Cisco Access-lists (ACL’s – Access Control Lists)

Posted Leave a commentPosted in Access-Lists, CCNA (ICND2), Networking 101, Security

Access-lists are the cornerstone of security in networking. They are used on Routers, Switches and Firewalls and are often a challenge to understand when first starting your career in networking. Before we dive into the configuration of access-lists, or otherwise known as ACL’s (Access Control Lists), it’s important to get an understanding of the concepts, […]

Wildcard Mask

Posted 2 CommentsPosted in Access-Lists, CCNA (ICND2), Routing

Before we can start to explain how routing protocols work, we need an understanding of wildcard masks.   The concept of wildcard mask is one that many people struggle with at first, but with a little time and practice it’s becomes second nature. Converting a full class subnet mask into a wildcard mask quite straight […]