Ccna 3 and 4: Companion Guide : Cisco Networking Academy Program

this item is great for a cheep ccna study giude

Excellent book, clear language for beginers and very detailed! Recommended!

This is good book to study CCNA Sem 3 and 4 but if you could grab other books or read the WEB forums they might give you more Details on some Topics

good

It is a new book and also has the CD with it. An excellent book.

The guides were a great learning experience to me with a lot of practically useful well explained details. The following comment I sent a few times to Cisco Press - they invite you to do so at the beginning of the book - to which I never ever got a reply which is a bit disappointing for a publisher of such great books. Users who study these books may check if my findings are right. ;-)When studying the guides I came across a section which I think does not accurately describe what is being tried to explain. It concerns the text on page 252 till the section 'Verifying the Initial Configuration of a Catalyst Switch'. Below I will try to explain what I mean by referring to the text in the book and then giving my comments between square brackets.The first line on the page I think describes what is being explained in the following paragraphs:'Switching tables can have more than one MAC address mapped to a particular port'.In the fourth paragraph I think lines 2, 3 and 4 are not accurate. 'The data frame is forwarded to Switch B on Port 2 [in the last line of the previous (3rd) paragraph a Port is referred to alphabetically - Port A. I would prefer consistency here]. Switch 2 [with Switch 2 I think Switch B is meant. Please see my previous comment on Port 2 / Port A] looks up the switching table and recognizes the destination MAC address. It [I presume Switch B is meant here] sends the frame to Host F, with MAC address F, via Port 4. [the latter implies that Host F is connected to Port 4 on Switch B. This is important to remember for the following paragraphs. As far as I'm aware it is still not known with which Port on Switch B the connection is made with Switch A]When Host F replies to Host A, the procedure is reversed. Host A [I think Switch A is meant here] can now update the switching table by mapping Host F to Port 4 [I think that for Switch A data traffic destined for Host F which resides on Switch B, should go to Port 2 because this is the port on Switch A to which Switch B is connected]. Switch 2 [or Switch B] can now update the switching table by mapping Host A to Port 2. [this implies that Switch A is connected to Switch B at Port 2 of Switch B. Following the sequence of the data traffic I think that first Switch B can update its switching table after receiving a data frame from Host A on the port which connects Switch B with Switch A. Secondly after Host F replies [then indeed the procedure is reversed) Switch A can update its switching table with the information that data frames for Host F should go to Port 2 of Switch A].Eventually, Switch A will learn that Host D, Host E and Host F are mapped to Port 4. [this contradicts with the 4th paragraph where it is indicated that the data frame (for Host F) is forwarded to Switch B on port 2 (of Switch A) and Switch B will learn that Host A, Host B and Host C are mapped to Port 2. [if my conclusion at the end of the previous paragraph is correct then this is correct].Summarised:1) Port and Switch indication are not consistent A and 1, B and 2 are confused.2) Port numbers are not accurately used. My understanding of 'Switching tables can have more than one MAC address mapped to a particular port' is as follows. When Switch A and Switch B are connected with each other via Port 2 (Switch A) and Port 3 (Switch B) then data frames sent from Hosts connected to Switch A to Hosts connected to Switch B will be forwarded to Switch B via Port 2 of Switch A. Data frames sent from Hosts connected to Switch B destined for Hosts connected to Switch A will be forwarded to Switch A via port 3 of Switch B.

Not only am I a Cisco Networking Academy Instructor, I am one of the official reviewers as listed inside this book. I spent almost a year working with the authors to make sure this book was error free, and full of realistic lab exercises. My students have used this book successfully for over 4 years.I truly believe that this book is one of the best resources you can use for your CCNP studies.

Clear and concise. I couldn't have completed program without it.

Don't be put off by the title, this is a very good book that guides you in the right direction, but if you are part of a cisco networking acadamy program and have access to the online curriculum then you will notice that the content of this book differs a great deal, why you ask? The book itself hasn't been proof read against the online curriculum, the book covers alot of information that is aimed more so to the CCNP qualification.Cisco are actually bringing out a 3.1 version of the companion guide in April, so I would wait until that comes out if you wish to just concentrate your studies on getting the CCNA but if you are looking to progress in to the CCNP then this book will certainly give you a bit of a headstart.

Sehr schönes Buch, das kann man durchaus jemandem empfehlen, der sich natürlich auch die Zeit nimmt, dieses Buch zu lesen und zu verstehen.

Easy reading and good to understand

Cisco is offering the CCNA (Cisco Certified Network Associate Program) professional qualification and therefore they have published the appropriate companions for their on-line curriculum.CCNA 3 and 4: Companion Guide is a useful companion that has helped me a lot during semesters 3 and 4, as has CCNA 1 and 2: Companion Guide also done, since I am a CCNA student at the moment. The book is well written, in an easy-to-understand way and they try to make things as easy and understandable as they can be.But, there are huge differences between the book and the on-line curriculum and that shows the poor effort from Cisco in devising the whole new version 3 of the CCNA. The book introduces during semester 3 concepts that will be taugth in semester 4 and this goes on!!!I am not at all dissapointed that I bought the book, but I am a bit dissapointed in Cisco! They could do a better job. After all, they want to call themselves leaders, right???Buy the book and try no to pay too much attention to some stuff that you will immediately recognise as "alien"...

Could not of passed the ccna without this