Network security is important for home networks as well as in the business world. Most homes with high-speed internet connections have one or more wireless routers, which could be exploited if not properly secured. A solid network security system helps reduce the risk of data loss, theft and sabotage.Network security is the security provided to a network from unauthorized access and risks. ... The most common and simple way of protecting a network resource is by assigning it a unique name and a corresponding password.