Q. In CIDR notation, what does a /22 subnet mask indicate?
-
A.
255.255.252.0
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B.
255.255.255.0
-
C.
255.255.255.252
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D.
255.255.255.128
Solution
A /22 subnet mask corresponds to 255.255.252.0, allowing for 1024 IP addresses in the subnet.
Correct Answer:
A
— 255.255.252.0
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Q. What is the CIDR notation for a subnet mask of 255.255.255.224?
-
A.
/24
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B.
/25
-
C.
/26
-
D.
/27
Solution
The subnet mask 255.255.255.224 corresponds to a CIDR notation of /27, which means 27 bits are used for the network part.
Correct Answer:
D
— /27
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Q. What is the first usable IP address in the subnet 10.0.0.0/24?
-
A.
10.0.0.0
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B.
10.0.0.1
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C.
10.0.0.255
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D.
10.0.1.0
Solution
The first usable IP address in the subnet 10.0.0.0/24 is 10.0.0.1, as 10.0.0.0 is the network address.
Correct Answer:
B
— 10.0.0.1
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Q. What is the first valid host address in the subnet 192.168.1.0/24?
-
A.
192.168.1.0
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B.
192.168.1.1
-
C.
192.168.1.255
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D.
192.168.1.254
Solution
In the subnet 192.168.1.0/24, the first valid host address is 192.168.1.1, as 192.168.1.0 is the network address.
Correct Answer:
B
— 192.168.1.1
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Q. What is the last valid host address in the subnet 10.0.0.0/8?
-
A.
10.0.0.255
-
B.
10.255.255.254
-
C.
10.0.0.0
-
D.
10.255.255.255
Solution
In the subnet 10.0.0.0/8, the last valid host address is 10.255.255.254, as 10.255.255.255 is the broadcast address.
Correct Answer:
B
— 10.255.255.254
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Q. What is the maximum number of hosts that can be addressed in a subnet with a /27 prefix?
Solution
A /27 subnet provides 32 IP addresses, but 2 are reserved (network and broadcast), allowing for 30 usable hosts.
Correct Answer:
A
— 30
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Q. What is the purpose of the default gateway in a network?
-
A.
To connect to the internet
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B.
To route traffic between subnets
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C.
To provide DHCP services
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D.
To act as a firewall
Solution
The default gateway routes traffic from a local network to destinations outside that network, typically between subnets.
Correct Answer:
B
— To route traffic between subnets
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