right immediately i am sitting in a cisco class and i am totally lost-- given the ip field of 192.168.0 create 5 subnets
Calculate subnets:
1 192.168.1.0 192.168.1.00000000
2 192.168.1.32 192.168.1.00100000
3 192.168.1.64 192.168.1.01000000
4 192.168.1.96 192.168.1.01100000
5 192.168.1.128 192.168.1.10000000
6 192.168.1.160 192.168.1.10100000
7 192.168.1.192 192.168.1.11000000
8 192.168.1.224 192.168.1.11100000
Note: the first and ultimate subnets are invalid.
why cany you use the first n final sectioins and what is a subnet broadcast?>
Answers:
To create 5 subnets from a class C address such as 192.168.1.0, you entail to use some of the bits from the 4th octet. As you've shown, you've broken down the 4th octet into binary 0's and 1's. If you look at row 5, you've taken 1 bit from the fourth octet.
- - - - - - - - - - - - - - - - - -> 4th octet surrounded by binary notation
5 192.168.1.128 192.168.1.10000000
- - - - - - - - - - - - - - - - - - - -> ^ one bit
This lone give you two subnets.
Subnet Mask within decimal notation
192.168.1.0 255.255.255.128
192.168.1.128 255.255.255.128
If you look at file 7, you've taken 2 bits from the fourth octet.
- - - - - - - - - - - - - - - - - - - - -> 4th octet contained by binary notation
7 192.168.1.192 192.168.1.11000000
- - - - - - - - - - - - - - - - - - - -> ^ ^ 2 bits
This solitary give you 4 subnets
Subnet Mask contained by decimal notation
192.168.1.0 255.255.255.192
192.168.1.64 255.255.255.192
192.168.1.128 255.255.255.192
192.168.1.192 255.255.255.192
Since you have need of at smallest 5 subnets, you'll necessitate to hold a different bit from the fourth octet as shown within rank 8.
- - - - - - - - - - - - - - - - - - - - -> 4th octet surrounded by binary notation
8 192.168.1.224 192.168.1.11100000
- - - - - - - - - - - - - - - - - - - -> ^^^ 3 bits
Subnet Mask in decimal notation
192.168.1.0255.255.255.224
192.168.1.32255.255.255.224
192.168.1.64255.255.255.224
192.168.1.96255.255.255.224
192.168.1.128255.255.255.224
192.168.1.160255.255.255.224
192.168.1.192255.255.255.224
192.168.1.224255.255.255.224
Since binary is a factor of two, you can single be in motion from 2 consequently 4 after 8 subnets. You can't hold merely 5.
Note: best practice is to purloin consecutive bits as shown contained by lines 1 (no bits) line 5 - 1 bit, line 7 - 2 bits, and line 8 - 3 bits and so on.
All of the subnets are valid. In the dated days you couldn't use a subnet 0. Now the Cisco IOS supports the subnet 0. Either by non-attendance or by using the intercontinental command
'IP SUBNET ZERO'
OK, so in a minute what does a subnet broadcast niggardly?
The first poster be correct within the sense that if a host (PC) sends a broadcast, it go to adjectives the devices on the subnet. As challenging a unicast where on earth one host consultation just beside one other host.
For subnetting purposes, the definition is slightly different.
Look at the 192.168.1.32 subnet
192.168.1.32 is the NETWORK address
192.168.1.33 - 62 are HOST addresses
192.168.1.63 is the BROADCAST address
You can't use the NETWORK address as a host address. It's kindly of approaching the moniker of a street. You can live on Main St, but you don't if truth be told live ON the street, you live contained by a house (host) on the street.
The HOST address are munificent of close to house numbers. Each house (host) requests a number (address). If they didn't hold numbers (addresses) how would the electric company know where on earth to dispatch your bill? Think 'unicast' single go to one host.
You can't use the BROADCAST address as a host address. The broadcast address routine adjectives the houses (hosts) on the street. Think unwanted items e-mail - it go to everyone on the street.
So, if host 192.168.1.35 have a message for adjectives the other hosts on the subnet, it wouldn't distribute out 29 messages. It would transport one message to 192.168.1.63. Since this is the BROADCAST address adjectives the hosts hear it.
I know it's a bit long winded but I hope it help.
A broadcast when it applies to network,money the meet people deliver one copy of a packet to adjectives the hosts on a lattice.When it is a subnet broadcast it method the packet is not targeted to adjectives the hosts on the net but simply to the hosts that are on a subnet. As for the first element of your quiz I really can not answer.I do not believe a subnet can appendage contained by adjectives 0's similar to the first subnet that is to say invalid.I hope a physical lattice guru help you near that quantity of your sound out.I would approaching to hear the answer myself.
You really involve to know subnetting. Here are some subnetting resources:
http://www.easysubnet.com
http://www.subnettingquestions.com/custo...