Covid 19 Update: Given the current global situation, we have paused the delivery of our LiveOnsite courses, but our LiveOnline and OnlineAnytime Packages remain unaffected. Browse over 50 online courses in our course catalogue, or get in touch to register your interest in future LiveOnsite courses when we are able to safely resume in person training.


Sign up for new releases:

We update our course portfolio and training resource on a regular basis. If you would like to be notified when we launch a new course, update NetX or introduce new glossary terms, feel free to join our mailing list.

Filter Glossary By Letter:


Glossary Results

A 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

The 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.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

The 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.509 is the ITU recommendation that defines the format for digital certificates and CRL (Certificate Revocation Lists). X.509 applications include X.... View more

Term 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


Find out more
  • Over 280 hours of content
  • Detailed PDF courseware
  • Unrestricted access to NetX
  • Courses certified by the ITP and CPD


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

Explore NetX today with a
free trial.
More Info about NetX