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

Components of the routing table

To further understand how routers make their decisions when it comes to forwarding packets between networks, it's important to understand each component of the routing table within a Cisco IOS router. In this section, we will cover all the essential components that are part of the routing table, including:

  • Routing protocol codes
  • Prefix
  • Network mask
  • Next hop
  • Administrative distance (AD)
  • Metric
  • Gateway of last resort

Let's start with routing protocol codes.

Routing protocol codes

When you execute the show ip route command on a Cisco router, the very first thing you will see is a concise list of codes. These codes are formally referred to as routing protocol codes. Each code is used to help you identify how a route has been learned and added to the routing table.

The following snippet shows the routing protocol codes of a Cisco IOS router:

Figure 7.8 – Routing protocol...