COMPTIA INFRASTRUCTURE SPECIALIST
CERTIFICATION EXAM WITH QUESTIONS
AND VERIFIED ANSWERS, PLUS DETAILED
RATIONALES/EXPERT VERIFIED FOR
GUARANTEED PASS 2026/LATEST
UPDATE/INSTANT DOWNLOAD PDF
1. A company is deploying a new server that will host several virtual
machines. The server has two physical CPUs, 256 GB of RAM,
redundant power supplies, and multiple high-speed network
interfaces. The organization wants to ensure that the failure of a
single physical component does not immediately bring down the
virtualized workloads. Which design principle BEST addresses this
requirement?
A. Scalability
B. Fault tolerance
C. Compression
D. Deduplication
Answer: B. Fault tolerance
Rationale: Fault tolerance is the ability of a system to continue
operating when one or more components fail. Redundant power
supplies, redundant network interfaces, multiple storage paths, RAID,
and other redundant components are examples of fault-tolerant
design. Scalability concerns increasing capacity, while compression
and deduplication primarily address storage efficiency.
2. A network administrator needs to divide a physical Ethernet
switch into several logically isolated broadcast domains without
1
,purchasing additional physical switches. Which technology should
be implemented?
A. NAT
B. VLAN
C. DHCP
D. DNS
Answer: B. VLAN
Rationale: A VLAN, or Virtual Local Area Network, logically
separates devices into different Layer 2 broadcast domains on the
same physical switching infrastructure. VLANs are commonly used to
separate departments, servers, voice traffic, guest networks, and
management traffic. NAT translates addresses, DHCP provides IP
configuration, and DNS resolves names.
3. A server administrator wants storage redundancy. Four disks are
available, and the organization wants to tolerate the failure of one
disk while maintaining usable storage capacity. Which RAID level is
MOST appropriate?
A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 10
Answer: C. RAID 5
Rationale: RAID 5 uses block-level striping with distributed parity and
can tolerate the failure of one disk. RAID 0 provides no fault
tolerance. RAID 1 mirrors data and normally requires pairs of disks.
RAID 10 provides excellent performance and redundancy but requires
at least four disks and sacrifices approximately 50% of raw capacity.
2
,4. An organization requires extremely fast storage performance and
is willing to sacrifice redundancy because all data can be
reconstructed from another system. Which RAID level provides
striping without parity or mirroring?
A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 6
Answer: A. RAID 0
Rationale: RAID 0 distributes data across multiple disks through
striping, increasing performance and usable capacity. However, RAID
0 has no redundancy. Failure of one disk can cause the entire array to
become unusable. RAID 1 uses mirroring, while RAID 5 and RAID 6
use parity.
5. A technician receives a report that users can access an application
using its IP address but cannot access it using its hostname. The
server itself is operational. Which service should the technician
investigate FIRST?
A. DHCP
B. DNS
C. NTP
D. FTP
Answer: B. DNS
Rationale: DNS translates human-readable hostnames into IP
addresses. If direct IP connectivity works but hostname resolution
fails, DNS is the logical first area to investigate. DHCP provides
addressing information, NTP synchronizes time, and FTP transfers
files.
3
, 6. A company has deployed IPv6 throughout its infrastructure.
Which address below represents a valid IPv6 address?
A. 192.168.10.25
B. 10.0.0.1
C. 2001:db8:1234:5678::10
D. 255.255.255.0
Answer: C. 2001:db8:1234:5678::10
Rationale: IPv6 uses 128-bit addresses represented using hexadecimal
groups separated by colons. The double colon represents one or more
groups of consecutive zeros. IPv4 addresses use dotted-decimal
notation and contain 32 bits.
7. A network contains 500 workstations. The administrator wants to
prevent all hosts from sharing the same broadcast domain and
needs logical segmentation for security and performance. Which
solution is MOST appropriate?
A. Increase the MTU
B. Implement VLANs
C. Replace TCP with UDP
D. Disable DNS
Answer: B. Implement VLANs
Rationale: VLANs create separate Layer 2 broadcast domains while
allowing the organization to use the same physical switching
infrastructure. Inter-VLAN communication can then be controlled
through a Layer 3 device such as a router or Layer 3 switch.
4
CERTIFICATION EXAM WITH QUESTIONS
AND VERIFIED ANSWERS, PLUS DETAILED
RATIONALES/EXPERT VERIFIED FOR
GUARANTEED PASS 2026/LATEST
UPDATE/INSTANT DOWNLOAD PDF
1. A company is deploying a new server that will host several virtual
machines. The server has two physical CPUs, 256 GB of RAM,
redundant power supplies, and multiple high-speed network
interfaces. The organization wants to ensure that the failure of a
single physical component does not immediately bring down the
virtualized workloads. Which design principle BEST addresses this
requirement?
A. Scalability
B. Fault tolerance
C. Compression
D. Deduplication
Answer: B. Fault tolerance
Rationale: Fault tolerance is the ability of a system to continue
operating when one or more components fail. Redundant power
supplies, redundant network interfaces, multiple storage paths, RAID,
and other redundant components are examples of fault-tolerant
design. Scalability concerns increasing capacity, while compression
and deduplication primarily address storage efficiency.
2. A network administrator needs to divide a physical Ethernet
switch into several logically isolated broadcast domains without
1
,purchasing additional physical switches. Which technology should
be implemented?
A. NAT
B. VLAN
C. DHCP
D. DNS
Answer: B. VLAN
Rationale: A VLAN, or Virtual Local Area Network, logically
separates devices into different Layer 2 broadcast domains on the
same physical switching infrastructure. VLANs are commonly used to
separate departments, servers, voice traffic, guest networks, and
management traffic. NAT translates addresses, DHCP provides IP
configuration, and DNS resolves names.
3. A server administrator wants storage redundancy. Four disks are
available, and the organization wants to tolerate the failure of one
disk while maintaining usable storage capacity. Which RAID level is
MOST appropriate?
A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 10
Answer: C. RAID 5
Rationale: RAID 5 uses block-level striping with distributed parity and
can tolerate the failure of one disk. RAID 0 provides no fault
tolerance. RAID 1 mirrors data and normally requires pairs of disks.
RAID 10 provides excellent performance and redundancy but requires
at least four disks and sacrifices approximately 50% of raw capacity.
2
,4. An organization requires extremely fast storage performance and
is willing to sacrifice redundancy because all data can be
reconstructed from another system. Which RAID level provides
striping without parity or mirroring?
A. RAID 0
B. RAID 1
C. RAID 5
D. RAID 6
Answer: A. RAID 0
Rationale: RAID 0 distributes data across multiple disks through
striping, increasing performance and usable capacity. However, RAID
0 has no redundancy. Failure of one disk can cause the entire array to
become unusable. RAID 1 uses mirroring, while RAID 5 and RAID 6
use parity.
5. A technician receives a report that users can access an application
using its IP address but cannot access it using its hostname. The
server itself is operational. Which service should the technician
investigate FIRST?
A. DHCP
B. DNS
C. NTP
D. FTP
Answer: B. DNS
Rationale: DNS translates human-readable hostnames into IP
addresses. If direct IP connectivity works but hostname resolution
fails, DNS is the logical first area to investigate. DHCP provides
addressing information, NTP synchronizes time, and FTP transfers
files.
3
, 6. A company has deployed IPv6 throughout its infrastructure.
Which address below represents a valid IPv6 address?
A. 192.168.10.25
B. 10.0.0.1
C. 2001:db8:1234:5678::10
D. 255.255.255.0
Answer: C. 2001:db8:1234:5678::10
Rationale: IPv6 uses 128-bit addresses represented using hexadecimal
groups separated by colons. The double colon represents one or more
groups of consecutive zeros. IPv4 addresses use dotted-decimal
notation and contain 32 bits.
7. A network contains 500 workstations. The administrator wants to
prevent all hosts from sharing the same broadcast domain and
needs logical segmentation for security and performance. Which
solution is MOST appropriate?
A. Increase the MTU
B. Implement VLANs
C. Replace TCP with UDP
D. Disable DNS
Answer: B. Implement VLANs
Rationale: VLANs create separate Layer 2 broadcast domains while
allowing the organization to use the same physical switching
infrastructure. Inter-VLAN communication can then be controlled
through a Layer 3 device such as a router or Layer 3 switch.
4
