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You're reading from  Implementing and Administering Cisco Solutions: 200-301 CCNA Exam Guide

Product typeBook
Published inNov 2020
PublisherPackt
ISBN-139781800208094
Edition1st Edition
Tools
Cisco UCS
Concepts
Network Security
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Author (1)
Glen D. Singh
Glen D. Singh
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Glen D. Singh

Glen D. Singh is a cybersecurity author, educator and SecOps professional. His areas of expertise are cybersecurity operations, offensive security tactics and techniques, and enterprise networking. He holds a Master of Science (MSc) in cybersecurity and many industry certifications from top awarding bodies such as EC-Council, Cisco, and Check Point. Glen loves teaching and mentoring others while sharing his wealth of knowledge and experience as an author. He has written many books, which focus on vulnerability discovery and exploitation, threat detection, intrusion analysis, incident response, network security, and enterprise networking. As an aspiring game changer, Glen is passionate about increasing cybersecurity awareness in his homeland, Trinidad and Tobago.
Read more about Glen D. Singh

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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...

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Implementing and Administering Cisco Solutions: 200-301 CCNA Exam Guide
Published in: Nov 2020Publisher: PacktISBN-13: 9781800208094
© 2020 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Glen D. Singh

Glen D. Singh is a cybersecurity author, educator and SecOps professional. His areas of expertise are cybersecurity operations, offensive security tactics and techniques, and enterprise networking. He holds a Master of Science (MSc) in cybersecurity and many industry certifications from top awarding bodies such as EC-Council, Cisco, and Check Point. Glen loves teaching and mentoring others while sharing his wealth of knowledge and experience as an author. He has written many books, which focus on vulnerability discovery and exploitation, threat detection, intrusion analysis, incident response, network security, and enterprise networking. As an aspiring game changer, Glen is passionate about increasing cybersecurity awareness in his homeland, Trinidad and Tobago.
Read more about Glen D. Singh

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