Question 1: What is a router?

Your Answer

A. A layer 3 device that forwards and receives traffic based on IP address.

B. A layer 2 devices that forwards and receives traffic based on MAC address

C. They are used by applications and servers to correctly route requests and responses to the right program.

D. When someone uses a device to impersonate an IP address

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Question 2: What is the network mask for a /25?

Your Answer

A. 255.255.255.254

B. 255.255.255.127

C. 255.255.255.128

D. 255.255.255.63

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Question 3: How many hosts/IP addresses does a network with a subnet mask of 255.255.255.0 have?

Your Answer

A. 256 total

B. 128, though the first and last address in the range are reserved for the network and the broadcast address.

C. 256, though the last two addresses in the range are reserved for the network and the broadcast address, for a total of 254.

D. 256, though the first and last address in the range are reserved for the network and the broadcast address, and one address must be used for the default gateway, for a total of 253.

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Question 4: How many IPV4 addresses exist?

Your Answer

A. 16,777,214 (16.8 million rounding up)

B. 255,000,000,000

C. 2,147,483,648 (or 2.2 billion, rounding up)

D. 4,294,967,296 (or 4.3 billion, rounding up)

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Question 5: What does a subnet mask tell you?

Your Answer

A. The ports you can connect to.

B. It tells you what part of an IP address is the network portion (the 1's) and which is the host portion (the 0's).

C. It tells you which DNS you can use to resolve your IP.

D. It tells you which version of NAT (network address translation) your device is using.

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Question 6: What is the range for class A addresses?

Your Answer

A. 192.0.0.0 - 223.255.255.0

B. 240.0.0.0 - 255.255.255.255

C. Class A addresses no longer exist after IPV6 was introduced

D. 1.0.0.0 - 126.255.255.255

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Question 7: A private IPV4 address cannot be routed through the internet.

Your Answer

A. True

B. Technically true, but these can be routed through the internet by using NAT

C. False

D. Technically false, but only when a firewall is enabled on your network

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Question 8: What is the local loopback address range?

Your Answer

A. 255.255.0.0 - 255.255.255.255

B. 10.0.0.0 - 10.255.255.255

C. 172.0.0.0 - 172.0.0.0

D. 127.0.0.0 - 127.255.255.255

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Question 9: What is 192.168.0.1 in binary?

Your Answer

A. 11000000.10101000.00000000.00000001

B. 00000011.00010101.00000000.10000000

C. 10111100.10101000.00000000.00000001

D. 11000000.10101000.0.00000001

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Question 10: What port does HTTPS use?

Your Answer

A. 80

B. 255

C. 127

D. 445

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