Systems and Security : Architecture and Design

2. Visitor logs: Visitor logs are records of all individuals who enter a secure facility or building. These logs can be used to track who has entered the premises, when they entered, and for what purpose, and can help ensure accountability and increase physical security.

3. Faraday cages: A Faraday cage is a metal enclosure used to block electromagnetic fields and protect electronic devices from electromagnetic interference (EMI) and electrostatic discharge (ESD). Faraday cages can also be used to prevent unauthorized access to data by physically isolating the data.

4. Air gap: An air gap is a physical separation between a computer or network and other devices or networks to prevent unauthorized access to sensitive data. This can be achieved by physically disconnecting the device or network from all other networks and ensuring there is no physical or wireless connection to any other device.

5. Screened subnet (previously known as demilitarized zone): A screened subnet, also known as a demilitarized zone (DMZ), is a network segment that is isolated from other network segments to protect the internal network from external threats. The screened subnet acts as a security buffer between the internal network and the internet, allowing only authorized traffic to pass through.

6. Protected cable distribution: Protected cable distribution refers to the use of physical protection measures for cables, such as conduit and cable trays, to prevent unauthorized access or tampering with cables. This can also include the use of encryption or other security measures to protect the data transmitted over the cables.

Secure areas

Secure Areas refer to the physical spaces within an organization that are designated for the storage and protection of sensitive or critical assets such as data, equipment, or confidential documents.

1. Air Gap refers to the physical separation of a network from other networks, which helps prevent unauthorized access to critical systems.

2. Vault is a secure room or area used to store valuable items such as cash, jewelry, and sensitive documents.

3. Safe is a secure container used to store valuable items such as cash, jewelry, and sensitive documents.

A "vault" and a "safe" are both terms used to describe a secure storage area for valuables or sensitive items. The difference between the two is mainly one of size and construction.

A vault is a large, highly secure room, typically found in banks, data centers, or other commercial facilities. Vaults are constructed with thick walls and doors, and are usually secured with multiple locks, alarms, and cameras. They are designed to protect valuable items from theft, fire, and other threats.

A safe, on the other hand, is a smaller, portable container designed for use in homes, offices, or small businesses. Safes come in various sizes and materials, including steel, fireproof, or combination locks. They are typically used to store items such as cash, jewelry, and important documents. While safes offer some protection from theft, they are generally not as secure as vaults.

4. Hot aisle refers to the aisle in a data center where hot air is expelled from the servers.

5. Cold aisle refers to the aisle in a data center where cold air is supplied to the servers to cool the equipment. The hot aisle and cold aisle are typically separated by a barrier to prevent hot and cold air from mixing, and to improve the efficiency of the cooling system.