I asked this question when I depped in (but it was between CTM and CTN/IT) and basically CTMs will be a "jack of all trades" in this whole field whereas CTNs are hackers/cyber security experts and ITs are like local LAN administrators.
CTR I didn't study up on myself but signals intelligence is the description.
I was looking up manning levels and community overviews when I was wanting to switch to CTN and I saw something like "CTMs in years 2011, etc, etc (earlier years) can change over to CTN....contact name here for information..." You have to have been in a few years to switch.
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Boot Camp: 20131125-20140124 DIV 067
CompTIA A+ Certified: May 29, 2012
CompTIA Network+ Certified: June 5, 2013
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