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Question 635 - 220-1102 discussion

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A user reports that a device with a statically defined IP is unable to connect to the internet. The technician runs the ipconfig /all command and sees the following output:

IPv4 Address............ 192.168.0.74

Subnet Mask.............255.255.255.255

Default Gateway......... 192.168.0.1

Which of the following is most likely the reason for the issue?

A.
The default gateway is up.
Answers
A.
The default gateway is up.
B.
The user has an APIPA IP address.
Answers
B.
The user has an APIPA IP address.
C.
The IP address is on the wrong subnet
Answers
C.
The IP address is on the wrong subnet
D.
The subnet mask is incorrect.
Answers
D.
The subnet mask is incorrect.
Suggested answer: D

Explanation:

The ipconfig /all output shows the following:

IPv4 Address............ 192.168.0.74 Subnet Mask............. 255.255.255.255 Default Gateway......... 192.168.0.1

The issue with the subnet mask being set to 255.255.255.255 is that it specifies a single host subnet, meaning the device cannot communicate with other devices on the network or access the internet. The correct subnet mask for a typical home network should be:

Subnet mask of 255.255.255.0: This allows for communication within the same local network (192.168.0.0/24).

Default gateway 192.168.0.1: Correct, this is the typical address for the router.

IPv4 Address 192.168.0.74: Correct, within the correct subnet range.

Changing the subnet mask to 255.255.255.0 will resolve the connectivity issue.

CompTIA A+ 220-1102 Exam Objectives, Section 2.5: Given a scenario, install and configure basic wired/wireless small office/home office (SOHO) networks.

IP addressing and subnetting documentation.

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asked 02/10/2024
Kushantha Gunawardana
49 questions
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