Work through routing, switching, wireless deployment, and physical installation choices for the current Network+ implementation domain.
This chapter is where Network+ turns concepts into build choices. CompTIA wants you to recognize how routers, switches, access points, circuits, and install constraints fit together in an actual deployment.
NAT: Network address translation, rewriting source or destination addresses at a boundary device.
VLAN: Virtual LAN that creates separate Layer 2 broadcast domains on shared switching hardware.
CompTIA currently weights this domain at 20% of the Network+ exam.
| Lesson | Focus |
|---|---|
| 2.1 Routing Technologies, NAT & Route Selection | Understand static routing, dynamic routing, NAT, PAT, FHRP, VIPs, and route preference in branch and enterprise scenarios. |
| 2.2 Switching Technologies, VLANs & Layer 2 Design | Use VLANs, trunks, interface settings, spanning tree, MTU, and jumbo-frame concepts correctly in switching scenarios. |
| 2.3 Wireless Devices, Channels & WLAN Design | Connect SSIDs, channels, authentication, guest design, antennas, roaming, and access-point placement to real wireless deployment choices. |
| 2.4 Physical Installations, Power & Environment | Work through installation implications, power choices, and environmental conditions that affect real network builds. |
| If the question is really about… | Go first to… |
|---|---|
| path choice, NAT, first-hop redundancy, or route behavior | 2.1 Routing Technologies, NAT & Route Selection |
| VLANs, trunks, STP, or interface configuration | 2.2 Switching Technologies, VLANs & Layer 2 Design |
| channels, SSIDs, guest access, or AP behavior | 2.3 Wireless Devices, Channels & WLAN Design |
| cabling, power, temperature, or install practicality | 2.4 Physical Installations, Power & Environment |
Use these tie-breakers:
| If the close answers differ on… | Lean toward… |
|---|---|
| routing versus translation | the answer that fixes path choice separately from address rewriting |
| wireless feature versus RF reality | the answer that matches channel, placement, or coverage constraints |
| elegant feature versus practical install | the answer that still works under power, heat, EMI, or serviceability constraints |
| advanced feature versus simple requirement | the least complicated build that still satisfies the actual need |
Protect these lessons first:
Even when Network+ moves into another domain, the ideas here keep returning. Treat this chapter as a reusable reasoning layer, not as a one-time reading block.