Book Image

CCENT/CCNA: ICND1 100-105 Certification Guide

By : Bekim Dauti
Book Image

CCENT/CCNA: ICND1 100-105 Certification Guide

By: Bekim Dauti

Overview of this book

CCENT is the entry-level certification for those looking to venture into the networking world. This guide will help you stay up-to date with your networking skills. This book starts with the basics and will take you through everything essential to pass the certification exam. It extensively covers IPv4 and IPv6 addressing, IP data networks, switching and routing, network security, and much more—all in some detail. This guide will provide real-world examples with a bunch of hands-on labs to give you immense expertise in important networking tasks, with a practical approach. Each chapter consists of practice questions to help you take up a challenge from what you have procured. This book ends with mock tests with several examples to help you confidently pass the certification. This Certification Guide consists of everything you need to know in order to pass the ICND 1 100-105 Exam, thus obtaining a CCENT certification. However, practicing with real switches and routers or a switch or router simulator will help you succeed.
Table of Contents (18 chapters)
10
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Appendix G: Graphical Network Simulator-3 (GNS3)

Cisco Discovery Protocol and Link-Layer Discovery Protocol overview

It is apparent that both the Cisco Discovery Protocol (CDP) and Link Layer Discovery Protocol (LLDP) operate on OSI Layer 2 and have to do with discovering neighbor devices. However, CDP is a Cisco proprietary protocol, while LLDP is a vendor-neutral protocol. In addition, CDP is enabled by default on Cisco devices, where as LLDP is required to be enabled. This section describes how to configure both CDP and LLDP on Cisco switches.

Device discovery with CDP

Obviously, since it is developed by Cisco, CDP runs on all Cisco devices. CDP periodically sends advertisements out of all ports to connected devices. These advertisements contain information, such as the...