These modules usually add interfaces to the router.Ĭisco provides a wide range of switches under its Catalyst brand.
Some routers have slots where additional modules can be added. More on connecting to the router is discussed shortly. This port used to connect to the router to configure, monitor and troubleshoot. Some of these are discussed later in the book while most of beyond the scope of CCNA.
CISCO 2900 RIGHT TO USE LICENSE SERIAL
Apart from Fastethernet interfaces, a router can have serial interfaces (for WAN connection), an ADSL interface and many other interfaces. Most of them have slots which allows you to add a module containing more interfaces. Different routers have different number of interfaces. These are FastEthernet interfaces used to connect the router to the network. Table 3-1 Rear components of the router Backplane component The only difference that you need to be aware of is the output difference in memory, interface type (Ethernet or FastEthernet) and number of interfacesįigure 3-1 Rear view of a Cisco1800 Series ISRįigure 3-2 Front of a Cisco1800 Series ISR Every command and concept discussed in this book holds true for all of these routers. You can practice using a 2500 or 2600 router or even a 3800 series ISR router. Figure 3-2 shows the front panel of the router.Įxam Alert: CCNA is not a device specific exam. Figure 3-1 shows a part of the backplane of a Cisco 1841 router with important parts labeled. 25 routers are End-of-Life now and cannot be bought from Cisco anymore. The earlier CCNA exams used to focus on Cisco 25 routers that have been replaced by ISR 18/2900 series routers. Cisco’s ISR series routers are example of routers that provide various services. Some of them just do routing whereas others provide some other functions such as Wireless connectivity, Security features and Voice-over-IP services.
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This chapter looks at the boot process, connectivity options, ways to configure the devices and show basic configuration and verification commands.Ĭisco provides various series and models of routers geared towards different types of customer and requirements. Cisco IOS is a proprietary operating system that Cisco routers and switches run on. This chapter is dedicated to Cisco Internetwork Operating System (IOS). So before moving to the various functions, it is necessary to know what makes them tick. The rest of the book focuses on various functions of Cisco routers and switches. You are aware of various layers of the OSI and TCP/IP models and the devices that work on these layers, especially routers and switches. The previous two chapters helped you learn the basics of networking.
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