CCNP CIT Exam Certiﬁcation Guide, Second Edition is a complete study tool for the CCNP CIT
exam, allowing you to assess your knowledge, identify areas to concentrate your study, and master
key concepts to help you succeed on the exam and in your daily job. The book is ﬁlled with features
that help you master the skills necessary to troubleshoot suboptimal performance in a converged
network environment. This book was developed in cooperation with the Cisco Internet Learning
This Study Guide is targeted specifically at people who wish to take the Cisco CCNP 640-606 – Support
(CIT) exam. This information in this Study Guide is specific to the exam. It is not a complete reference work.
Although our Study Guides are aimed at new comers to the world of IT, the concepts dealt with in this Study
Guide are complex and require an understanding of material provided for the Cisco Certified Network
Associate (CCNA) exam 640-607. Knowledge of CompTIA’s A+ course would also be advantageous but is
not a requirement....
The simplest way to verify OSI Layer 3 connectivity between two routers is to
use the Internet Control Message Protocol (ICMP). ICMP defines a number of
message types in RFC 792 for IPv4 and RFC 4443 for IPv6. (For copies, go to
ICMP defines procedures for echo (ping), traceroute, and source notification of
unreachable networks. Pinging an IP address can result in a variety of ICMP
messages, but the only message indicating that a ping is successful is the
ICMP echo reply message indicated by an exclamation point (!) in the output of
the ping command....
is a Cisco Certified Internetworking Engineer(CCIE #2893) and was a Cisco Certified Systems
Instructor for the ICRC, ACRC, CIT, CLSC, and CID courses. She holds a master's degree in education and a master's
degree in information systems. Over the last 15 years, she has developed and taught a variety of networking and
internetworking courses throughout the world for Digital Equipment Co. and various Cisco training partners. She
moved from England in 1991 and now lives in San Francisco with her family....