Book Image

Implementing and Administering Cisco Solutions: 200-301 CCNA Exam Guide

By : Glen D. Singh
Book Image

Implementing and Administering Cisco Solutions: 200-301 CCNA Exam Guide

By: Glen D. Singh

Overview of this book

In the dynamic technology landscape, staying on top of the latest technology trends is a must, especially if you want to build a career in network administration. Achieving CCNA 200-301 certification will validate your knowledge of networking concepts, and this book will help you to do just that. This exam guide focuses on the fundamentals to help you gain a high-level understanding of networking, security, IP connectivity, IP services, programmability, and automation. Starting with the functions of various networking components, you’ll discover how they are used to build and improve an enterprise network. You’ll then delve into configuring networking devices using a command-line interface (CLI) to provide network access, services, security, connectivity, and management. The book covers important aspects of network engineering using a variety of hands-on labs and real-world scenarios that will help you gain essential practical skills. As you make progress, this CCNA certification study guide will help you get to grips with the solutions and technologies that you need to implement and administer a broad range of modern networks and IT infrastructures. By the end of this book, you’ll have gained the confidence to pass the Cisco CCNA 200-301 exam on the first attempt and be well-versed in a variety of network administration and security engineering solutions.
Table of Contents (26 chapters)
1
Section 1: Network Fundamentals
6
Section 2: Network Access
9
Section 3: IP Connectivity
12
Section 4: IP Services
15
Section 5: Security Fundamentals
20
Section 6: Automation and Programmability
22
Chapter 16: Mock Exam 1
23
Chapter 17: Mock Exam 2

Understanding VLANs

In a small LAN operating at optimal performance, there are typically a few devices exchanging messages simultaneously. As an organization grows to support more business services, so does a network to support more connected users and network applications. Physically, expanding a network seems simple, but we also need to consider the logical traffic flow and its capacity between devices. For us humans, we don't see the actual traffic flowing across a network without using tools such as Wireshark.

Important note

Wireshark is a network protocol analyzer that has the ability to display the raw details within a packet.

Let's imagine that within an organization, there are hundreds of devices all connected to the same physical network. If one device sends a broadcast (shouts on the network), all other connected devices will receive and process each broadcast message. What if a lot more devices are generating broadcast messages simultaneously? The high...