Question

Difficulty: HardNetwork Host Services and Server Roles

Employees at a newly established satellite office report that they can browse external internet websites normally, but cannot access internal corporate resources using internal domain names such as `intranet.contoso.local`. Network diagnostics confirm that workstations can successfully ping internal servers by their IP address (10.4.1.5010.4.1.50). Further inspection of client TCP/IP configurations reveals that workstations are dynamically receiving an external public resolver (1.1.1.11.1.1.1) as their primary DNS server. Which of the following host services or server configurations must be updated to automatically distribute the correct internal DNS server address (10.4.1.510.4.1.5) to all office clients?

  1. The DHCP server scope optionsAnswer
  2. B
    The DNS server conditional forwarders
  3. C
    The Web proxy server inbound listening port rules
  4. D
    The client system APIPA configuration settings

Answer

The DHCP server scope options must be modified to distribute the internal DNS server address.
The correct answer identifies the DHCP server scope options. DHCP servers dynamically assign IP configurations to host clients. Through scope options (specifically DNS Server / Option 006), the administrator specifies which DNS server IPs are handed out to clients. Updating this option from the public resolver to the internal DNS server resolves internal domain lookups across the office.

Step-by-Step Solution

1
Analyze the reported network symptom
Clients can reach external sites by domain name and internal sites by IP address (10.4.1.5010.4.1.50), but fail to resolve internal domain names (`intranet.contoso.local`).
This indicates a name resolution failure specific to the internal network namespace.
2
Evaluate client network configuration
Clients receive an external DNS server address (1.1.1.11.1.1.1) dynamically.
External public DNS servers cannot resolve internal enterprise domain names.
3
Identify the server role responsible for distributing IP parameters
The DHCP server controls dynamic parameter assignment via scope options (Option 006 for DNS servers).
Updating the DHCP scope options ensures all client hosts automatically receive the internal DNS server address (10.4.1.510.4.1.5).

Key Concept

DHCP Server Scope Options and DNS Server Role Integration
Estimated Time:1m 30s
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