Building Cisco Multilayer Switched Networks (BCMSN)
(Authorized Self-Study Guide)
Fourth Edition
Copyright © 2007 Cisco Systems, Inc.
ISBN-10: 1-58705-273-3
ISBN-13: 978-1-58705-273-6
Warning and Disclaimer
Every effort has been made to make this book as complete and as accurate as possible, but no warranty or fitness is implied. The information provided is on an "as is" basis. The author and the publisher shall have neither liability nor responsibility to any person or entity with respect to any loss or damages arising from the information contained in this book or from the use of the CD or programs accompanying it.
When reviewing corrections, always check the print number of your book. Corrections are made to printed books with each subsequent printing.
First Printing: Feburary 2007
Corrections for all Printings
Chapter 18: Page 823, first two paragraph
Reads:
Another popular option for smaller businesses might be a cable or DSL modem. Thissolution sometimes offers faster download speeds but slower upload speeds. Reliability isoften an issue. User are often forced to “share” connections with other nearby businesses,sometimes causing a sacrifice in speed.
Microwave is a solution for some sites where distance is short, reliability is not critical, andmoney is not an issue. With microwave, a U.S. Federal Communications Commission(FCC) license is required. The cost of the equipment is typically more than $10,000 per site,not including installation items. In heavy fog, rain, or snow, performance is questionable. Multipoint connections are usually not possible.
Should read:
Another popular option for smaller businesses might be a cable or DSL modem. Thissolution sometimes offers faster download speeds but slower upload speeds. Reliability isoften an issue. Cable users are often forced to “share” connections with other nearby businesses,sometimes causing a sacrifice in speed.
Microwave is a solution for some sites where distance is short, reliability is not critical, andmoney is not an issue. With licensedmicrowave, a U.S. Federal Communications Commission(FCC) license is required. The cost of the equipment is typically more than $10,000 per site,not including installation items. In heavy fog, rain, or snow, performance is questionable. Multipoint connections are usually not possible.
Chapter 18, Page 825 – Figure 18-12
The picture of absorbtion is wrong. Absorbtion is like a sponge, it sucks up RF signals. It does not pass through or reflect directly. It is important to change this figure.
Chapter 18, Pager 838, Table 18-3 The Gain column has the degree symbol when it should list dBi instead.
The Gain column should look like the following if space permits:
Gain
2–5 dBi
6–13 dBi
14–21dBi
Or, the column title could be changed by adding the “dBi” reference value to it. Located the “dBi above or below does not matter.
This errata sheet is intended to provide updated technical information. Spelling and grammar misprints are updated during the reprint process, but are not listed on this errata sheet.
Updated 08/14/2009