cisco ccna 200-301 udemy

cisco ccna 200-301 udemy.Video 21.08A multimedia demonstration of using the sequence ACL feature is included in the companion digital resource to this book.Authentication Target 21.0421.4 Location of ACIThis section introduces the design issues associated with ACLs, i.e., given the type of ACL (standard or extended), where should it be located? In other words, given the source and destination addresses to be filtered, on which interface of which router should the ACL be activated?This section describes some important factors to consider when deciding where to place an ACL.First, do not go crazy with ACLs, creating dozens of ACLOs on each router If you do, testing and troubleshooting these filtering rules will be an almost impossible task. For example, in a campus network, ACLs should be configured on such Layer 3 switches or routers, that is, they are located at the distribution layer and connect buildings or floors to the campus backbone. This model, discussed in Chapter 13, contains a core layer, a distribution layer, and an access layer.Second, the number of statements contained in an ACL should be limited. ACLs that contain hundreds of statements are nearly impossible to test and troubleshoot. After years of accumulation, ACLs often contain a large number of unnecessarily repetitive statements.As for where to put ACLs, the following two rules apply in most cases.. Standard ACLs should be placed as close to the target device as possible .. Extended ACLs should be placed as close to the source device as possible.