Intervju med Jerome Henry, en av IT världens skickligaste wireless instruktörer.
Exclusive Fast Lane Interview: Jerome Henry, CCIE Wireless & Wireless Instructor
We recently caught up with one of our top Wireless instructors, Jerome Henry, and found out that now is the best time to start working toward a Wireless certification. Here's what Jerome had to say:
1. So Jerome, I hear you just came back from a very important IEEE Plenary event on Wireless. What’s new?
Well there are 4 new IEEE protocol amendments emerging within the next 2 years that will mean big changes in the Wireless Enterprise; these will totally drive up the demand for advanced wireless professionals. I have summarized all of them on my recent blog.
2. Why is Professionalizing Wireless expertise extremely important?
Wireless is booming. Five years ago, a few advanced, enterprise-worthy wireless networks were deployed by skilled professionals with a long record of successful long range microwave link deployments. Then, most wireless networks were simple additions to an existing wired network, deployed by routing and switching professionals with little to no wireless experience. Today, access points are sold by the millions and wireless technologies account for billions of dollars in Cisco revenue. Wireless is already virtually everywhere and future protocols will bring wireless to even more locations. The range of possible features, the complexity of deployments and the greater security risks of wireless communications requires that those in charge of deploying these networks truly understand what they are doing. Wireless has become mission critical and default configurations are just not acceptable anymore. You have to know wireless technologies and Cisco’s wireless and borderless network solutions in detail. Potential employers or customers need to know that an engineer has the skills needed to successfully deploy or update wireless networks in complex environments. Getting a wireless certification is the best way to prove that an engineer has these skills. Getting trained by an Authorized provider like Fast Lane ensures you will have not only the knowledge, but the practical skills required to pass the certification exams and to deploy these important technologies.
3. What has changed about the CCIE Wireless 2.0 Exam?
The exam has been refreshed to integrate the latest code and features. It also has a slightly different format:
* There are no more open-ended questions! There used to be 4 open-ended questions presented to the candidate before the configuration part of the exam and they were quite difficult. They were often seen as unfair, because the answer had to be long enough to convince the proctor that you knew your stuff, but short enough to convince the proctor that you were not covering your lack of knowledge with long, complicated answers. Missing more than one of these questions meant failing the CCIE lab, even if the configuration part was perfect.
* To replace the open-ended questions, Cisco has added a trouble shooting section. Several devices are mis-configured, and you must fixthe issues. You need to be familiar enough with real life deployments to identify and fix these issues without wasting valuable time.
* The exam now runs the new Unified Wireless Controller and WCS code (7.0 instead of 4.2). Many new features are potential topics for the exam, including: > Office Extend AP, rocksolid Telecommuter service > Link encryption (APs to Cont) for higher security demands > VideoStream: Optimal video traffic over Wireless; ability to optimize based on specific video protocols > NAC integration, to integrate wireless into the enterprise security scheme
* Several of these items present new challenges. For example, NAC is a complex security product, and integrating NAC into the wireless solution requires security skills, on top of wireless skills. Some wireless devices are also more challenging. For example, the MSE can be used for context aware services or security, and you will face many new configuration possibilities. Learning them all is not difficult. Choosing the right option (and only that one option) that answers requirements presented in layman’s terms in the exam book is really challenging.
Do you believe the new blueprint adds value to the CCIE Wireless Certification?
* Updating the CCIE W exam to the latest code adds a great value to the exam. For the first time, the entire Cisco curriculum relies on the same code, which is the code supported by TAC and commonly deployed in new networks. With this update, wireless CCIEs are not only Cisco code experts, but also real life deployment experts.
4. What is happening today in Wireless that Enterprises really need to consider?
Adoption of 802.11n requires a topology change. To maximize the value of an 11n network, many thought that just replacing the a/g APs and controllers with 11n was enough, but this is not the case. For example, new bottlenecks are created due to the increased speeds, and therefore a new network design is often required. The new CUWSS (Conducting Cisco Unified Wireless Site Survey Version 2.0) and IUWVN (Implementing Cisco Unified Wireless Voice Networks Version 2.0) courses really focus on how to transition from an 802.11a or g network to an 11n network.
5. What are the risks of untrained, uncertified network engineers and administrators designing, implementing and administering wireless networks?
The new Cisco wireless LAN controller configuration guide contains more than 2400 entries. The days where the default controller and AP configuration would fulfill most requirements are long gone. Thinking that you can design or deploy a wireless network without training today is as risky as thinking that you can drive in the Indy 500 because you can drive a car. Without proper training, deploying a wireless network will result in something that seems to work, but it will cost more than it should, and will result in unhappy users. Today, users bring all sorts of devices to the network, and expect them to connect and provide the same level of quality as their wired counterpart. This means that wireless networks must be thoughtful and designed professionally.