By Glen Clarke
The most sensible totally built-in learn method available
With countless numbers of perform questions and hands-on workouts, CompTIA community+ Certification learn advisor, Fourth Edition covers what you must know-and indicates you ways to prepare-for this difficult examination.
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Covers the entire examination subject matters, including:
Basic community suggestions * community Protocols and criteria * Networking parts * Subnetting and Routing * TCP/IP Utilities * instant Networking * distant Connectivity * vast zone community applied sciences * community Implementation * community upkeep and aid * community safeguard * community Troubleshooting
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Additional info for CompTIA Network plus Certification Study Guide
With a bus topology, when a computer sends out a signal, the signal travels the cable length in both directions from the sending computer. When the signal reaches the end of the cable length, it bounces back and returns in the direction it came from. This is known as signal bounce. Signal bounce is a problem, because if another signal is sent on the cable length at the same time, the two signals will collide and be destroyed and then must be retransmitted. For this reason, at each end of the cable there is a terminator.
Figure 1-1 A peer-to-peer network hub Workstation A Laser printer Workstation B Workstation C Identifying Characteristics of a Network 5 It is important to note that peer-to-peer networks are designed for fewer than 10 systems, and with Microsoft client operating systems such as Windows XP Professional, only 10 concurrent network connections to those clients are allowed. This means that if you have 15 or 20 employees, you eventually will need to implement a server-based network. Server-Based Networks A big disadvantage of peer-to-peer networking is that you can’t do your day-today administration in a single place.
Mesh Topologies A mesh topology is not very common in computer networking today, but you must understand the concept for the exam. In a mesh topology, every workstation has a connection to every other component of the network, as illustrated in Figure 1-8. Figure 1-8 Computers in a mesh topology are all connected to every other computer on the network. 14 Chapter 1: Basic Network Concepts Advantages of a Mesh Topology The biggest advantage of a mesh topology is fault tolerance, meaning that, if there is a break in a cable segment, traffic can be rerouted through a different pathway because there are multiple pathways to send data from one system to another.
CompTIA Network plus Certification Study Guide by Glen Clarke