Classful Subnetting
when we start talking IPv4 subnetting, you'll often hear about what which different classes?
class A, class B, and class C IP subnets.
what does a subnet mask do?
a subnet mask is used to divide an ip address into network and host portions.
How many usable host IP addresses are in a /28 subnet?
In a /28 subnet, there are 14 usable host IP addresses.
What is the magic number in subnetting?
The magic number is the value by which network addresses must be incremented in order to determine the range of IP addresses in a subnet.
what is the defualt subnet mask for a class a network?
255.0.0.0
what is the default subnet mask for a class C IP address?
the default subnet mask for a class C IP address is 255.255.255.0
What is the subnet mask for a /27 subnet?
The subnet mask for a /27 subnet is 255.255.255.224 2.
How is the magic number derived in subnetting?
The magic number is derived by subtracting the subnet mask value from 255.
how many hosts can you have per subnet?
65,534 hots
what is the purpose of subnetting?
subnetting allows for the division of a single network into multiple smaller network, which helps in optimizing network performance and managing network traffic more efficiently.
What is the network address for the IP address 192.168.1.135/25?
The network address for 192.168.1.135/25 is 192.168.1.128 4.
What is the significance of the magic number in subnetting?
The magic number helps in determining the network address, broadcast address, and host range within a subnet.
what is the network range a class C network with a subnet mask of 255.255.255.0?
192.168.1.0-192.168.1.255
how does subnetting help in reducing network congestion?
by diving a large network into smaller subnet, subnetting helps reduce the amount of broadcast traffic and improves network efficiency by limiting the scope of broadcast to specific subnets.
How many subnets can be created from a /24 subnet using the variable-length subnet mask (VLSM) technique?
Using VLSM, a /24 subnet can be divided into 256 subnets.
How is the network address calculated using the magic number?
The network address is calculated by finding the next lower multiple of the magic number starting from the given IP address.
how many bits are used for the network portion in a class A network?
8 bits
how many host are available in a subnet with a subnet mask of 255.255.255.224?
a subnet mask of 255.255.255.224 provides 30 host addresses.
If a network has a subnet mask of 255.255.255.192, how many host IP addresses are available in each subnet?
With a subnet mask of 255.255.255.192, there are 62 host IP addresses available in each subnet.
How is the host range calculated using the magic number?
The host range is calculated by taking the network address and incrementing it by the magic number to find the first usable IP address, and then subtracting 1 from the broadcast address to find the last usable IP address in the subnet.