San Diego, Calif. (Mar. 10, 2009) Information Systems Technician 2nd Class Ryan Allshouse uses the Intrusion Detection System (IDS) to monitor unclassified network activity from the Automated Data Processing (ADP ) workspaces on board the aircraft carrier USS Ronald Reagan (CVN 76). IDS is part of the Integrated Shipboard Network System (ISNS) and serves as an important Computer Network Defense (CND) enabler protecting the unclassified shipboard network from cyber attack. (U.S. Navy photo by Rick Naystatt)