Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A technician is troubleshooting a desktop workstation that can successfully ping other local devices and the default gateway by IP address, but cannot access any websites when browsing with a web browser. The workstation obtains its IP configuration automatically via DHCP. The technician confirms that the DHCP server is providing a valid DNS server address and that other workstations on the same network can browse the internet normally. 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
Distractor review
Duplicate IP address on the network
A duplicate IP would cause intermittent connectivity issues and likely prevent reliable local and internet communication. The user can consistently ping local devices, making this unlikely.
B
Distractor review
Incorrect subnet mask configured by DHCP
An incorrect subnet mask would affect communication with devices outside the local subnet, but the user can ping the gateway (which is on the same subnet), so this is not the issue.
C
Distractor review
The workstation's DNS client cache is corrupted
A corrupted DNS cache would prevent name resolution for all applications, including ping by domain name. The technician only mentioned pinging by IP, but web browsing uses domain names. However, the most likely cause is a proxy setting, not cache corruption, and the user could try 'ipconfig /flushdns' to test.
D
Best answer
The workstation is configured to use a proxy server that is not available
A misconfigured or unreachable proxy server in the browser or system proxy settings can block web traffic while allowing direct IP communication. This matches the symptoms: local IP connectivity works, but web browsing fails.
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 workstation is configured to use a proxy server that is not available — The fact that the workstation can ping local devices and the gateway by IP indicates that IP connectivity and routing are working correctly. The inability to browse websites while DNS appears configured suggests a client-side issue affecting web traffic only. A common cause is a proxy server configuration in the browser or system settings, especially if the proxy is unreachable or misconfigured. A corrupted DNS cache would cause name resolution failures for all applications, but pinging by domain name would also fail, which is not mentioned. Duplicate IP addresses cause intermittent connectivity, not consistent local IP access. An incorrect subnet mask would prevent communication with devices outside the subnet, but here local pings work. Therefore, a proxy setting is the most likely culprit.
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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