FC0-U71 Infrastructure Practice Question
A technician needs to connect a new desktop computer to a wired network in an office where the wall jack is active and the network uses DHCP. The computer has an integrated RJ45 port. Which of the following should the technician do to enable network connectivity?
⚠ Common exam trap
The trap here is overcomplicating a straightforward wired connection by adding wireless hardware or manual IP settings when DHCP and an active jack already meet the requirement.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Connect an Ethernet cable from the wall jack to the computer's RJ45 port
With an active wall jack, an integrated RJ45 port, and DHCP in place, the only required action is to connect a standard Ethernet cable between the jack and the computer. DHCP will handle IP configuration automatically. Wireless, static addressing, and Internet Connection Sharing are either unnecessary or incorrect for this wired scenario.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Assign a static IP address in the same subnet as the gateway
Why it's wrong here
The network uses DHCP, so manually assigning a static IP is unnecessary and could cause an address conflict if the chosen address is already leased. DHCP is designed to handle addressing automatically. While a static address can work in some environments, it is not the correct action when DHCP is available and no static requirement is stated.
- ✗
Install a wireless network adapter and configure the SSID
Why it's wrong here
Installing a wireless adapter would provide connectivity, but it does not use the active wired wall jack and adds unnecessary hardware. The scenario specifies a wired network and an integrated RJ45 port, so wireless is not required. This option ignores the available wired infrastructure and introduces a different connection method than the one described.
- ✓
Connect an Ethernet cable from the wall jack to the computer's RJ45 port
Why this is correct
Connecting a standard Ethernet cable between the active wall jack and the integrated RJ45 port provides the physical link needed for the network. Since the network uses DHCP, the computer will automatically request an IP address and other settings. This is the correct and sufficient step to establish wired connectivity without additional configuration.
- ✗
Enable Internet Connection Sharing on the computer
Why it's wrong here
Internet Connection Sharing allows one computer to share its connection with others, which is not the goal here. The computer needs to join the existing network, not act as a gateway for other devices. Enabling ICS would not provide the computer with connectivity from the wall jack and could disrupt network settings.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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