CompTIA Network+ Certification Practice Test

Free 5-question sample test with instant feedback. See how ready you are.

Loading quiz...

Sample Questions

Question 1

How many bits are in an IPv4 address, and how is it written?

Answer: An IPv4 address is 32 bits long, written as four decimal octets separated by dots (dotted-decimal notation), e.g., 192.168.1.1.

Question 2

What is the default subnet mask for a Class A network?

Answer: The default subnet mask for a Class A network is 255.0.0.0 (/8), leaving 24 bits for host addresses.

Question 3

What is the default subnet mask for a Class B network?

Answer: The default subnet mask for a Class B network is 255.255.0.0 (/16), leaving 16 bits for host addresses.

Question 4

What is the default subnet mask for a Class C network?

Answer: The default subnet mask for a Class C network is 255.255.255.0 (/24), leaving 8 bits for host addresses.

Question 5

What is the valid range of first-octet values for a Class A IP address?

Answer: Class A addresses have a first-octet range of 1–126. The address 127.x.x.x is reserved for loopback.