Information Communication Technology ICT – 8 Safety and security | e-Consult
8 Safety and security (1 questions)
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A DMZ is a network segment that sits between the internal network and the external network (e.g., the internet). It's designed to host publicly accessible servers, such as web servers and email servers, while protecting the internal network from direct exposure to external threats.
A DMZ is used in conjunction with a firewall because:
- Isolation: The DMZ provides a layer of isolation between the public internet and the internal network. If a server in the DMZ is compromised, the attacker's access to the internal network is limited.
- Controlled Access: The firewall controls the traffic flow between the DMZ and the internal network. Only specific ports and protocols are allowed, minimizing the risk of unauthorized access.
- Protection of Internal Resources: By placing publicly accessible servers in the DMZ, the firewall protects the internal network's sensitive data and resources from direct attacks.
- Defense in Depth: The DMZ and firewall together create a defense-in-depth strategy, meaning that multiple layers of security are in place to protect the network. If one layer fails, the other layers can still provide protection.
In essence, the DMZ acts as a buffer zone, shielding the internal network from direct exposure to the internet while still allowing users to access public services.