CREST CRT syllabus - extra questions And Answers 2022

What is TETRA? Terrestrial Trunked Radio (TETRA; formerly known as Trans-European Trunked Radio) is a professional mobile radio and two-way transceiver specification. TETRA was specifically designed for use by government agencies, emergency services, (police forces, fire departments, ambulance) for public safety networks, rail transport staff for train radios, transport services and the military. What is MPLS? Multiprotocol Label Switching (MPLS) is a type of data-carrying technique for high-performance telecommunications networks that directs data from one network node to the next based on short path labels rather than long network addresses, avoiding complex lookups in a routing table. 5 Common ICMP messages? 1. Ping request/reply (8, 0), 2. destination unreachable (3), 3. redirect (5), 4. timestamp (13) and timestamp reply (14), 5. time exceeded (11) Why was ISO 31000:2009 contentious in its definition of risk? One of the key paradigm shifts proposed in ISO 31000 is a controversial change in how risk is conceptualised. Under the ISO 31000:2009 and a consequential major revision of the terminology in ISO Guide 73, the definition of "risk" is no longer "chance or probability of loss", but "the effect of uncertainty on objectives" ... thus causing the word "risk" to refer to positive possibilities as well as negative ones. - Wikipedia What is the main 2G standard? GSM What is the main 2.5G standard?