200-101 · Question #134
Refer to the exhibit which shows a PC's IP configuration (IP Address: 192.168.1.12, Subnet Mask: 255.255.255.0, Default Gateway: 192.168.1.1, DNS Services: 192.168.1.1) and a router interface (Fa0/0:
The correct answer is B. incorrect IP address. The subnet mask, default gateway, and DNS server are all consistent with the router interface at 192.168.1.1, making the PC host IP address the only misconfigured element in the exhibit.
Question
Exhibit
Options
- Aincorrect subnet mask
- Bincorrect IP address
- Cwrong default gateway
- Dwrong DNS server
How the community answered
(25 responses)- A4% (1)
- B92% (23)
- D4% (1)
Why each option
The subnet mask, default gateway, and DNS server are all consistent with the router interface at 192.168.1.1, making the PC host IP address the only misconfigured element in the exhibit.
The subnet mask 255.255.255.0 (/24) is correct and consistent with the 192.168.1.0/24 network defined by the router's Fa0/0 interface.
The IP address is incorrect because, in the context of the full exhibit, it either conflicts with another assigned address or the PC is connected to a segment where a different host address is required. The subnet mask 255.255.255.0 and gateway 192.168.1.1 both align correctly with the router's Fa0/0, so the only parameter that can account for the error is the host portion of the IP address itself.
The default gateway 192.168.1.1 exactly matches the router's Fa0/0 address and is reachable within the /24 subnet, making it a valid gateway configuration.
Using 192.168.1.1 as the DNS server is valid because a router can act as a DNS forwarder, and the address is within the same /24 subnet as the PC.
Concept tested: Host IP address configuration and subnet validation
Source: https://www.cisco.com/c/en/us/support/docs/ip/dynamic-host-configuration-protocol-dhcp/13696-dhcp-debug.html
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