Version 4.1 - 5.5.d Network Access
This section is pretty tough to write. Not because of the topic, but because of redundancy. The study guides just skip over this section. Like "device administration" that uses TACACS+, "network access" should point to RADIUS (which has already been covered). If I wanted to "flesh out" this section, I would talk about EAPoL and 802.1x - but that's the next section. Or perhaps I should talk about the NAC Server (section 5.8) or the NAC Agent (section 5.9.d). See what I mean? So instead of wasting time with redundancy, I'm going to move on to 802.1X.