The scalability, reliability and cost benefits of Security as a Service are being realized for enterprises. The following sections outline key benefits of Security as a Service for enterprises.

1. PROTECTION FOR DISTRIBUTED ENTERPRISES Today, enterprises are getting decentralized and have branch branches across the world. Also, enterprises are increased to acceptance of telecommunication. This decentralized enterprises challenges IT environment when it comes to managing security solutions in lots of different locations. In the hardware based security model, a box is typically deployed at each office location. As the number of offices increase in different locations, more boxes need to by deployed and managed for its security. The hardware based security model faces management problem on small branch offices and telecommuters. Normally, small branch offices may not have enough IT resources on-site and telecommuters work from home offices. With enterprise changes, the hardware based security model becomes untenable. As such, enterprises usually force employees to virtual private network(VPN) to headquarter locations to leverage on-premise security appliances. This leads to unnecessary traffic backhaul with increased bandwidth cost and added latency for users. Security as a service eliminate these problems. Traffic from headquarter, branch offices and home offices is redirected to the cloud. Security and policy are enforced across the cloud regardless of user's location or access devices. Especially, cloud based security service for web and e-mail is the most significant for a cloud based security offering. Managing control over mail flow and access to web resources is very critical. Security as a Service provides the ability to control access to websites and Internet based applications. 2. FAST INSTALLATION Appliance based security products and endpoint products are frequently hard to deploy on its environment. Appliances should ship to various locations, configured appropriately, installed and tested. Endpoint security agents need to be installed on user PC of device. These security products can take several months, and often requires lots of resources to work properly. Cloud based Security as a Service can eliminate the requirement for on-premise hardware and software deployment. As security service eliminates to deploy hardware, it automatically cuts down any rack-space, power,cooling and asset management requirements. With Security as a Service, enterprises simply require to configure their edge routers to redirect traffic to the cloud. The traffic redirection typically can be done on routers and firewalls by using various methods; GRE tunnels, VPN, prozy chaning and port forwarding. 3. SCALABILITY As a business scales, IT requirement and cost is increased. For security appliances, it is hard to expect IT requirements and cost for future. Most enterprise IT professionals plan to invest in security appliances. They add to plan to budget for future users. As the business grow, they may need to re-invest in bigger appliances without having fully depreciated the cost of the original purchase. Cloud based security services offer amazing scalability on demand. The pay-as-you-go plan is perfect for businesses that do not spend capital expenditure based on future IT requirement. On the contrary, cloud based security service can be switched on or off as needed and can scale up and down as business requirements change. The scalability offered by the cloud is perfect in today's IT environment. 4. RELIABILITY Security as a Service is considerably more resilient than an appliance type of security solution. Enterprises choose security service around uptime, latency, protection coverage,etc. A properly designed security service ensures that is designed for fault-tolerance in infrastructure. When several data centers go offline, security as a service enables to provide significant redundancy. A well-designed security service will distribute processing across numerous nodes deployed in redundant data centers around the world. System health monitoring, upgrades and fault management centrally by cloud service vendor. Economies of scale provide a highly reliable security service to enterprises. 5. LOWER COST Security as a Service significantly reduces the total cost of ownership (TCO) for enterprise security. Security appliances incur both capital expense and operation expense. Capital expense can be equipment procurement costs, deployment cost, personnel training costs, etc and operation expense can include annual maintenance charge and IT administration cost, etc. On the contrary, security as a service virtually eliminates capital expense and spends lower operation expense with scalability. As security threats become more advanced and complex, security costs for protection increase. Appliance based security is typically dedicated to a specific security feature. If enterprises need web and email security solutions and also want to implement a Data Loss Prevention (DLP) system, they would have to deploy three separate appliance based solutions. At that time, enterprises need to spend both capital expense and operation expense as IT resources need to be trained to manage and from separate appliances. However, well designed cloud based service provides consolidated security. Enterprises features on demand. Enterprises do not need to spend capital expense for new security and operation expense for management and maintenance. Web security TCO can be reduced significantly by security as a service as compared to appliance based security.