X-ModemA file transfer protocol, written in 1977 by Ward Christiansen. This protocol was effective but slow. Later versions (X-Modem2 and X-Modem1K) were als... View more
X.25The X.25 protocol is a widely available, low speed, packet switched data service. It offers data rates below those of Frame Relay and in today's next ... View more
X.400X.400 is the universal protocol for email. X.400 defines the envelope for email messages so all messages conform to a standard format. ... View more
X.500The ITU X.500 family of standards defines X.500 directory services. The directory can be used for many applications, such as storing certificates, or ... View more
X.509X.509 is the ITU recommendation that defines the format for digital certificates and CRL (Certificate Revocation Lists). X.509 applications include X.... View more
X2AP - X2 Application ProtocolX2AP is a control protocol found between eNBs on the X2 control plane. Main functions of X2AP include X2 based mobility, as well as X2 "Global Procedu... View more
XCAP - XML Configuration Application ProtocolXCAP enables an XCAP Client to instruct an XCAP Server to add, modify or remove information from an XML based configuration document. This document ma... View more
XDMS - XML Document Management ServerAn XDMS is responsible for hosting several Application Usages (essentially an Application Usage is an instance of an XML configuration document relati... View more
xDSLTerm used for all forms of technology using a DSL (Digital Subscriber Line). DSL enables simultaneous two way transmission of voice and high speed dat... View more
XML - eXtensible Markup LanguageThe major difference between HTML (Hypertext Markup Language) and XML is that HTML describes the content of a web page and XML classifies the informat... View more
XnAP - Xn Application ProtocolXnAP is the control protocol used between gNBs to support a variety of RAN related procedures, such as establishing Dual Connectivity, coordination of... View more
Xon/XoffXon/Xoff is a protocol for controlling the flow of data between DCE (Data Circuit Terminating Equipment) and other devices ( DTE (Data Terminal Equipm... View more
XRES - Expected ResponseIn the UMTS authentication process the network sends RAND (Random Number) to the UMTS Subscriber, XRES is the value that the network is looking for to... View more