Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A technician is troubleshooting a user's workstation that can ping other computers on the local network but cannot access any websites. The user's router is configured with DHCP and DNS is set to automatic. The technician runs ipconfig /all and sees the workstation has an IP address of 192.168.1.45 with a subnet mask of 255.255.255.0 and a default gateway of 192.168.1.1. The technician successfully pings 8.8.8.8 from the workstation. 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 workstation has a manually configured DNS server that is unreachable
A manually set DNS server that is unreachable will cause name resolution failures while direct IP communication (ping) still works.
B
Distractor review
The subnet mask is incorrect
The subnet mask 255.255.255.0 is standard for a /24 network; pinging the gateway and internet IP confirms it is correct.
C
Distractor review
The network cable is faulty
A faulty cable would typically cause intermittent connectivity or inability to ping any addresses, not selective DNS failures.
D
Distractor review
The router's DHCP server has exhausted its IP address pool
The workstation already has an IP address from the DHCP server (192.168.1.45), so the pool is not exhausted.
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 has a manually configured DNS server that is unreachable — The workstation can ping the default gateway (192.168.1.1) and an internet IP address (8.8.8.8), which confirms that Layer 3 connectivity to the internet is working. The inability to access websites by name (e.g., www.example.com) indicates a DNS resolution failure. Since the workstation can ping 8.8.8.8, the internet connection is fine, so the issue is not with the DHCP-assigned IP or subnet. The router's DHCP settings are providing automatic DNS, but if the DNS server address is misconfigured at the client level (e.g., manually set to an incorrect DNS server), it would prevent name resolution. A faulty network cable would likely cause intermittent connectivity or no connectivity at all, not a specific failure of DNS while ICMP works. A misconfigured proxy server in the browser could also cause this, but since the workstation can ping 8.8.8.8, the route is valid, and the browser proxy setting is a more common cause when DNS seems to work but not HTTP. However, the question asks for 'MOST likely cause', and given that the DNS setting is manual and incorrect, that is a direct cause. If the DNS were set to automatic and the router's DNS is correct, then proxy settings could be the issue. The provided options should differentiate. In this scenario, the technician should check the DNS client setting first.
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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