What Is The Difference Between My Ip Host-ip Number And My Net-ip Number And How Do I Calculate

To Calculate a subnet mask using the number of hosts here is what you need to do:let’s take 500 hosts for example.first thing you need to do is figure out the power of 2 that’s bigger than 502 (500+ Network and broadcast addresses) but is still close.for our case it’s 512. you can get it through 2^9so we need 9 bits To make up 512 which means 9 bits of the ip address are gonna be left for the host part (or as Cisco People love to call it the Host-ID)the IP address is 32 bits in total.if you subtract 9 out of 32 you are left with : 23 (these are the bits left for Network-ID + Subnet-ID)your answer is: /23 if you want the dotted decimal version :11111111.11111111.11111110.00000000 (23 of 1 and the rest is 0)convert each 8 bits into decimal:your Answer: 255.255.254.0Now practice what you have learned so far. I recommend using this app if you have an android phone : Subnetting Guru

In classful addressing,an IP address of class A,B and C is divided into two parts : netid andhostid.The netid and hostid areof varying lengths, depending on the class of the address.Netid: The part of an IPaddress that identifies the network.Hostid: The part of an IPaddress that identifies a host in a network.Class A: One byte netid three bytes host idClass B: Two bytes netid Two bytes host idClass C: Three bytes netid One byte host id***EXAMPLE**** : IP address: 84.42.58.11Binary Notation: 01010100 00101010 0011101000001011It is a class A IP address.The network address /netid is 84.0.0.0The host addresses /hostid is 0.42.58.11.For more details watch Ravindra Babu lectures on youtube

Originally, phone numbers were exactly the same as an IP address.The original purpose of a phone number was to create a numeric reference to a specific pair of wires into your house.For example, I grew up in the mission district of San Francisco. All phone numbers in the Mission started with “Mission.” So, your number was “Mission 123456” or whatever. When automated switching systems were introduced, the “Mission” part was replaced with a replacement number. In this case, “MI” translated to 64. Then my mom’s phone number changed to 641–3456. This continued for many years. Until the cell phone.Today, your prefix and even to some extent your area code are pretty much irrelevant. I can be anywhere on earth (almost) and you can call my “California” number and it will ring through.An IP address is similarly a network routing architecture. IP (version 4) addresses are arrainged into four groups of eight bytes each. Usually this is written in decimal format like this 1.2.3.4. However, this is simply representing four groups of eight bytes which is why each number can go from 0 to 255.An IP address is then broken up into two parts, the subnet IP and the host IP. The number of bits that compose each part are variable. There is something called a “subnet mask” that helps the computer determine which part of that number represents the subnet and which represents the host. For example, I might have an “eight bit” mask like this: 255.255.255.0. This is a common subnet mask ask it allows for 254 hosts on a single network (host 0 and host 255 are normally not allowed, hence 254 possibilities).Thus, a phone number originally had a “subnet” number which is the prefix and a “host number” which is the following numbers. This is pretty similar to the way IPv4 works. Or rather, the way IPv4 used to work. Now we have things called NAT and VPN which can hide, mask or change your IP address to allow you to pretend to be in the UK when you are actually in the USA and vice versa. So, like phones your actual IP subnet number is no longer very indicative of your actual physical location.

Subnetmask is used to identify the network of the IP address.Subnetmask needs to be calculated in binary format and apply in decimal format.IPV4 address contains 8 bits in each octet.Totally 4 octets. So 32 bits.If all 8 bits are ‘0’ decimal equivalent is 0. if all 8 bits are ‘1’ decimal equivalent is 255 (Here ‘0’ & ‘1’ represented in binary)In every IP address it contains Net bits and Host bitsTo calculate subnetmaskChange all the net bits to ‘1′Change all the host bits to ‘0’Example: If we take class A IP address First Octet contains Net bits and other three octets for Host bitsSo subnetmask for Class A address will be 255.0.0.0Class B - 2 Net octet and 2 Host octet 255.255.0.0

The source and destination IPs are roughly analogous to the caller and called numbers in a telephone conversation. You must have a phone number on a telphone system in order to make a call, and this is analogous to the source IP. The callee has the number that you call; the destination IP. The analogy is a bit weak in the sense that in TCP/IP communications, the communication is composed of many discrete messages that travel in both directions. Each individual message contains both the source and destination IP addresses of the two peers (TCP). In UDP messages, the destination can be many peers and we call this multicasting or broadcasting. It is useful for the message to contain the sender’s IP, because it allows the recipient of a message to know the address for a reply. In that sense, it is somewhat like using the return address that is normally written of a postal mail item.