JN0-102 · Question #288
Which two statements are true of a network mask? (Choose two.)
The correct answer is C. A subnet mask specifies the portion of an IP address that represents a network prefix. D. A subnet mask specifies the portion of an IP address that represents network hosts. A network mask fundamentally divides an IP address into two logical components: the network prefix, which identifies the specific network, and the host portion, which identifies individual devices within that network.
Question
Which two statements are true of a network mask? (Choose two.)
Options
- AA subnet mask specifies the portion of an IP address that is in a binary format.
- BA subnet mask specifies the portion of an IP address that is in a decimal format.
- CA subnet mask specifies the portion of an IP address that represents a network prefix.
- DA subnet mask specifies the portion of an IP address that represents network hosts.
How the community answered
(39 responses)- A5% (2)
- B8% (3)
- C87% (34)
Why each option
A network mask fundamentally divides an IP address into two logical components: the network prefix, which identifies the specific network, and the host portion, which identifies individual devices within that network.
A subnet mask defines the logical division of an IP address into network and host parts, not the format (binary) in which the IP address itself is represented.
A subnet mask defines the logical division of an IP address into network and host parts, not the format (decimal) in which the IP address itself is typically represented.
The bits represented by the '1's in a subnet mask explicitly define the network prefix portion of an IP address, which identifies the specific network segment.
The bits represented by the '0's in a subnet mask, immediately following the network prefix, designate the host portion of an IP address, which identifies individual devices within that network.
Concept tested: Components of IP addresses defined by a subnet mask
Source: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipaddr_dns/configuration/xe-3s/iad-xe-3s-book/iad-ipv4-addr-cfg.html
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