4.2. Segregation in Networks................................................................................................. 26 4.3. Security of Network Services ........................................................................................... 27 4.4. Electronic Messaging...................................................................................................... 27 5. Mobile Device Policy ............................................................................................................. 28 6. Information Transfer Policies and Procedures ........................................................................ 29 6.1. Agreements on Information Transfer............................................................................... 30 Part 4: Physical and Environmental Security........................................................................... 32 1. Purpose ............................................................................................................................... 32 2. Introduction......................................................................................................................... 32 3. Secure areas......................................................................................................................... 32 4. Physical security perimeter ................................................................................................... 33 5. Physical Entry Controls.......................................................................................................... 34 6. Securing Offices, Rooms and Facilities.................................................................................... 34 7. Server Rooms and Data Center Security ................................................................................. 35 8. Protecting Against External and Environmental Threats .......................................................... 35 9. Working in Secure Areas ....................................................................................................... 35 10. Delivery and Loading Areas ................................................................................................... 36 11. Equipment ........................................................................................................................... 36 11.1. Equipment Siting and Protection ................................................................................. 36 11.2. Supporting Utilities..................................................................................................... 37 11.3. Cabling Security.......................................................................................................... 37 11.4. Equipment Maintenance ............................................................................................. 38 11.5. Removal of Assets ...................................................................................................... 38 11.6. Security of Equipment and Assets Off-Premises............................................................ 39 11.7. Secure Disposal or Re-use of Equipment ...................................................................... 40 11.8. Unattended User Equipment....................................................................................... 40 11.9. Clear Desk and Clear Screen Policy............................................................................... 41 12. Management of Removable Media........................................................................................ 41 Part 5: Operations Security and Business continuity ............................................................. 43 1. Purpose ............................................................................................................................... 43 2. Introduction......................................................................................................................... 43 Lebanese National Security Policy Guidelines v1.7 Page 7|

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