Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A technician is troubleshooting a desktop PC in a small office. The PC can access local network resources (file servers, printers) by IP address but cannot access any external websites by domain name or IP address. The PC uses a static IP configuration: IP 192.168.1.100, subnet mask 255.255.255.0, default gateway 192.168.1.1, DNS server 192.168.1.1. The technician successfully pings 192.168.1.1 and 8.8.8.8 fails. Pinging 8.8.8.8 from another PC on the same network succeeds. Which of the following is the MOST likely cause?
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
The PC's subnet mask is incorrect.
With a subnet mask of 255.255.255.0, the PC is on the 192.168.1.0/24 network, which is correct for communicating with the gateway. If the mask were wrong, the PC might not be able to reach the gateway, but pinging the gateway succeeds.
B
Distractor review
The default gateway on the PC is misconfigured.
Pinging the gateway succeeds, so the gateway address is reachable. If the gateway were misconfigured (e.g., wrong IP), the ping would fail.
C
Best answer
The router's network address translation (NAT) is malfunctioning.
The PC can reach the gateway (internal) but cannot reach external IPs like 8.8.8.8. Since another PC on the same network can reach 8.8.8.8, the router's WAN connectivity is working. However, if NAT is failing for this specific PC (e.g., NAT table full, or ACL blocking), it would prevent that PC from reaching external destinations even though the gateway is reachable. This is a plausible troubleshooting scenario.
D
Distractor review
The DNS server setting is incorrect.
The user cannot access websites by IP address either (ping 8.8.8.8 fails), so DNS is not the issue. DNS resolution would only affect name resolution, not IP connectivity.
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 router's network address translation (NAT) is malfunctioning. — The PC can reach the local gateway (192.168.1.1) but cannot reach external IPs like 8.8.8.8, while another PC on the same network can. This points to a problem with the router's handling of traffic from this specific PC, not a general internet outage. A malfunctioning NAT (Network Address Translation) on the router could prevent this PC's outbound traffic from being translated to the public IP. Other possibilities include an ACL (Access Control List) on the router blocking traffic from this IP, or a full NAT table for the router. Since the gateway responds to pings, the default gateway and subnet mask are correctly configured on the PC.
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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