Book Image

CCNA Security 210-260 Certification Guide

By : Glen D. Singh, Michael Vinod, Vijay Anandh
Book Image

CCNA Security 210-260 Certification Guide

By: Glen D. Singh, Michael Vinod, Vijay Anandh

Overview of this book

With CCNA Security certification, a network professional can demonstrate the skills required to develop security infrastructure, recognize threats and vulnerabilities to networks, and mitigate security threats. The CCNA Security 210-260 Certification Guide will help you grasp the fundamentals of network security and prepare you for the Cisco CCNA Security Certification exam. You’ll begin by getting a grip on the fundamentals of network security and exploring the different tools available. Then, you’ll see how to securely manage your network devices by implementing the AAA framework and configuring different management plane protocols. Next, you’ll learn about security on the data link layer by implementing various security toolkits. You’ll be introduced to various firewall technologies and will understand how to configure a zone-based firewall on a Cisco IOS device. You’ll configure a site-to-site VPN on a Cisco device and get familiar with different types of VPNs and configurations. Finally, you’ll delve into the concepts of IPS and endpoint security to secure your organization’s network infrastructure. By the end of this book, you’ll be ready to take the CCNA Security Exam (210-260).
Table of Contents (19 chapters)

Firewall functions

Firewalls primarily have two functions:

  • Packet filtering
  • Network Address Translation

Most firewalls also perform two other important security services:

  • Encrypted authentication
  • Encrypted tunnels

Rules of a firewall

The rules of a firewall can be customized depending on our needs, requirements, and threat levels. There are different conditions on which firewall filters work. These are as follows:

  • IP address: The first condition on which a firewall rule works is on IP address. The decision is based on the range of IP addresses and subnet masks.
  • Domain name: The second condition on which a firewall works is on domain name. A firewall can be configured to permit or deny access to specified domain names...