核心层采用两台核心交换机实现冗余，以实现校园网的冗余备份。防火墙为校园

The core layer uses two core switches to achieve redundancy to achieve redundant backup of the campus network. The firewall provides a safe barrier for the campus network to ensure the security of the campus network. The function of the firewall is mainly to filter, allowing packets conforming to the control policy to pass through the firewall, while the blocking function is just the opposite. The core switch is connected to the campus through 10 Gigabit fiber

The core tier uses two core switches for redundancy to enable redundant backup of the campus network. Firewall provides a secure barrier for campus network and ensures the security of campus network. The function of a firewall is primarily filtering, allowing messages that comply with control policies to pass through the firewall, whereas blocking is the opposite. The core switch is connected to the campus via 10 gigabit fiber

The core layer uses two core switches to achieve redundancy, so as to realize the redundancy backup of campus network. The firewall provides a security barrier for the campus network to ensure the security of the campus network. The main function of firewall is filtering, which allows the packets in line with the control strategy to pass through the firewall, while the function of blocking is just the opposite. The core switch is connected to the campus through 10 Gigabit optical fiber<br>