The ICAP server can then modify or augment the content as per the predefined policies and return the processed content to the network device. This channel allows the network device to send HTTP messages, such as requests and responses, to the ICAP server for analysis and action. ICAP operates by establishing a communication channel between the network device and the ICAP server. This separation of content processing tasks helps improve network performance, scalability, and flexibility. ICAP was first introduced in the late 1990s as a means to offload tasks related to web content adaptation, filtering, and transformation from the primary processing devices to specialized servers. So, what exactly is ICAP? ICAP, or the Internet Content Adaptation Protocol, is a protocol that allows network devices, such as proxy servers and gateways, to outsource content-related processing to specialized servers known as ICAP servers.
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