Core Layer

Function: As the core hub of the entire network, responsible for handling high bandwidth data exchange.
Hardware selection: Choose high-performance, modular enterprise switches such as Cisco Nexus series or Huawei CloudEngine series.
Features: Non blocking full duplex communication, multiple high-speed uplinks ensure redundancy; Supports IPv6 and multiple routing protocols.

Distribution Layer

Function: Policy control point, responsible for executing routing selection, access control, traffic management, and security policies.
Hardware selection: Intelligent switches, such as Juniper EX series or H3C S5500 series.
Features: VLAN routing and firewall functionality, enhancing network security protection capabilities; QoS management ensures critical application performance.

Access Layer

Function: Directly connect terminal devices such as PCs, printers, and other IoT devices.
Hardware selection: Fixed port switches that are easy to manage and maintain, such as Dell PowerConnect or Ruijie RG-S2900 series.
Features: PoE power interface, convenient for installing wireless APs, IP cameras and other devices; The 802.1X authentication mechanism ensures user authentication.

Wireless LAN

Function: Provide seamless Wi Fi coverage for mobile devices.
Hardware selection: High performance wireless access points (APs), such as Aruba Instant On series or Ruckus ICX series.
Features: Supports the latest Wi Fi standards (such as Wi Fi 6), with fast roaming and automatic load balancing capabilities.

WAN Optimization

Function: Improve communication efficiency between remote branch offices and headquarters.
Hardware selection: SD-WAN router or dedicated WAN optimizer, such as Riverbed SteelHead or Silver Peak VX series.
Features: Reduce latency and jitter, improve application response speed; Support hybrid cloud connectivity to simplify cloud resource access.

Security measures

Boundary protection: Deploy next-generation firewalls (NGFW) detection/defense(IDS/IPS) to protect the network threats. Internal isolation: By using VLAN egmentation techniques lateral movement and reduce potential attack surface. Identity verification authorization: Use a unified management system (IAM), combined802.1X authentication. Log auditing and monitoring: All critical operations recorded files and analyzed and alerted in real-time through SIEM .

Performance Optimization

Cache optimization: Reasonably set the buffer size to avoid packet loss caused by sudden traffic.
Quality of Service (QoS): Allocate different bandwidth resources based on application priority to ensure that important services are not affected.
Load balancing: Using dynamic routing algorithms to distribute traffic pressure and improve overall network performance.

Scalability planning

Considering the potential growth demand in the future, this plan has reserved sufficient expansion space in hardware selection, and also maintains version updates in software to introduce new technologies and features at any time. In addition, the changes brought by new technologies such as virtualization and containerization have been taken into account to ensure that the network architecture can flexibly adapt to the needs of different scenarios.

Remote work support

In response to the growing demand for remote work, the solution includes support for enterprise virtual private networks (VPNs), allowing employees to securely connect to the company's intranet. Meanwhile, utilizing secure collaboration tools from cloud service providers such as Microsoft Teams or Zoom further enhances the ability for remote communication and collaboration.