220-1201 Practice Question: A user wants to connect a new laptop to a wired…

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  A static IP address in the same subnet as the network

  Why it's wrong here

  Configuring a static IP address is a Layer 3 (network layer) function, which becomes relevant only after a device has successfully gained access to the network. 802.1X, however, operates at Layer 2 (data link layer) to control port access before any IP traffic can be forwarded. Without successful 802.1X authentication, the switch port remains unauthorized, preventing any network communication, including IP address assignment or usage.

• ✗

  The correct SSID and wireless security key

  Why it's wrong here

  SSID (Service Set Identifier) and wireless security keys (e.g., WPA2/3 Pre-Shared Key) are specific authentication and encryption parameters used exclusively for Wi-Fi (802.11) wireless networks. The scenario describes a wired connection to a switch utilizing 802.1X for network access control. Therefore, these wireless-specific credentials are entirely irrelevant and cannot be used to authenticate a wired laptop connection.

• ✓

  Valid 802.1X credentials (username and password or certificate)

  Why this is correct

  802.1X is a port-based network access control protocol that requires the client device (supplicant) to authenticate itself to the network switch (authenticator) before gaining full network access. This authentication typically involves providing valid credentials, such as a username and password or a digital certificate, which are then verified by a backend authentication server, often a RADIUS server. Until these credentials are successfully validated, the switch port will remain in an unauthorized state, blocking all network traffic from the laptop.

• ✗

  A crossover cable to connect to the switch

  Why it's wrong here

  Modern network switches and network interface cards (NICs) are equipped with auto-MDI/X (Automatic Medium-Dependent Interface Crossover) technology. This feature automatically detects the wiring configuration of the Ethernet cable and adjusts the transmit and receive pairs accordingly. Consequently, using a straight-through cable is perfectly acceptable for connecting a laptop to a switch, rendering a crossover cable unnecessary for establishing the physical link. The primary barrier to network access in this scenario is authentication, not the cable type.

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