comptia network certification study guide pdf

... across the network. When data loops endlessly around the network in this way, it eats up the available bandwidth and can affect network performance. Not only can computers on the network experience ... DAMAGE AND DEFENSE Switching on Networks In terms of devices that provide network connectivity, switches have become the future of networking. Today’s computer networks have to support the combination ... and 5. now wants you to connect the two networks together. Your com- pany’s existing network is twice the size of the new network. To get these two networks connected together, which of the

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... OSI MODEL 237 THE DOD NETWORKING MODEL 257 NETWORKING PROTOCOLS 265 INTRODUCTION To prepare for the CompTIA Network exam, you should begin by reviewing the foundations of networking. Among these, ... 5: Wireless Networking 228 Many wireless networks that use the same frequency within a  small space can easily cause network disruptions and even denial of service (DoS) for valid network users. ... Exploits of Wireless Networks Examining the common threats to both wired and wireless  networks provides a solid understanding in the basics of security principles and allows the network administrator

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... this for the Network+ exam. Private Network Addresses 325  Renumbering If using NAT, no readdressing of privately addressed networks is necessary to access public networks.  Networks Treating ... applications in its network, but is not connecting its network to the global Internet, the IP addresses used do not have to be globally unique. A network of this type is called a private network, and ... organization. Only networks that interface with public networks such as the Internet need public addresses. Using pub- lic addresses on the outside and private addresses for inside networks is very

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... new routers or network links are added to a network, is a routing loop, which occurs in this fashion: A source computer on Network A is trying to reach a destination 1 computer on Network C The ... receiving computer As you’ve worked through this guide, you’ve learned that routing takes place at the network layer, and routing is all about recognizing network and host IP addresses and mapping ... similar to the tasks given to the network layer within the OSI model Protocols that exist at the network later are responsible for finding a path through a network to the destination computer

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... change What types of networks are most likely to use OSPF instead of RIP? Q: Large enterprise networks and very large internetworks, A: such as corporate campuses and global networks Microsoft ... the physical cabling and network devices that connect you to the network Troubleshooting often begins at the physical layer, where you ■ ■ need to determine if your network cards, hubs, and ... possibility of loops on a switched or bridged network Troubleshooting the Network layer A great deal of your troubleshooting time will be spent at the ■ ■ network layer, as this actually controls

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... Subnetwork of a Metropolitan Area Network 802.6k Distributed Queue Dual Subnetwork of a MAN. Supplement for MAC bridging 802.6l Point-to-Point Interface for Subnetwork of MAN. Specification for network ... Computer Network local-network protocols RFC894 Standard for the transmission of IP datagrams over Ethernet networks RFC895 Standard for the transmission of IP datagrams over experimental Ethernet networks ... the network from interfering with one another when trying to transmit; if they do, a collision occurs. To reduce collisions, CSMA/CD devices listen to the network before transmitting. If the network

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... dissimilar networks so that both are able to communicate For example, if your Ethernet network is to be connected to a Token Ring network, you will need to have a gateway so that hosts in the two networks ... a legitimate solution As a network technician, you are asked to deploy a network load 11 balancer You need to configure a network load balancer on the 10.0.10.0/8 network for the Web development ... of a small business network You notice 14 that as you add workstations to the network over time the speed of the network decreases, what devices would you replace in your network with what other

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... Sarbanes-Oxley Act of 2002 As an organization that has computer networks and recognizes information security as an important role in how to develop your networks, you must be aware of ISO/IEC 27002:2005 Regulations ... Wiring schematics, physical/logical network diagrams, baselines, policies, procedures, configurations, and regulations B Wiring schematics, physical/logical network diagrams, load bal-ancing, ... engines C Wiring schematics, technical network diagrams, baselines, poli-cies, procedures, configurations, and regulations D Building schematics, physical/logical network diagrams, base-lines, policies,

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... Trang 2CompTIA Network+ Certification Study Guide Trang 3This page intentionally left blankTrang 4CompTIA Network+ Certification Study Guide Exam N10-004 2E Robert J Shimonski ... Data CompTIA Network+ certification study guide / Robert J Shimonski [et al.] — 2nd ed p cm Includes index ISBN 978-1-59749-429-8 (pbk : alk paper) 1 Computer networks—Examinations—Study guides ... Syngress Publishing, Inc Elsevier, Inc 30 Corporate Drive Burlington, MA 01803 CompTIA Network+ Certification Study Guide Copyright © 2009 by Elsevier, Inc All rights reserved Printed in the United

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... external transceiver type Trang 2On networks that used 10Base2 and 10Base5 media, transceivers are used to connect to the cable and communicate with the network 10Base5 networks use a device called ... allows the workstation to connect to the network using an AUI cable When a MAU and AUI cable are used on a 10Base5 network, the onboard trans-ceiver of the network card isn’t used Instead, the transtrans-ceiver ... through the AUI cable from the network adapter card on the workstation On 10Base2 networks, no more than 30 transceiv-ers can be connected to any segment, while on 10Base5 networks no more than 100

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... CHAPTER 3: Network Devices 126 Firewalls A firewall protects a secure internal network from a public insecure network. Firewalls are devices or software that ... the next level by further isolating the internal network from the public network. An addi- tional screening router is placed between the internal network and the fire- wall proxy server. The internal ... In addition, the internal network is protected by a firewall from both the external network and the systems in the DMZ. FIGURE 3.9 A Layered DMZ Implementation. Network Devices 131 Because

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... allows the network architects to reuse networking equipment as required to address the networking realities of each environment For example, it is possible to move part or all of a network from ... secure from daily activities Roaming A wireless network access zone is an area of wireless network coverage Compared to traditional wire-based networks, a wireless user is not required to be ... 5: Wireless Networking 174 When discussing physical roaming, we would include both the movement of a user within a single AP’s wireless network access zone or within the combined network access

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... understood to pass the wireless objectives on the Network certification exam overview of wireless Communication in a wireless Network Wireless networks, like their wired counterparts, rely on ... Protocol (WAP) networks and wireless local area network (WLAN) based on the Institute of Electrical and Electronic Engineers (IEEE) 802.11 speci-fication These are not the only wireless networking ... in the link wIrElESS NETworK CoNCEpTS This section covers some of the most popular wireless technologies used today for wireless networking In the past 5 years, two wireless network technologies

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... wireless network to sniff and capture network traffic. This network traffic can reveal a lot of informa- tion about the network and the company that uses it. For example, looking at the network ... avenues into a wireless network. The first step in attacking a wireless network involves finding a network to attack. The most popular software developed to identify wireless networks was NetStumbler ... any of the aforementioned network sniffing tools, an attacker can easily monitor the unencrypted network. Figure 5.13 shows a network sniff of the traffic on a wireless network. From this session,

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... one of the network sniffers to monitor for network activity Although not as efficient as NetStumbler, it is still a functional way to discover and monitor networks Even encrypted networks show ... wireless AP and several network cards for his home network When he gets home to his apartment and configures his network, he is extremely happy with how well wireless networking actu-ally works ... Protocol (FTP) To protect a network from being discovered with NetStumbler, it is impor-tant to turn off any network identification broadcasts and, if possible, close down the network to any unauthorized

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... network technician and to pass the CompTIA Network+ exam. We cover network models such as centralized and decentralized, the differences between a local area network (LAN) and a wide area network ... technical editor for Security+ Study Guide and DVD Training System, (ISBN: 978-1-931836-72-2, Syngress), lead author and technical editor for Network+ Study Guide & Practice Exams: Exam ... common source for networking professionals to get the definitive source on networking knowledge. So let us start from the very beginning, what exactly is a network anyway? WHAT IS A NETWORK? Even...

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... using it. Network Monitors and Protocol Analyzers Network monitors and protocol analyzers monitor traffic on the network and display the packets that have been transmitted across the network. ... transmitted across the network, the problem may lie with that particular packet type. Because the network moni- tor enables you to view the contents of all packets on the network, in many cases, ... cabling. Troubleshooting Experienced network administrators know that cabling is one of the most common causes of network failure. For this reason, you should check cabling early in the network troubleshooting...

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... 125–136 Network diagrams logical, 487 physical, 485–487 Network documentation, 561, 565 Network driver interface specification (NDIS) boundary layer, 255 Network fundamentals history on networking ... communications, 5–14 logical networking topologies, 14–24 network types, 31–35 physical network models, 24–30 Network hijacking and modification, 213–214 protecting, 215 Network IDs, 299–305 class ... 302 Network intrusion detection system (NIDS) network design with, 389–392 vs. NIPS, 388–389 Network intrusion protection system (NIPS) network design with, 389–392 vs. NIDS, 388–389 Network...

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... popularity as a network OS, it was widely used on corporate and government networks. Logical Networking Topologies 15 Network modeling is important for getting the first leg of network design ... decentralized? Centralized When a centralized network model is used, a network s resources are centrally located and administered. This approach allows network administrators to have better access ... over the network will take place. As we approach 2010, it’s interesting to look back on the last decade of networking … how it has evolved and where we will wind up next. LOGICAL NETWORKING...

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... things are, and how the network is configured. Although networks are often unique to one another, the topology of each network will share characteristics with one another. Networks will either ... the servers of years past, making peer-to-peer networks a viable solution for smaller networks. In a peer-to-peer network, computers on the network act as equals, with each workstation providing ... implemented so that users on remote networks cannot access the local network freely. Physical Networking Models 25 BUS Bus topologies are one of the most straightforward networks and are easy to set...

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