Q. How many usable hosts are available in a subnet with a /24 subnet mask?
A.
254
B.
256
C.
512
D.
128
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Solution
A /24 subnet mask allows for 256 total addresses, but 2 are reserved (network and broadcast), leaving 254 usable host addresses.
Correct Answer:
A
— 254
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Q. How many usable hosts are available in a subnet with a subnet mask of 255.255.255.240?
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Solution
A subnet mask of 255.255.255.240 allows for 16 total addresses, but 2 are reserved (network and broadcast), leaving 14 usable hosts.
Correct Answer:
A
— 14
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Q. In IP addressing, what does the term 'broadcast address' refer to?
A.
An address used to send data to all devices in a subnet
B.
An address assigned to a specific device
C.
An address that cannot be used
D.
An address for routing purposes
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Solution
The broadcast address is used to send data to all devices within a specific subnet.
Correct Answer:
A
— An address used to send data to all devices in a subnet
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Q. What is the CIDR notation for a subnet mask of 255.255.255.192?
A.
/24
B.
/26
C.
/28
D.
/30
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Solution
The CIDR notation for a subnet mask of 255.255.255.192 is /26, indicating 26 bits are used for the network part.
Correct Answer:
B
— /26
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Q. What is the default subnet mask for a Class C IP address?
A.
255.0.0.0
B.
255.255.0.0
C.
255.255.255.0
D.
255.255.255.255
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Solution
The default subnet mask for a Class C IP address is 255.255.255.0, allowing for 256 addresses in the subnet.
Correct Answer:
C
— 255.255.255.0
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Q. What is the maximum number of subnets that can be created from a Class B network using a /30 subnet mask?
A.
64
B.
128
C.
1024
D.
256
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Solution
Using a /30 subnet mask on a Class B network allows for 1024 subnets, as it borrows 2 bits from the host portion.
Correct Answer:
C
— 1024
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Q. What is the maximum number of subnets that can be created from a Class B network with a subnet mask of 255.255.255.0?
A.
2
B.
16
C.
256
D.
1024
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Solution
Using a subnet mask of 255.255.255.0 on a Class B network allows for 256 subnets.
Correct Answer:
C
— 256
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Q. What is the purpose of subnetting in IP addressing?
A.
To increase the number of available IP addresses
B.
To improve network performance and security
C.
To simplify routing
D.
To enable NAT
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Solution
Subnetting divides a larger network into smaller, manageable segments, improving performance and security by limiting broadcast domains.
Correct Answer:
B
— To improve network performance and security
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Q. What is the purpose of the network portion of an IP address?
A.
To identify the specific device on the network
B.
To identify the network to which the device belongs
C.
To provide error control
D.
To facilitate data transmission
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Solution
The network portion of an IP address identifies the specific network to which the device belongs.
Correct Answer:
B
— To identify the network to which the device belongs
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Q. What is the range of valid host addresses in the subnet 192.168.1.0/24?
A.
192.168.1.1 to 192.168.1.254
B.
192.168.1.0 to 192.168.1.255
C.
192.168.1.0 to 192.168.1.254
D.
192.168.1.1 to 192.168.1.255
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Solution
In the subnet 192.168.1.0/24, the valid host addresses range from 192.168.1.1 to 192.168.1.254, as 192.168.1.0 is the network address and 192.168.1.255 is the broadcast address.
Correct Answer:
A
— 192.168.1.1 to 192.168.1.254
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Q. Which of the following IP addresses is a valid private IP address?
A.
192.168.1.1
B.
172.16.0.1
C.
10.0.0.1
D.
All of the above
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Solution
All listed IP addresses are valid private IP addresses as defined by RFC 1918.
Correct Answer:
D
— All of the above
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Q. Which of the following is NOT a valid IPv4 address?
A.
192.168.1.1
B.
256.100.50.25
C.
10.0.0.1
D.
172.16.0.5
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Solution
The address 256.100.50.25 is invalid because the octets in an IPv4 address must be between 0 and 255.
Correct Answer:
B
— 256.100.50.25
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Q. Which of the following is NOT a valid subnet mask?
A.
255.255.255.0
B.
255.255.255.128
C.
255.255.255.256
D.
255.255.255.192
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Solution
A subnet mask cannot have a value greater than 255 in any octet, making 255.255.255.256 invalid.
Correct Answer:
C
— 255.255.255.256
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Showing 1 to 13 of 13 (1 Pages)
