IPv4 & IPv6 Addressing Exam 2026-2027:
110 Multiple-Choice Questions on
Subnetting, CIDR, VLSM, Binary
Conversion, DHCP, DNS, and Network
Troubleshooting — University-Level Practice
for High Scores
Description:
Master IPv4 and IPv6 addressing with 110 exam-style questions covering subnetting, CIDR,
VLSM, binary conversion, DHCP, DNS, private ranges, and transition technologies.
Detailed answers and explanations included.
Download the complete 2026-2027 examination paper and ace your networking certification or
university exam today.
, IPv4 & IPv6 Exam Prep 2026-2027
Instructions to Candidates
This examination consists of multiple-choice questions covering fundamental concepts of IP
addressing, subnetting, and network protocols. Answer all questions. Each question carries equal
marks. Choose the most appropriate answer for each question.
Section A: IPv4 Addressing Fundamentals
Question 1
An IPv4 address is best described as:
A. A 64-bit hexadecimal number assigned to network interfaces
B. A 32-bit binary number assigned to devices on a TCP/IP network
C. A 128-bit alphanumeric string used for network identification
D. A 16-bit decimal value representing network location
Answer: B
Explanation: An IPv4 address is a 32-bit binary number, typically expressed in dotted-decimal
notation (four octets separated by dots), uniquely identifying devices on a TCP/IP network.
Question 2
Which of the following correctly represents a valid IPv4 address in dotted-decimal notation?
A. 172.21.243.67
B. 172.256.243.67
C. 172.21.243
D. 172.21.243.67.89
Answer: A
,Explanation: Valid IPv4 addresses consist of exactly four decimal numbers, each ranging from
0 to 255, separated by dots. Option A meets these criteria while the others contain invalid values
or incorrect formatting.
Question 3
What is the first octet range for Class A IPv4 addresses?
A. 128 to 191
B. 192 to 223
C. 1 to 126
D. 224 to 239
Answer: C
Explanation: Class A IPv4 addresses have a first octet value ranging from 1 to 126. Class B
ranges from 128 to 191, Class C from 192 to 223, and Class D from 224 to 239.
Question 4
Which IP address is reserved for loopback functionality?
A. 0.0.0.0
B. 255.255.255.255
C. 127.0.0.1
D. 169.254.0.1
Answer: C
Explanation: The address 127.0.0.1 is designated as the loopback address, allowing a device to
send network traffic to itself for testing and diagnostic purposes without requiring physical
network hardware.
, Question 5
Which organization globally manages publicly routable IP addresses?
A. IEEE
B. IETF
C. ICANN
D. ISO
Answer: C
Explanation: The Internet Corporation for Assigned Names and Numbers (ICANN) is
responsible for global coordination of the IP address space, including the allocation of publicly
routable IP addresses to regional registries.
Section B: Private IP Addressing and Special Address Ranges
Question 6
Which of the following is a Class B private IP address range?
A. 10.0.0.0 to 10.255.255.255
B. 172.16.0.0 to 172.31.255.255
C. 192.168.0.0 to 192.168.255.255
D. 169.254.0.0 to 169.254.255.255
Answer: B
Explanation: The Class B private address range is 172.16.0.0 through 172.31.255.255. Option A
is Class A private, option C is Class C private, and option D is the APIPA range.
Question 7
What does the APIPA range (169.254.0.0 to 169.254.255.255) indicate?
A. Addresses reserved for multicast communication
B. Addresses assigned when a DHCP server is unavailable
110 Multiple-Choice Questions on
Subnetting, CIDR, VLSM, Binary
Conversion, DHCP, DNS, and Network
Troubleshooting — University-Level Practice
for High Scores
Description:
Master IPv4 and IPv6 addressing with 110 exam-style questions covering subnetting, CIDR,
VLSM, binary conversion, DHCP, DNS, private ranges, and transition technologies.
Detailed answers and explanations included.
Download the complete 2026-2027 examination paper and ace your networking certification or
university exam today.
, IPv4 & IPv6 Exam Prep 2026-2027
Instructions to Candidates
This examination consists of multiple-choice questions covering fundamental concepts of IP
addressing, subnetting, and network protocols. Answer all questions. Each question carries equal
marks. Choose the most appropriate answer for each question.
Section A: IPv4 Addressing Fundamentals
Question 1
An IPv4 address is best described as:
A. A 64-bit hexadecimal number assigned to network interfaces
B. A 32-bit binary number assigned to devices on a TCP/IP network
C. A 128-bit alphanumeric string used for network identification
D. A 16-bit decimal value representing network location
Answer: B
Explanation: An IPv4 address is a 32-bit binary number, typically expressed in dotted-decimal
notation (four octets separated by dots), uniquely identifying devices on a TCP/IP network.
Question 2
Which of the following correctly represents a valid IPv4 address in dotted-decimal notation?
A. 172.21.243.67
B. 172.256.243.67
C. 172.21.243
D. 172.21.243.67.89
Answer: A
,Explanation: Valid IPv4 addresses consist of exactly four decimal numbers, each ranging from
0 to 255, separated by dots. Option A meets these criteria while the others contain invalid values
or incorrect formatting.
Question 3
What is the first octet range for Class A IPv4 addresses?
A. 128 to 191
B. 192 to 223
C. 1 to 126
D. 224 to 239
Answer: C
Explanation: Class A IPv4 addresses have a first octet value ranging from 1 to 126. Class B
ranges from 128 to 191, Class C from 192 to 223, and Class D from 224 to 239.
Question 4
Which IP address is reserved for loopback functionality?
A. 0.0.0.0
B. 255.255.255.255
C. 127.0.0.1
D. 169.254.0.1
Answer: C
Explanation: The address 127.0.0.1 is designated as the loopback address, allowing a device to
send network traffic to itself for testing and diagnostic purposes without requiring physical
network hardware.
, Question 5
Which organization globally manages publicly routable IP addresses?
A. IEEE
B. IETF
C. ICANN
D. ISO
Answer: C
Explanation: The Internet Corporation for Assigned Names and Numbers (ICANN) is
responsible for global coordination of the IP address space, including the allocation of publicly
routable IP addresses to regional registries.
Section B: Private IP Addressing and Special Address Ranges
Question 6
Which of the following is a Class B private IP address range?
A. 10.0.0.0 to 10.255.255.255
B. 172.16.0.0 to 172.31.255.255
C. 192.168.0.0 to 192.168.255.255
D. 169.254.0.0 to 169.254.255.255
Answer: B
Explanation: The Class B private address range is 172.16.0.0 through 172.31.255.255. Option A
is Class A private, option C is Class C private, and option D is the APIPA range.
Question 7
What does the APIPA range (169.254.0.0 to 169.254.255.255) indicate?
A. Addresses reserved for multicast communication
B. Addresses assigned when a DHCP server is unavailable
