In general, the operating system in electronic devices serves to provide hardware functionality. By contrast, network devices use the Network Operating System (NOS). From that, regardless of whether it is a manageable or unmanageable networking device, it definitely has a NOS. Since this book aims to prepare you for the Cisco CCENT certification exam, it naturally discusses Cisco networking devices, including switches and routers. Both devices support the Cisco Internetwork Operating System (IOS) which, rewrite, is a NOS that is used by all manageable Cisco devices. The CCENT exam objectives require that a network administrator must have knowledge and skills to configure the Cisco IOS on Cisco switches and routers. At the same time, while their configuration poses a challenge, it's also fun. With that said, this section describes how to run basic...
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