Abstract
The chapter describes Network Monitor, and explores how to use Network Monitor to view network traffic and identify information about the network traffic. Network Monitor is a great tool to help understand and troubleshoot connectivity problems. The chapter discusses the identification and resolution for Internet connectivity problems. It focuses on Network Address Translation (NAT), name resolution, and Internet Protocol (IP) addressing issues. Besides troubleshooting and monitoring regular network traffic, the chapter also focuses on monitoring network traffic that is encrypted. IP Security (IPSec) is based on open standards that are used to provide reliable transmission of encrypted data and authentication of data over IP. Network Monitor captures the frames of data as they are delivered over the wire, time stamps them, and provides the statistical data about those frames. After one has captured the frames of data, Network Monitor may decode the headers and provide an easy-to-read summary of the type of packet, the source, the destination, and if the data is not encrypted, the data in the packet as well.
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