CompTIA Network+ case studies
CompTIA Network+ · Put your knowledge to work in context.
CompTIA Network+ is a vendor-neutral certification that validates foundational networking knowledge and hands-on skill. The current release, exam code N10-009 (version V9), launched on June 20, 2024, and assesses network connectivity, documentation, service configuration, data centers, cloud and virtual networking, monitoring, troubleshooting, and security hardening. The CompTIA Network+ case studies are 5 cases and about 4,217 words.
1The Subnet That Ran Out of Addresses
An office uses 10.20.5.0/24 for a single flat user VLAN. The DHCP scope 10.20.5.100–200 is exhausted; headcount grew by 90 desks last quarter and the site now runs roughly 310 devices - laptops, 45 IP phones, 12 printers, badge readers, and 60 IoT sensors.
733 words, about 4 min2Warehouse Wi-Fi and the Scanner Dropouts
A 60,000 sq ft distribution center has 32 ft ceilings and steel racking 24 ft high. Twelve ceiling-mounted enterprise 802.11ac APs went in 18 months ago, but the channel plan was copied from the old consumer deployment: 2.4 GHz on channels 1, 6, and 11 at 20 MHz only, 5 GHz on auto.
854 words, about 4 min3Four Thousand Alerts and One Missed Outage
A network team supports 400 switches and routers. Syslog goes to a collector, SNMP polls every 60 seconds into a monitoring server, and every alert lands in one shared mailbox.
819 words, about 4 min4The Rogue DHCP Server on the Third Floor
Third-floor users at a 500-person office can reach the internet but not internal file shares. ipconfig shows 192.168.1.57/24 with gateway 192.168.1.1, on a floor that should be 10.10.30.0/24.
908 words, about 5 min5Two Gigabytes in Four Hours
Users at a branch office report that copying a 2 GB file to the data-center file server takes about four hours. The same file from a different branch takes six minutes.
903 words, about 5 min