Syngress - Eleventh Hour Network+ Exam N10-004 Study Guide (11 ...

150 CHAPTER 9 Network Management
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■ Reducing unplanned downtime increases a business’s potential productivity.
Caching engines Cache is data that is copied from the original data and is
saved for computers to access locally instead of having to retrieve the same
data again from the source server.
■ Accessing cached data is quicker since it is stored in a temporary location
for a specific amount of time.
■ Cache engines are servers that are dedicated to caching data for clients.
■ If an item in cache is not used often enough, it is discarded until the client
requests it again.
■ Common implementations of cache engines will target Web server
content.
Fault tolerance Fault tolerance allows continued operations in the event of
a system or system component failure.
Summary
In this chapter, we discussed why networked information systems need to be
managed. If our goal in network management is to manage our networks so that
they don’t spiral out of control, we need to always remember the activities, techniques,
measures, and gear that pertain to how we operate, administer, maintain,
and condition networked information systems.
In this chapter, we covered three main exam objectives: network management,
CM, and network monitoring. In the network management section, we discussed
how to keep track of resources in the network. In the CM section, we discussed
why and how to establish documentation, how baselines can assist in network
troubleshooting, and why creating and implementing policies and regulations
are important. Finally, we addressed network monitoring, which included a brief
example of a few tools and how to use them to conduct network monitoring.
While discussing network monitoring, we studied on a few terms like QoS, traffic
shaping, load balancing, high availability, and fault tolerance. Each of these terms
areveryimportantinthenetworkmonitoringconstructbecauseeachoneisdirectly
related to all the rest in assisting with troubleshooting and network optimization.
Top Five Toughest Questions
1. You have just been hired by Aplura Inc., a global Internet service provider
(ISP), as their first junior network analyst. Bob, your supervisor was late
this morning, and before he picked up his daily cup of coffee he asks you
to begin troubleshooting the connectivity from your offices’ border router
to the border router in your remote office in Sydney, Australia. You find the
CM documentation but you are looking for the link speed of your router
to determine if it is correct. What piece of information is missing from this
document
A. Physical access methods
B. Service protocols