NETWORK LAYER
NEXT GENERATION IP
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Question
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What is a subnet mask?
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A tool used for hacking into networks
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A 32-bit number used to divide an IP address into a network address and host address
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A security feature used to prevent unauthorised access to a network
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A tool used for monitoring network traffic
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Explanation:
Detailed explanation-1: -A subnet mask is a four-octet number used to identify the network ID portion of a 32-bit IP address. A subnet mask is required on all class-based networks, even on networks that are not subnetted.
Detailed explanation-2: -The IPv4 address is a 32-bit number that uniquely identifies a network interface on a machine. An IPv4 address is typically written in decimal digits, formatted as four 8-bit fields that are separated by periods. Each 8-bit field represents a byte of the IPv4 address.
Detailed explanation-3: -A class C network would have a subnet mask of 255.255. 255.0 which means that 24 bits are used for the network. In CIDR notation this is designated by a /24 following the IP address.
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