Product Description
Master all 642-845 exam topics with the official study guide Assess your knowledge with chapter-opening quizzes Review key concepts with foundation summaries Practice with hundreds of exam questions on the CD-ROM Amir Ranjbar, CCIE® No. 8669 CCNP ONT Official Exam Certification Guide is a best of breed Cisco® exam study guide that focuses specifically on the objectives for the Optimizing Converged Cisco Networks exam (642-845 ONT). Successfully pa… More >>
CCNP ONT Official Exam Certification Guide
Tags: ccnp, CD-ROM, certification, Cisco, cisco exam, cisco networks, Exam, exam questions, exam study guide, Guide, key concepts, Official
#1 by A. Sardella on February 4, 2010 - 10:32 pm
Queues baby. That’s what it’s all about. First of all, consider the VoIP scene. You ain’t getting no guaranteed action over that converged network unless you’re doing some low latency queuing (with is class based weighted fair queuing + a priority queue) and probably some compression on that real time protocol (RTP) header. Then there’s the fact that VoIP has to interact with the plain old telephone service (POTS) and the gateways, gatekeepers, FXO, FXS, earth and magneto trunks, all that needs to be adapting the packets to the analog signal domains. No way you’re getting by without it.
And then there’s the per-hop DiffServ with its many and varied ways of prioritizing. Software queues, hardware FIFOs. Shaping and policing, dropping and buffering, ingress and egress, oy it makes my head hurt. But you need to be aware of the tools. Alternatively, signal the whole thing with IntServ (RSVP) but don’t expect it to scale as well. The whole question of policy at the edge comes up again here, and while the conventional wisdom is don’t be breaking open packets in the core, the bottom line is that you don’t always want to send a guaranteed service into a cloud and hope for the best on the other side.
QoS knobs have been so many and varied over the years that it’s good there are finally some macro-based to set them up with templates. The modular QoS CLI and AutoQoS are two hopeful examples of simplifying the IT workday, and the Security and Device Manager (SDM) GUI is another nice try. Of course, a little tuning after the wizards have painted with their broad brush tends to help you get things right.
And let’s not make too many assumptions about wires. Who doesn’t have a laptop nowadays? And the wonderful things about standards is that there are so many of them, and that’s just counting the ones that begin with 802.11. Encryption, authentication, authorization, rogue access points….you can bet that security is the killer app for wireless.
And by the way, this book maps pretty nicely to the test, and if you understand it you have a very good shot at passing that bad boy.
Rating: 4 / 5
#2 by Sneaky Wombat on February 4, 2010 - 11:41 pm
This book is barely sufficient to be used as a single source to study from. If that’s what you’re looking for, you had better know some or most of the content already. If you’ll need a lot of detail and examples to pass the ONT test, this book should be considered along with another one. I passed the test using only this book, but it was tough.
Rating: 3 / 5
#3 by K. Blackman on February 5, 2010 - 1:38 am
Chalk it up to user preference but for an official publication, I think I needed a little more than this book for the exam. It’s a great reference work to use and to have beyond simply passing the exam. Covers most if not all areas of expertise required in supporting Cisco networks. More examination questions on the included CD would be nice along with exam simulations.
Rating: 3 / 5
#4 by Kenneth Ratliff on February 5, 2010 - 2:33 am
This is one of the few Exam Certification Guides I’d say is enough to pass with, if it’s the only thing you have to study with. It does a very good job of covering the exam. There are times (Chapter 7 in particular) where I wanted to strangle the author, as he kept repeating the same things. The book is very thin compared to the other CCNP Official Exam Cert guides, so there may have been some padding involved.
Regardless, the box is a good solid core. Combine it with some good test prep software like Transcender, and you should easily pass ONT
Rating: 4 / 5
#5 by Andrew G. Teslicko on February 5, 2010 - 3:42 am
This book is the only study material you will need to get you by with a passing score on the ONT exam. However, you will want to try to get your hands on the SDM which can be done with any newer router providing those flash files are installed. Pay attention to the print screens on the WLC and WLSE as you most likely will not be able to get your hands on those. The book is concise,(300 pp) to the point, slightly ardous, but all business. Probably the best choice for re-cert as the more recent CCNP course material is covered- most notably VOIP topology basics and Wireless Security strategies. Voip knowledge and experience seems to be increasingly in demand in the recent job markets.
Rating: 4 / 5