Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A user reports that their workstation can access internal network resources by IP address (e.g., \\192.168.1.100\share) and can browse the internet using IP addresses (e.g., http://8.8.8.8), but cannot access any resources by hostname (e.g., \\fileserver\share or www.example.com). Other workstations on the same subnet can resolve hostnames without issue. The workstation obtains its IP address via DHCP. The technician runs ipconfig and sees: IP: 192.168.1.105, Subnet Mask: 255.255.255.0, Default Gateway: 192.168.1.1, DNS Server: 192.168.1.1. 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 DNS resolver cache on the workstation is corrupted or contains invalid entries.
A corrupted DNS cache can prevent successful hostname resolution. Flushing the cache with 'ipconfig /flushdns' often resolves this issue. Since other devices work, the problem is isolated to this workstation's DNS caching behavior.
B
Distractor review
The DHCP scope is exhausted, and the workstation received an incorrect DNS server address.
If the DHCP scope were exhausted, the workstation would likely get an APIPA address (169.254.x.x). The workstation has a valid IP and the DNS server is set to 192.168.1.1, which is the same as other working devices.
C
Distractor review
NetBIOS over TCP/IP is disabled on the workstation, preventing NetBIOS name resolution.
NetBIOS name resolution is used for older Windows naming (e.g., \\computername). The user is having trouble with DNS hostnames (fileserver, www.example.com), which use DNS, not NetBIOS. Disabling NetBIOS does not affect DNS queries.
D
Distractor review
The workstation is in the wrong workgroup or domain, so it cannot resolve remote hostnames.
Workgroup and domain membership affect security and browsing scope but do not directly affect DNS resolution. A workstation can resolve hostnames regardless of its workgroup.
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 DNS resolver cache on the workstation is corrupted or contains invalid entries. — Since the workstation can reach resources by IP but not by hostname, the issue is name resolution. The DNS server is configured as 192.168.1.1, which is likely the router acting as a DNS forwarder. However, the workstation itself may be set to use an incorrect DNS suffix or may have a corrupted DNS cache. But given that other workstations work fine, the problem is likely local to this workstation. A corrupted DNS resolver cache can cause hostname resolution to fail even when other devices work. Flushing the DNS cache is a standard first step. Option A is correct. Option B (wrong DHCP scope) would affect other devices as well, and the workstation has a valid IP. Option C (disabled NetBIOS over TCP/IP) would affect NetBIOS name resolution but not DNS resolution; the user is trying to use hostnames (DNS), not NetBIOS names. Option D (incorrect workgroup) is unrelated to hostname resolution; it affects network browsing in Windows, not DNS queries.
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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