求翻译：本次的毕业设计主要是针对某个校园网的设计和VLAN的划分在知识。首先讲述的是VLAN，它给我们讲解了校园网的背景、学校的一些需求、校园网的设计原则、校园网的组网技术选择、校园网的网络现状、网络的特征、网络的拓扑结构设计、IP地址的划分、VLAN的划分、VLAN安全性的代码、VLAN的一些作用、VLAN的一些实际运用例子、等知识。最后介绍了VLAN的实例来说明对于校园网VLAN如何划分和实际如何运用是什么意思？

This design is intended for graduation a and Division of VLAN in campus network design knowledge. First told of is VLAN, it to we explained has campus network of background, and school of some demand, and campus network of design principles, and campus network of group network technology select, and campus network of network status, and network of features, and network of topology structure design, and IP address of Division, and VLAN of Division, and VLAN security of code, and VLAN of some role, and VLAN of some actual application examples, and, knowledge. At last introduce a VLAN instances to illustrate for the Division of VLAN in campus network and the actual use of