Question: In CIDR notation, what does /16 signify?
Options:
255.255.0.0 subnet mask
65,536 possible addresses
A Class B network
All of the above
Correct Answer: All of the above
Solution:
CIDR notation /16 indicates a subnet mask of 255.255.0.0, allowing for 65,536 possible addresses, typically associated with Class B networks.
In CIDR notation, what does /16 signify?
Practice Questions
Q1
In CIDR notation, what does /16 signify?
255.255.0.0 subnet mask
65,536 possible addresses
A Class B network
All of the above
Questions & Step-by-Step Solutions
In CIDR notation, what does /16 signify?
Step 1: Understand what CIDR stands for. CIDR means Classless Inter-Domain Routing.
Step 2: Recognize that CIDR notation is a way to represent IP addresses and their associated subnet masks.
Step 3: The '/16' in CIDR notation indicates how many bits are used for the network part of the address.
Step 4: In this case, '/16' means that the first 16 bits of the IP address are used for the network.
Step 5: The remaining bits (32 total bits in an IPv4 address - 16 bits for the network = 16 bits for hosts) can be used for individual devices (hosts) on that network.
Step 6: A subnet mask of /16 corresponds to 255.255.0.0, which is used to separate the network part from the host part of the IP address.
Step 7: With a /16 subnet mask, there are 2^16 (or 65,536) possible addresses available in that network.
CIDR Notation – CIDR (Classless Inter-Domain Routing) notation is a method for allocating IP addresses and IP routing that uses a suffix to indicate the number of bits in the subnet mask.
Subnet Mask – A subnet mask is a 32-bit number that divides an IP address into network and host portions, determining how many addresses are available in a subnet.
Classful Networking – Classful networking refers to the traditional classification of IP addresses into classes (A, B, C) based on fixed subnet masks.
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