Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A user reports that they can access internal company servers by IP address but cannot access the internet. The user can ping the default gateway successfully. Other users on the same subnet have full internet access. The technician checks the user's IP configuration and sees that the IP address, subnet mask, and default gateway are correct. The DNS server address is set to the company's internal DNS server (10.0.1.10). Which of the following is the MOST likely cause of the issue?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
The user's computer has a stale DNS cache
A stale DNS cache can cause the client to use old or incorrect IP addresses for domain names, leading to failures when resolving external websites. Flushing the cache often resolves the issue.
B
Distractor review
The DHCP scope is exhausted and the user received an APIPA address
An APIPA address (169.254.x.x) would not allow the user to ping the default gateway or access internal servers. The user's IP configuration is correct and not APIPA.
C
Distractor review
The user has an incorrect default gateway configured
The user can successfully ping the default gateway, so the gateway is reachable. An incorrect gateway would prevent all off-subnet communication.
D
Distractor review
The user's subnet mask is incorrect
An incorrect subnet mask would likely prevent the user from communicating with the default gateway or other subnets. The user can ping the gateway, so the mask is likely correct.
Common exam trap
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Technical deep dive
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A user reports intermittent network connectivity on a desktop computer. The technician observes that the Ethernet link light on the NIC turns off for a few seconds and then turns back on. The cable passes a wiremap test, the switch port is verified good with another device, and the NIC driver is updated. The issue occurs more frequently when the computer's case fan runs at high speed. Which of the following is the MOST likely cause?
Question 2
A workstation is unable to connect to the internet. The technician runs the 'ipconfig' command and sees the IPv4 address is 169.254.15.200 with a subnet mask of 255.255.0.0. The workstation can ping other devices on the local subnet but cannot ping the default gateway or any external addresses. Which TWO actions should the technician take to resolve this issue? (Select two.)
Question 3
A workstation is connected to a managed switch. It obtains a valid IP address (192.168.10.50) from the DHCP server, but it cannot ping the default gateway (192.168.10.1). The link light on both the workstation NIC and the switch port are solid green. Other workstations on the same switch CAN ping the default gateway successfully. The technician accesses the switch management interface and finds that the workstation's port is configured as an access port on VLAN 10. The default gateway is located on VLAN 20. An inter-VLAN router is configured but not explicitly allowing VLAN 10 access to VLAN 20. Which of the following is the MOST likely cause of the problem?
Question 4
A company develops a web application that relies on a custom library available only for a specific Linux distribution. They want to deploy the application in the cloud with minimal administrative overhead, but they need full control over the software stack, including the ability to install the custom library and configure the web server. Which cloud service model BEST meets these requirements?
Question 5
A company has a legacy virtual machine running on a deprecated hypervisor (Hyper-V). They want to migrate this VM to a new hypervisor (VMware vSphere) hosted in a private cloud while preserving the VM's configuration, installed applications, and data. The migration must be performed with minimal downtime. Which of the following methods is MOST appropriate?
Question 6
A company hosts a critical database on a virtual machine in a public cloud. The database requires persistent storage that must be retained even if the VM is terminated. The storage must also be accessible from multiple VMs simultaneously for a future high-availability configuration. Which type of cloud storage BEST meets these requirements?
FAQ
Questions learners often ask
What does this 220-1101 question test?
CIDR notation defines the prefix length.
What is the correct answer to this question?
The correct answer is: The user's computer has a stale DNS cache — The user can ping the gateway, so layer 3 connectivity to the local network is fine. Since other users have internet access, the issue is isolated to this workstation. The fact that the user can access internal servers by IP but not the internet suggests a name resolution problem, but since internal DNS is working for others, the issue may be a misconfiguration on the user's machine that prevents resolving external names. A stale DNS cache can cause incorrect or missing entries for external domains. Flushing the DNS cache (ipconfig /flushdns) would force the client to query the DNS server for fresh records. Option B (incorrect default gateway) is not likely because the user can ping the gateway. Option C (DHCP scope exhausted) would affect all users, not just this one. Option D (incorrect subnet mask) would prevent communication with the gateway or other subnets, but the user can ping the gateway.
What should I do if I get this 220-1101 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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