CCNP Routing Exam Certification Guide by Clare Gough

By Clare Gough

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The following are three symptoms of network congestion: • • • NOTE Applications time out. Clients cannot connect to network resources. Network death results. Packets are randomly dropped only if there is not quality of service (QoS) configured within the network. book Page 38 Thursday, December 21, 2000 6:22 PM 38 Chapter 2: Managing Scalable Network Growth Applications Time Out The session layer of the OSI model is responsible for maintaining the communication flow between the two end devices.

In addition, Cisco believes that its official training is the best way to teach people about its products, so Cisco wants you to take the classes. book Page 20 Thursday, December 21, 2000 6:22 PM 20 Chapter 1: Cisco Certifications, the Routing Exam, and This Book’s Features If you are not taking the course, there is no reason to worry! However, truthfully, you will need more than just this book to prepare. Cisco Press publishes the Building Scalable Cisco Networks coursebook (ISBN 1-57870-228-3), which is a book version of the BSCN course.

Frustration sets in and often leads the user to reboot or to repeat keystrokes. This response is the same one that might cause you to raise your voice to someone who does not answer your question; you assume that the person hasn’t heard the question. book Page 32 Thursday, December 21, 2000 6:22 PM 32 Chapter 2: Managing Scalable Network Growth however, repeating keystrokes generates more network traffic, which increases congestion and delays. Avoiding this is essential for network health. To do so, build in mechanisms to alleviate congestion and to prioritize certain protocols that are more sensitive to delay.

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