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
Cisco routers use IPv4 access control lists (ACL) for many different applications: to match packets to make filtering decisions, to match packets for Network Address Translation (NAT), to match packets to make quality of service (QoS) decisions, and for several other reasons.
IPv4 ACLs are either standard or extended ACLs, with standard ACLs matching only the source IP address, and extended matching a variety of packet header fields. At the same time, IP ACLs are either numbered or named. Figure 26-1 shows the categories, ...