say aloud to your computer's or device's mic "Hey Cortana." Doing this means Windows has to continually keep the mic on.

Cortana speaks
From there, you can ask Cortana to look up something, such as: "Hey Cortana, what is the current temperature?" A weather forecast will sprout from the search box, and a female voice (Cortana) will tell you the current temperature in your local area. She can also be asked to perform and answer basic calculations: "Hey Cortana, what is 6 times 7?"

Personal assistance
Inside the search box are three tools that let you add or remove what kind of information Cortana presents to you throughout your day: Notebook includes events from your personal calendar, local news, and traffic conditions. Reminders are notifications you set for Cortana to alert you about something on a specified day and/or time, or when you arrive at a location in the real world. With Places, you add location addresses that Cortana can reference regarding your personal travel activity.

Interface issues
In prior builds of the Technical Preview, the restored Start Menu interface looked similar to the one in Windows 7, but with the Windows 8/8.1 Start Screen sized down into a panel stuck to its right. This sounds clunky, but the overall result was actually manageable.Now, Build 9926 presents an interface where both halves of the Star Menu share a uniform look; it further blurs the distinction between which are your Windows desktop applications (which by default are listed in the left panel) and which are your Windows Store apps (by default on the right).

Resizing the Start Menu
In the older Technical Previews, you could resize the Start Menu by clicking-and-dragging on its top border. For some reason, Microsoft took away this feature, but added a full-screen mode, which is turned on by clicking the icon on the upper-right corner of the Start Menu. In full-screen, it doesn't look completely like the infamous Windows 8/8.1 Start Screen, though -- the left panel listing your desktop applications and Windows Store apps still remains. If you switch on "Tablet mode," the Start menu will expand to fill the screen when you click/tap the Start Menu icon. Tablet mode also locks out the user from accessing the desktop.

Switching off a live tile
Another thing that the Windows 10 developers removed from the Start Menu was the ability to switch a live tile off. Windows Store apps can be designed to show updated information, like your local weather, on their tile. Turning off such live-updating has been available since the original Windows 8 release, as a means to save bandwidth when necessary, so it's disconcerting to see this option eliminated from Build 9926. Hopefully, its absence is temporary due to testing purposes, and will return in future builds.

Design changes
Besides the more unified look of the Start Menu, there's not much new to see when it comes to eye candy. Some design changes for the system and user folder icons are seen under File Explorer. I think they look amateurish with a garish color palette, but maybe these won't be the final versions.

Action Center
The Action Center in the last Technical Preview build simply showed system status updates. In Build 9926, it now also includes shortcut icons to eight system settings.

Control Panel
Windows 10 could merge the PC Settings of Windows 8/8.1 and classic Control Panel into one. Build 9926 presents the first take at this. The Control Panel is still available, but some of its settings have been moved over to this new UI (including Windows Update). Clicking the System icon here...

Settings Menu
...takes you to a new version of the Windows 8/8.1 PC Settings menu.

Updated apps
And lastly, most of the Windows Store apps that come preinstalled on Windows 8/8.1 have been updated in Build 9926: Alarms, Calculator, Camera, Maps, OneNote, Pictures and Sound Recorder are among these. There's also a second version of the Windows Store, marked as a beta, which features a layout that's been designed to supposedly work better for desktop PC and notebook users of Windows 10.

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