Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A small office has 15 desktop computers connected to a single managed switch. The switch is connected to a router that provides DHCP and DNS services. Users report that they can access the internet but cannot communicate with each other using computer names (e.g., \\PC1). The technician verifies that all workstations are on the same subnet (192.168.1.0/24) and can successfully ping each other's IP addresses. Which of the following is the MOST likely cause of the 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
NetBIOS over TCP/IP is disabled on the workstations
NetBIOS over TCP/IP is used to resolve computer names in a local area network. If disabled, computers will not be able to translate NetBIOS names (e.g., computer names used in file sharing) to IP addresses, even though IP-level communication works.
B
Distractor review
The DNS server is not configured correctly
DNS is used for resolving internet hostnames, not typically for local NetBIOS names. Since users can access the internet, DNS is likely functioning. Moreover, ping by IP works, so DNS is not the primary issue for local name resolution.
C
Distractor review
Windows Firewall is blocking file and printer sharing
Windows Firewall could block certain traffic, but the fact that users can ping each other's IP addresses suggests basic network connectivity is allowed. Firewall settings typically do not block name resolution protocols like NetBIOS.
D
Distractor review
Workgroups are not configured the same on all computers
Different workgroup names may prevent computers from appearing in the Network list, but they would still be able to connect to shares using the full UNC path (\\PC1\share) or by pinging the IP. Name resolution via NetBIOS would still work regardless of 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: NetBIOS over TCP/IP is disabled on the workstations — When users can ping each other by IP but not by computer name, the problem is name resolution. In a typical small office, name resolution for Windows computer names relies on NetBIOS over TCP/IP or mDNS (LLMNR). If NetBIOS over TCP/IP is disabled on the workstations, they will not be able to resolve computer names to IP addresses, even though they can communicate by IP. The DNS server may be configured (option A) but unless the computer names are registered as DNS A records, DNS alone will not resolve them. Windows Firewall (option C) would block pings and other traffic, but pings succeed. Different workgroup names (option D) would prevent browsing in Network but would not prevent ping by IP; however, they could still resolve names via NetBIOS if enabled.
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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