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The server room scenario comprises a collection of high- and low-volume servers, three administrative PCs, and two printers The switch is connected directly to the network backbone via a router It has been determined that three of the servers, both printers, and two of the administrative PCs have fairly low bandwidth requirements and could be on the FastHub 424M 10/100 The remaining two servers and one administrative PC all have high requirements for bandwidth and will have to be on the 100 Mbps switch This places the low-bandwidth devices strategically on a shared media, while high-throughput devices reside on their own collision domain (off the switch) This scenario is illustrated in Figure 7-18

Once you ve made this connection, you need to use a terminal emulation program to talk to the router The two most popular programs are PuTTY (wwwchiark greenendorguk/~sgtatham/putty) and HyperTerminal (wwwhilgraevecom/htpe/ downloadhtml) Using these programs requires you to know a little about serial ports but these basic settings should get you connected: 9600 baud, 8 data bits, 1 stop bit, and no parity Every terminal emulator has some way for you to configure these settings Figure 8-41 shows these settings using PuTTY

d d d [ F ( s)] = [ f (t ) e st ] dt = f (t ) ( e st )dt = t f (t )e st dt ds ds ds

Figure 7-18: Using hubs in the server room environment One major benefit to this arrangement is the availability of additional network ports without much additional expense In dynamic environments, there is often need for additional ports; having some available lets you deploy additional servers quickly while additional dedicated switch ports are being acquired

NOTE A lot of initial router configuration harkens back to the methods used in the early days of networking, when massive mainframe computers were the computing platform available Researchers used dumb terminals machines that were little more than a keyboard, monitor, and network connection to connect to the mainframe and interact You connect to and configure many modern routers using software that enables your PC to pretend to be a dumb terminal These programs are called terminal emulators; the screen you type into is called a console Now it s time to connect Most Cisco products run Cisco IOS, Cisco s proprietary operating system If you want to configure Cisco routers you must learn IOS Learning IOS in detail is a massive job and outside the scope of this book No worries, Cisco provides a series of certifications to support those who wish to become Cisco People While CompTIA Network+ won t challenge you in terms of IOS, it s important to get a taste of how this amazing operating system works NOTE IOS used to stand for Internetwork Operating System, but it s just IOS now with a little trademark symbol

Summary

We can move the minus sign to the other side, that is:

Once you ve connected to the router and started a terminal emulator, you should see the initial router prompt, as shown in Figure 8-42 (If you plugged in and then started the router, you can actually watch the router boot up first)

In this chapter, we reviewed the fundamentals of repeater technology, Ethernet standards, and IEEE 8023 10BaseT and 100BaseT specifications In doing so, we highlighted the differences between Class I and Class II repeaters We learned about Cisco's FastHub Series of Class II repeaters, and covered the cabling specifications used when connecting to and cascading repeaters We took a closer look at cable specifications commonly used in today's networks, as well

Figure 8-42

(810)

The CompTIA Network+ certification exam expects you to know how to 11 Explain the function of common networking protocols: TCP/IP suite 41 Explain the function of each layer of the OSI model To achieve these goals, you must be able to Define the OSI seven-layer model Explain the major functions of network hardware Describe the functions of network software