... help limit network traffic and restrict network use by certain users or devices. For TCP/IP packet filtering, Cisco IOS has two types of access list, standard and extended. Here is a brief ... are used for: • Standard access list (1 to 99) check source IP address. • Extended access list (100 to 199) check source and destination IP, and specific protocols, TCP and UDP port numbers. ... 10/25-20:33:38.568567 Source Address and port (21) 63.78.46.199:21 Direction operator -> Destination address and port (21) my.net.109:21 Protocol and Time to Live (TTL) TCP TTL:26 ...