native datatypes, 10-13, 40-41, 88-93, 119, 130-134, 166-167
NetBSD, libdnet library and, 140
network addresses, 129
Network Associates Inc., 194
Descry sample program for, 303-326
libnids library and, 87-112
network security tools defined, 1-8
network time protocol (NTP), 45, 62-65
nmap fingerprinting tool, 114
no operation (NOP), 118
nonblocking mode, 17
NULL port scans, 225