What is the subnet mask for a 9?
Class A
| Network Bits | Subnet Mask | Number of Hosts |
|---|---|---|
| /8 | 255.0.0.0 | 16777214 |
| /9 | 255.128.0.0 | 8388606 |
| /10 | 255.192.0.0 | 4194302 |
| /11 | 255.224.0.0 | 2097150 |
How do you calculate subnet mask in binary?
For every host-bit we borrow we can double the number of subnets we can create, so by borrowing 2 host bits we can create 4 subnets. Every host bit you “borrow” doubles the amount of subnets you can create. Calculate it from binary to decimal: 128+64 = 192. The new subnet mask will be 255.255.
What does subnet mask 255.255 255.0 tell a router?
Answer: A subnet mask of 255.255. 255.0 allows for close to 256 unique hosts within the network (since not all 256 IP addresses can be used). This is the default subnet mask used by Class B networks and provides up to 65,536 IP addresses (256 x 256).
What is subnet mask used for?
A subnet mask is used to divide an IP address into two parts. One part identifies the host (computer), the other part identifies the network to which it belongs.
How do I choose a subnet mask?
To calculate the subnet mask, convert an IP address to binary, perform the calculation and then convert back to the IPv4 decimal number representation known as a dotted quad. The same subnetting procedure works for IPv6 addresses.
What are the functions of subnet mask?
The function of a subnet mask is to extract the network ID portion of an IP destination address and determine whether an IP address exists on the local network or whether it must be routed outside the local network. If the extracted network ID matches the local network ID, the destination is located on the local network.
What is the difference between a subnet and a subnet mask?
A subnet is a range of addresses which are valid hosts on the same network. Subnet and network range are synonyms. A subnet mask is an obsolete term for “network mask”. “subnet” no longer exists. It is a leftover from classful days. “network” can be used in place of “subnet” for almost all uses (if not all).
What is the purpose of the subnet mask?
Subnet mask. Short for subnetwork mask, a subnet mask is data used for bitwise operations on a network of IP addresses that is divided into two or more groups.
Why it is called a subnet mask?
The goal of subnet masks are simply to enable the subnetting process. The phrase “mask” is applied because the subnet mask essentially uses its own 32-bit number to mask the IP address. A 32-bit IP address uniquely identifies a single device on an IP network.