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ccna cisco test.all packets, and this statement rejects all traffic. Because of the presence of this statement, the ACL should be filled toChapter 9 ACLs .115 . At least one Permit statement should be included. otherwise the ACL will block all traffic.2. outbound ACLsThe outbound ACL works as shown in Figure 9.1(b) Before the packet is forwarded to the outbound interface, the router checks the routing table to see if the packet can be routed. If the packet is not routable, it is discarded. If the packet is routable, the router checks to see if the outbound interface is configured with an ACL. if the outbound interface is not configured with an ACL, then the packet can be sent directly to the outbound interface. If the outgoing interface is configured with an ACL, the packet can be sent directly to the outgoing interface only after matching the ACL statement associated with the outgoing interface.data packets before they can be sent to the outbound interface. Depending on the result of the ACL match, it is decided whether the packet is allowed or denied. Figure 9-1 How ACLs Work9.1.3 Standard IPv4ACLs and Extended IPv4ACLsIPV4ACLs can be divided into standard IPV4ACLs and extended IPv4 ACLs according to the different parameters of the packets inspected by IPV4ACLs.1. Standard IPV4ACLThe standard IPv4ACL is relatively simple, allowing or denying traffic according to the source IPv4 address, with the number range of 1.99 or 1300. 1999, 799 in total.2. Extended IPV4ACL