Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A technician connects a new workstation to a wall jack in an office. The link lights on both the workstation's NIC and the switch port are solid green. The workstation cannot obtain an IP address via DHCP. The technician manually assigns a static IP address in the same subnet as other working workstations (192.168.1.100/24, gateway 192.168.1.1), but the workstation still cannot ping the gateway or any other device on the network. Other workstations connected to the same switch can access network resources normally. 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
Best answer
The switch port has port security enabled, and the workstation's MAC address is not allowed
Port security configured on the switch port will block traffic from unauthorized MAC addresses, preventing all Layer 2 and Layer 3 communication even though the link lights indicate a connection.
B
Distractor review
The IP address 192.168.1.100 is already in use by another device
A duplicate IP address would cause an IP conflict message, but the workstation would still be able to send and receive some traffic, and other devices on the network would also experience issues. This does not explain a total lack of connectivity.
C
Distractor review
The Ethernet cable is faulty
A faulty cable typically causes link lights to be off or intermittent. Since both link lights are solid green, the cable is likely good.
D
Distractor review
The DHCP server has exhausted its IP address pool
An exhausted DHCP pool would prevent automatic IP assignment, but assigning a static IP should allow communication. Since the static IP also fails, the problem is not DHCP-related.
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 switch port has port security enabled, and the workstation's MAC address is not allowed — The link lights are on, indicating physical connectivity at Layer 1. However, the workstation cannot communicate at Layer 3 even with a valid static IP. Since other devices on the same switch work fine, the issue is isolated to this specific switch port or the workstation itself. The most likely cause is that the switch port has port security enabled, which restricts traffic based on the MAC address. The new workstation's MAC address is not in the allowed list, so the switch drops all traffic from that port even though the link is up. This explains why DHCP fails and static configuration also fails. A defective cable is unlikely because link lights are solid. A duplicate IP would cause a conflict message but not a complete inability to ping. An exhausted DHCP pool would not prevent static IP communication.
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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