This chapter covers the following exam topics:
4.0 Infrastructure Services
4.6 Configure, verify, and troubleshoot IPv4 standard numbered and named access list for routed interfaces
Almost every other topic in the scope of CCENT and CCNA R&S focuses on achieving a core goal of any TCP/IP network: delivering IPv4 packets from the source host to the destination host. This chapter, along with the next chapter, focuses instead on preventing some of those packets from being allowed to reach their destinations, by using IPv4 access control lists (ACL).
IPv4 ACLs have many uses, but the CCENT and CCNA R&S certifications focus on their most commonly known use: as packet filters. You want hosts in one subnet ...