Network Security Fundamentals

This section covers the need for network security and the security objectives found with most organizations. This section also examines the different types of attacks that modern networks can experience.

Why do we need network security?

Network threats include internal and external threats. Internal threats are the most serious. These threats often occur because best practices are not followed. For example, blank or default passwords are used, or in-house developers use insecure programming practices.

External threats typically rely on technical methods to attack the network. The CCNA in Security focuses on combating these attacks using technical means. Firewalls, routers with access control lists (ACL), intrusion ...

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