CV0-002 · Question #175
A technician needs to configure a virtual NIC on a Class A IP address network. Which of the following is the default subnet mask for this network?
The correct answer is A. /8. The default subnet mask for a Class A IP address network is /8, which translates to 255.0.0.0.
Question
A technician needs to configure a virtual NIC on a Class A IP address network. Which of the following is the default subnet mask for this network?
Options
- A/8
- B/16
- C/24
- D/28
How the community answered
(30 responses)- A93% (28)
- C3% (1)
- D3% (1)
Why each option
The default subnet mask for a Class A IP address network is /8, which translates to 255.0.0.0.
In traditional classful IP addressing, Class A networks are defined by their first octet ranging from 1-126. The default subnet mask for a Class A network uses the first 8 bits for the network portion, represented as /8 in CIDR notation, meaning 255.0.0.0.
/16 is the default subnet mask for a Class B IP address network, not a Class A network.
/24 is the default subnet mask for a Class C IP address network, not a Class A network.
/28 represents a subnet mask of 255.255.255.240 and is a custom subnet mask, not a default for any classful network.
Concept tested: Classful IP addressing - default subnet masks
Source: https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-2000-server/cc957861(v=technet.10)?redirectedfrom=MSDN
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