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

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150 CHAPTER 9 Network Management ■ ■ ■ 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
Network Monitoring 151 C. Hardware devices D. Software applications 2. As the network manager for a small ISP in Maryland serving more than 2000 customers across the eastern United States, you are in charge of daily operations. Your regional supervisor just received a phone call from Corporate. He asks you over the phone to develop a calculated plan of action to guide decisions and achieve sound outcomes that provide guidelines that the installation contractors will use on how to access the closest data center which will be the location that is outfitted with the latest load balancing technology. What kind of document is your regional supervisor asking you to create A. Common management documentation B. CM documentation C. Procedure D. Policy 3. You want to control and optimize the network traffic entering your domain. What technique will assist your boss in increasing the usable bandwidth and lowering the latency A. Traffic shaping B. Load balancing C. High availability D. Jitter 4. You’re VoIP phone rings. You pick it up and say, “Hello” You listen very closely, but all you can hear is broken speech as if someone is talking very slowly but the words are not coming out right. You notice your VoIP switch is blinking red and you open up a command console to your VoIP switch to see why. Looks like there is a problem with your switch and it is not prioritizing your VoIP traffic above all else. What kind of service do you need to enable to ensure VoIP has the highest priority to ensure your VoIP packets are sent and received first A. QoS B. Dropped C. Delay D. Jitter 5. You are working for Google as an intern for the summer. You have always wondered how googling occurred on the back end of all those servers. You ask your supervisor what technique they use to distribute incoming traffic onto other servers when the traffic load became overbearing for one single server. What technique does your supervisor tell you that Google uses to allow for a group of computers in a cluster to share traffic load A. Traffic shaping B. Load balancing C. High availability D. Packet shaping
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