If you are on the lookout for a book that is easy to read, without the extra technical details that few people can understand and covers a wide range of topics related to protocols, firewalls, general security and content switching, then this is your book.
The authors approach to each topic covered is simple and straight forward. The 10 chapters in total, prove adequate to leave you with a satisfying result and will ensure you get the most out of what it has to offer.
The order in which the chapters are analyzed is also very clever, starting from basic concepts, protocols in the lower layers of the OSI model, and then moving to the higher application layer protocols, routing, load balancing, security and finally VPNs and firewalls.
On specific chapters I read thoroughly, I wasn't able to detect any errors or incorrect information, which shows that there was obviously a lot of research done in order to produce this fine title.
This book is recommended for people who want a general overview of the subjects covered, with a hint of techinical details at certain points.