Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
A technician configures a new workstation with a static IP address of 10.0.0.5, subnet mask 255.255.255.0, default gateway 10.0.0.1, and DNS server 8.8.8.8. The workstation can ping the gateway (10.0.0.1) but cannot ping any external IP addresses like 8.8.8.8 or access the internet. Other workstations on the same network using DHCP are working fine. The router's WAN connection is working. 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 IP address conflicts with another device on the network.
An IP conflict would cause intermittent connectivity, not a complete inability to reach external hosts while local gateway ping is successful. The problem is more systematic.
B
Distractor review
The default gateway is in a different subnet.
The workstation's IP 10.0.0.5 and gateway 10.0.0.1 are both in the 10.0.0.0/24 subnet, so the gateway is correctly configured from the workstation's perspective.
C
Best answer
The router is not configured with a route back to the 10.0.0.0 network.
The router's LAN interface is on a different subnet (e.g., 192.168.1.1/24). It receives packets from the workstation but does not have a return route to the 10.0.0.0 network, so responses are dropped. Adding a static route resolves the issue.
D
Distractor review
The DNS server is not reachable.
DNS is not required for pinging an IP address directly. The workstation can ping 8.8.8.8 (an IP) but cannot reach it, so DNS is not the issue.
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 is not configured with a route back to the 10.0.0.0 network. — The workstation can reach its gateway (10.0.0.1), so the issue is with routing beyond that. Because other DHCP clients are working, the router's LAN interface is likely on a different subnet (e.g., 192.168.1.1). The router does not have a route back to the 10.0.0.0/24 network, so when it receives traffic from the workstation, it cannot send replies. The workstation has a valid gateway address on the 10.0.0.0 network, but the router's LAN interface is not on that subnet, so traffic from the workstation reaches the router, but the router has no path back. IP address conflicts would cause intermittent issues, not total external connectivity failure. DNS being unreachable would not prevent ping to 8.8.8.8. The gateway is in the same subnet as the workstation, so that is correctly configured.
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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