Networking
Free CompTIA A+ (Core 1) practice — 6 questions on Networking, with explanations. No sign-up. Full 12-question mixed test →
A network administrator configures a monitoring station to receive unsolicited notifications from managed switches whenever a critical event occurs (e.g., interface down). On which port do the managed devices send these notifications to the monitoring station?
SNMP traps (unsolicited alerts sent from agents to the management station) use UDP port 162. Regular SNMP queries/polling from the manager to the agent use UDP 161.
A technician is terminating a fiber optic run in a high-density patch panel and needs a small-form-factor connector with a push-pull latching mechanism that allows twice the port density of older fiber connectors on the same panel. Which connector should be used?
The LC (Lucent Connector) is a small-form-factor fiber connector with a push-pull latch, allowing higher port density than SC or ST connectors, making it ideal for dense patch panel installations.
A company wants to deploy new access points capable of operating in the 6GHz frequency band to avoid interference from legacy 2.4GHz and 5GHz devices. Which wireless standard supports this capability?
Wi-Fi 6E extends the 802.11ax standard to operate in the newly opened 6GHz band, providing additional non-overlapping channels and reduced interference from legacy 2.4GHz/5GHz devices.
A technician runs ipconfig on a Windows workstation and finds an IPv6 address beginning with fe80::. The workstation has full network and internet connectivity. What does this address indicate?
Addresses beginning with fe80:: are IPv6 link-local addresses, automatically assigned to every interface regardless of DHCP status, and used only for communication within the local network segment — they do not indicate a configuration failure.
A customer in a remote rural area has no cable, DSL, or fiber options and is considering satellite internet service. Which characteristic should the technician warn the customer about, especially regarding VoIP or real-time video conferencing?
Traditional satellite internet (geostationary) involves signals traveling roughly 22,000 miles to the satellite and back, producing latency of 500-700ms or more, which severely impacts real-time applications like VoIP and video conferencing.
A small office wants to isolate several IoT smart devices from the main office network for security purposes, but only has a single managed switch and one router available. Which solution best achieves this isolation without purchasing additional hardware?
A VLAN (Virtual LAN) logically segments a single physical switch into separate broadcast domains, allowing IoT devices to be isolated from the main network using existing hardware and appropriate inter-VLAN routing rules.
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