Presented by an example of a network updating in a security broker,the paper focuses on how to improve redundancy and tolerance in a LAN through appending equipment and making different network segments.

• 本文以证券营业部网络改造为例 ,着重阐述了如何在局域网中通过增加设备、划分不同网段 ,从而使网络具有冗余性和容错性。