Microsoft Networking Essentials Exam IP Addressing & Subnetting 1 — Questions and Answers
Question 1: Which class of IPv4 address uses the range 192.168.0.0 to 192.168.255.255 as private address space?
- Class A
- Class B
- Class C (Correct answer)
- Class D
Correct answer: Class C
Class C private addresses fall in the range 192.168.0.0–192.168.255.255, as defined by RFC 1918.
Question 2: What is the default subnet mask for a Class B IP address?
- 255.0.0.0
- 255.255.0.0 (Correct answer)
- 255.255.255.0
- 255.255.255.128
Correct answer: 255.255.0.0
Class B addresses use a default subnet mask of 255.255.0.0, providing 65,534 usable host addresses per network.
Question 3: How many usable host addresses are available in a /28 subnet?
- 14 (Correct answer)
- 16
- 30
- 32
Correct answer: 14
A /28 subnet has 2^4 = 16 addresses, minus 2 (network and broadcast) = 14 usable hosts.
Question 4: Which notation is equivalent to the subnet mask 255.255.255.192?
- /24
- /25
- /26 (Correct answer)
- /27
Correct answer: /26
255.255.255.192 in binary is 11111111.11111111.11111111.11000000, which has 26 ones, equaling /26.
Question 5: What type of IPv4 address is 127.0.0.1?
- Multicast
- Broadcast
- Loopback (Correct answer)
- APIPA
Correct answer: Loopback
The address 127.0.0.1 is the loopback address, used to test the TCP/IP stack on the local machine.
Question 6: An IPv6 address is how many bits long?
- 32 bits
- 64 bits
- 128 bits (Correct answer)
- 256 bits
Correct answer: 128 bits
IPv6 addresses are 128 bits long, expressed as eight groups of four hexadecimal digits.
Question 7: Which address range is used by APIPA (Automatic Private IP Addressing) when a DHCP server is unreachable?
- 10.0.0.0/8
- 169.254.0.0/16 (Correct answer)
- 172.16.0.0/12
- 192.168.0.0/16
Correct answer: 169.254.0.0/16
APIPA assigns addresses in the 169.254.0.0/16 range when a DHCP server cannot be contacted.
Microsoft Networking Essentials Exam IP Addressing & Subnetting 1
Which class of IPv4 address uses the range 192.168.0.0 to 192.168.255.255 as private address space?