Security services refers to any set of steps, techniques, procedures or policies that are adopted in order to guarantee the security of networks, information and data. The main goal of security services is to provide an information assurance service for organizations. This is done by detecting, preventing, analyzing, and fixing security vulnerabilities. Security services also include intrusion detection, antivirus software, security management systems, and information security systems. In other words, security services cover all the aspects of network security. As defined in ITU-T Topical Recommendation, security services is a joint effort between the networking equipment vendor and the organization that require it. A security service is a proactive service, offered by a discrete layer of communication open to all networks or by those operating information systems, that ensures sufficient protection of network data or of systems as specified by ITU-T. The main article below briefly discusses the main aspects of security services. Many security services are divided into two classes. These classes are service oriented and error proof. For instance, in a WAN environment, a WAN application security service prevents the unauthorized connection of a non-authorized computer or server. The service oriented ones prevent the occurrence of security failures and errors, detecting the presence of these failures and then handling them appropriately. On the contrary, the most important aspect of security services is the ability of a system to detect, manage, and eliminate potential security threats based on knowledge of existing and emerging problems. Some security services such as connectionless data source authentication to allow for data to be sent in a clear and reliable fashion regardless of whether the communication is secure or not. On the other hand, some security services such as encryption, token-based authentication, and mechanism based authentication allow for data to travel in a secure manner despite being unencrypted or unsecured. There is also the so-called connectionless application security services, which allows for secure data to be sent and received without any form of secure connection. Security services provide a higher level of protection for corporate as well as personal data. The most common security services that corporations use are antivirus, firewalls, and intrusion detection systems. However, security services provide an extra level of security which is often not provided by standard corporate security programs. The biggest benefit that a client gets from security services is the ability to monitor all web activity including login attempts, application authorization, and the response from servers and applications. This allows a security service provider to pinpoint threats and to provide response and prevention measures. Some of the popular security services provided by different security companies include: IPTV, Wi-Fi Direct, PIX, OTT VoIP, Linux secure VPN, open systems DHT, and software VPN. IPTV provides streaming media solutions for users at home and organizations as well. It provides remote control features for controlling and viewing live TV from anywhere in the world. It works on a P2P network and is delivered through a digital cable. In case of Wi-Fi Direct it provides access to the internet on a pay-per-click basis. It uses a digital certificate to prove the identity of the network user and to authenticate the data transmitted over the network. To get a detailed overview of this topic, see here:https://www.encyclopedia.com/science-and-technology/computers-and-electrical-engineering/computers-and-computing/computer-security,
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