Скачать или смотреть Data Center Components & Services Explaine | Day 5 Discussion | Data Center Tier | HLD & LLD Diagram

A *Data Center Tier* classification follows the Uptime Institute's Tier Standard, which defines reliability and redundancy levels. It consists of **Tier I to Tier IV**, with increasing levels of availability, redundancy, and fault tolerance.

*Data Center Tiers Overview*
1. *Tier I* – Basic Capacity (99.671% uptime, no redundancy)
2. *Tier II* – Redundant Capacity Components (99.741% uptime)
3. *Tier III* – Concurrently Maintainable (99.982% uptime)
4. *Tier IV* – Fault-Tolerant (99.995% uptime)

*High-Level Design (HLD) – Conceptual & Logical Design*
The *HLD* provides an overall architecture and design strategy, focusing on:
**Data Center Location & Layout**: Rack arrangements, cooling zones, and power distribution.
**Network Topology**: Core, distribution, and access layers with redundancy.
**Power & Cooling**: UPS, generators, HVAC, and environmental monitoring.
**Security Architecture**: Physical and logical security, firewalls, access control.
**Scalability & Redundancy**: High availability, failover mechanisms, multi-path routing.
**Compliance & Certifications**: ISO 27001, PCI DSS, HIPAA, etc.

*Low-Level Design (LLD) – Detailed Implementation Plan*
The *LLD* provides precise configurations and deployment details, including:
**Physical & Logical Diagrams**: Rack elevation, network cabling, fiber optics routes.
**IP Addressing & VLAN Design**: Subnet allocation, segmentation, and security policies.
**Switching & Routing Configurations**: Protocols like OSPF, BGP, VRRP, STP, LACP.
**Firewall & Security Policies**: ACLs, IPS/IDS, SSL VPN, Zero Trust implementations.
**Storage & Virtualization Details**: SAN/NAS, hypervisor setups, VMs placement.
**Redundancy & Failover Mechanisms**: HA pairs, load balancing, disaster recovery.

Would you like assistance in drafting a specific *HLD and LLD document* based on a certain tier?

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