CCNA FAQ: Advanced IP Access Control Lists Q1. Which of the following fields cannot be compared based on an extended IP ACL? (Choose two answers.) e. Protocol f. Source IP address g. Destination IP address h. TOS byte i. URL j. Filename for FTP transfers Explanation: E and F. Extended ACLs can look at the Layer 3 (IP) and Layer 4 (TCP, UDP) headers, and a few others, … [Read more...]