UDP (User Datagram Protocol), 32
unauthorized connections, identification, 131
Universal Plug and Play Device Host, 214
updates, security and, 211–213
UPS (Uninterruptible Power Supply), power surges and, 229
USB (Universal Serial Bus), wireless adapters, 13–14
Usenet newsgroups, script kiddies and, 49
user group Web sites, 237–238
user sessions, session hijacking and, 59
usernames
SSID and, 190
wardriving protection and, 93