Members of the House of Representative sought details, on Thursday, of a $30 billion plan to secure federal government systems and upgrade network defenses to ward off attacks from foreign nations and online criminals. Known as the Cyber Initiative, the Bush Administration project would dramatically reduce the number of interconnections between federal government networks and the Internet and put more advanced network security in place to monitor data traffic for signs of malicious attacks. While the 5- to 7-year project could dramatically improve the network defenses of government agencies, law makers questioned whether the initiative will be too little, too late, and whether the resulting network monitoring could undermine privacy.