You're reading from Implementing and Administering Cisco Solutions: 200-301 CCNA Exam Guide Begin a successful career in networking with CCNA 200-301 certification

Product type Paperback

Published in Nov 2020

Publisher Packt

ISBN-13 9781800208094

Length 764 pages

Edition 1st Edition

Tools

Cisco

Concepts

Network Security

Author (1):

Glen D. Singh

View More author details

Table of Contents (26) Chapters

Preface

1. Section 1: Network Fundamentals

2. Chapter 1: Introduction to Networking FREE CHAPTER

3. Chapter 2: Getting Started with Cisco IOS Devices

4. Chapter 3: IP Addressing and Subnetting

5. Chapter 4: Detecting Physical Issues, Wireless Architectures, and Virtualization

6. Section 2: Network Access

7. Chapter 5: Implementing VLANs, Layer 2 Discovery Protocols, and EtherChannels

8. Chapter 6: Understanding and Configuring Spanning-Tree

9. Section 3: IP Connectivity

10. Chapter 7: Interpreting Routing Components

11. Chapter 8: Understanding First Hop Redundancy, Static and Dynamic Routing

12. Section 4: IP Services

13. Chapter 9: Configuring Network Address Translation (NAT)

14. Chapter 10: Implementing Network Services and IP Operations

15. Section 5: Security Fundamentals

16. Chapter 11: Exploring Network Security

17. Chapter 12: Configuring Device Access Control and VPNs

18. Chapter 13: Implementing Access Control Lists

19. Chapter 14: Implementing Layer 2 and Wireless Security

20. Section 6: Automation and Programmability

21. Chapter 15: Network Automation and Programmability Techniques

22. Chapter 16: Mock Exam 1

23. Chapter 17: Mock Exam 2

24. Assessments

25. Other Books You May Enjoy

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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...