2.1 Physical Security: Security Guard and Door Locks 2. Security (220-1002), Comptia A+ (Plus), Comptia A+ (Plus) 220-1002 This entry is part 119 of 278 in the series Comptia A+ (Plus) 220-1002 Series Security guard You may have security guard employees that help to restrict access by checking identification of employees and guests. Door lock Author: Previous Article 2.1 Physical Security: Smart Card Next Article 2.1 Physical Security: Biometric Locks Latest Posts Storage Area Network (SAN) APM and ACPI Acceptable Use Policy