Network Plus Skills Measured

Networking Concepts covers the language of networks: OSI and TCP/IP models, encapsulation, ports, protocols, IP addressing, subnet masks, DNS, DHCP, routing, switching, cloud service models, and performance terms such as latency, jitter, and packet loss. The exam uses these basics to test whether you can interpret what part of communication is failing.

Implementation questions ask how to place and configure technologies such as VLANs, trunks, wireless networks, DHCP scopes, PoE, fiber transceivers, and static routes. The most common trap is choosing a feature that sounds related but solves a different design problem. For example, a native VLAN issue is not fixed by changing a wireless channel, and a DHCP reservation is not the same as an exclusion.

Operations skills involve keeping networks understandable and supportable. Study rack diagrams, logical diagrams, IP address plans, baselines, SNMP, syslog, patching, backup concepts, disaster recovery terms, change management, and documentation. On the exam, operational questions often ask what record, alert, diagram, or process would help prevent repeat incidents.

Security questions focus on practical controls: authentication, authorization, accounting, MFA, ACLs, management-plane protection, firewalls, IDS, IPS, VPNs, TLS, segmentation, microsegmentation, RADIUS, TACACS+, and hardening unused services. Expect scenario wording where more than one control looks useful; choose the one that directly matches the risk described.

Troubleshooting is the skill that ties the exam together. Know the troubleshooting methodology and the difference between tools: ping for reachability, traceroute for path, nslookup or dig for name resolution, cable testers for physical faults, interface counters for link problems, and logs for device or service clues. The best answer is often the next logical verification step, not the most dramatic fix.