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Zephyr Notification Service (hm-serv)
Port 2105 is utilized for the Zephyr Notification Service, specifically for Project Athena, facilitating communication with the host manager service (hm-serv). Although port 2102 is the preferred port for such communication, port 2105 might be encountered in certain configurations or legacy setups to support messaging and notification delivery within academic or research environments originally developed at MIT..
The Zephyr Notification Service was developed under MIT's Project Athena to provide an efficient real-time messaging system for distributed computing environments. It enables users to send and receive instant notifications across a network, integrating tightly with Unix systems. The architecture leverages a combination of client libraries and server daemons to manage messaging sessions and delivery.
Port 2105 is historically associated with connections to hm-serv, the host manager component responsible for certain administrative functions within Zephyr. Despite 2102 being the standard official port, 2105 has been used in some instances or as a fallback, mainly during development or specialized implementations where separate communication channels were beneficial.
Data on port 2105 may be transmitted over TCP and UDP, offering flexibility between reliable and fast delivery modes. UDP is typically favored for notification delivery due to its low latency, while TCP might be used for establishing persistent administrative connections or ensuring more reliable message transmissions.