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Difficulty: MediumIP Addressing and Network Configuration

A user's workstation is assigned a static IP address of 192.168.4.15/24192.168.4.15/24. The user can successfully ping other local computers on the 192.168.4.0/24192.168.4.0/24 network segment, but cannot reach external internet addresses such as 1.1.1.11.1.1.1 by IP address. Other devices on the same local subnet can access external networks without issue. Which of the following network settings is most likely missing or misconfigured on the workstation?

  1. Default GatewayAnswer
  2. B
    DNS Server Address
  3. C
    APIPA Configuration
  4. D
    Layer 2 Switch Port Mode

Answer

The Default Gateway setting is missing or misconfigured on the workstation.
The default gateway serves as the access point or router interface that forwards packets from the local subnet to external networks. Because the workstation can communicate with devices on its own subnet (192.168.4.0/24192.168.4.0/24) but cannot route traffic to remote IP addresses such as 1.1.1.11.1.1.1, the missing or incorrect Default Gateway address is the root cause.

Step-by-Step Solution

1
Analyze local vs. remote network connectivity results
Successful local pings confirm Layer 1 and Layer 2 network access as well as correct local subnet IP configuration (192.168.4.15/24192.168.4.15/24).
Traffic staying within the 192.168.4.0/24192.168.4.0/24 network does not require a router.
2
Evaluate why direct IP requests to remote destinations (1.1.1.11.1.1.1) fail
Destinations outside the local subnet require packets to be forwarded to a local router (the default gateway).
If the default gateway IP is omitted or incorrectly set, the workstation cannot route packets outside 192.168.4.0/24192.168.4.0/24.

Key Concept

Default Gateway Configuration and IP Routing Boundaries
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Topics

IP Addressing and Network Configuration

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