Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A technician sets up a small office network. The router is configured with DHCP providing addresses in the 192.168.1.0/24 range. A new employee's laptop obtains an IP address of 192.168.1.50, subnet mask 255.255.255.0, and default gateway 192.168.1.1. The laptop can ping other local workstations and the router (192.168.1.1), but cannot access any external websites by domain name or IP address. Which of the following is the MOST likely cause of this 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
The laptop's DNS server configuration is incorrect.
Incorrect DNS settings would prevent the laptop from resolving domain names to IP addresses, but the user reports that they cannot access websites by IP address either. This indicates the problem is not DNS-related, as DNS is only needed for name resolution.
B
Distractor review
The default gateway is not set correctly on the laptop.
The laptop can ping the default gateway (192.168.1.1), which proves that the laptop has a valid gateway address and can communicate with it. If the gateway were misconfigured, the ping to 192.168.1.1 would fail.
C
Best answer
The router's WAN connection is not properly configured or is down.
If the router's WAN interface does not have a valid internet connection or the default route (0.0.0.0/0) is missing, traffic cannot exit the local network. The laptop's ability to ping the router's LAN IP does not confirm that the router can forward traffic to the internet. This is the most common cause when local connectivity works but external access fails.
D
Distractor review
A firewall on the router is blocking all outbound traffic from the laptop.
While a firewall could block external access, it typically blocks specific ports or protocols, not all traffic to all external IP addresses. If it blocked all outbound traffic, the laptop would likely not be able to reach any external IP, but the scenario says the user cannot access websites by IP, which could still be consistent. However, the more likely and simple explanation is a WAN issue, as firewalls usually have some exceptions or allow basic connectivity by default.
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 WAN connection is not properly configured or is down. — Since the laptop can successfully ping the default gateway and other local devices, its Layer 2 and Layer 3 connectivity within the local network is working. The inability to reach external sites indicates a problem with routing beyond the local network or with name resolution. Because the user cannot access sites by IP address either, the issue is not DNS-related (DNS would affect only name resolution). The problem is most likely that the router's default route to the ISP is misconfigured or the WAN connection is down, preventing traffic from leaving the local subnet. The firewall could also block outbound traffic, but that would typically affect only certain ports or protocols, not all external IP addresses. The subnet mask is correctly set, and the gateway is reachable.
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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