101 · Question #653
Which IP subnet mask can be used to send traffic to all network nodes?
The correct answer is D. 192.168.0.11/30. A broadcast address allows traffic to be sent to all hosts in a subnet. The address 192.168.0.11 is the broadcast address of the 192.168.0.8/30 network.
Question
Which IP subnet mask can be used to send traffic to all network nodes?
Options
- A192.168.0.255/23
- B192.168.1.11/31
- C172.16.1.255/22
- D192.168.0.11/30
How the community answered
(29 responses)- A3% (1)
- B7% (2)
- C14% (4)
- D76% (22)
Why each option
A broadcast address allows traffic to be sent to all hosts in a subnet. The address 192.168.0.11 is the broadcast address of the 192.168.0.8/30 network.
In the 192.168.0.0/23 subnet the broadcast address is 192.168.1.255, making 192.168.0.255 a valid host address rather than a broadcast address.
A /31 subnet is reserved for point-to-point links per RFC 3021 and contains no broadcast address by definition.
In the 172.16.0.0/22 subnet the broadcast address is 172.16.3.255, making 172.16.1.255 a valid host address rather than a broadcast address.
With a /30 prefix the subnet mask is 255.255.255.252, leaving 2 host bits. The 192.168.0.8/30 subnet contains addresses .8 (network), .9 and .10 (usable hosts), and .11 (broadcast). Because 192.168.0.11 is the broadcast address of this subnet, sending traffic to it delivers packets to all nodes within the network segment.
Concept tested: Identifying broadcast address from CIDR notation
Source: https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/tcpip-addressing-and-subnetting
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