Internet Protocall Address 1--192.168.32.1/16.
Internet Protocall Address 2--192.168.32.1/24.
Are these Internet Protocall addresses are same or different?
Both are same. Only Subnet mask is different. So IP Address1 is in bigger subnet then IP address2. Both of them cant co-exist in same subnet, since it will lead to a conflict.
Related
When I hear/read about internet address, it is always IPv4 address or its successor IPv6 address? But as far as I know, these are not built into the internet itself. Instead, these addresses are defined and used by the IP protocol. In that case, why isn't there an alternative protocol?
If it is there, does that use a different internet address? I never heard any addresses like this!! My device's IP address is decided by my ISP. Instead if I'm using some other protocol, address for that also will be provided by my ISP?
Also, does MAC address have alternatives? For this, I think the answer is 'no'. Because, MAC address is built into the device while manufacturing. So, I want to use a different protocol, which uses a different kind of address, then entire device has to be changed! Is this correct? If not, what are the other hardware addresses like MAC?
Is it possible to have a communication network without IP? Sure.
But the internet, by definition, is a network of networks that use TCP/IP to communicate. IP is the gule that makes it possible to the point that you could argue that the IPv4 internet is a separate network than the IPv6 one.
In a global internet, for two machines on the same subnet to communicate, they need to know each other's physical address. So, the source machine has to map the internet address of the destination into a physical address. Why is this address mapping important? Couldn't the two machines just communicate using their internet addresses?
Because the goal of the Internet is to connect different types of subnets together. It is local decision of each subnet how to organize addressing on this subnet and how to deliver packets on it. Thus layer 3 (that uses IP addresses) delivers packets up to the subnet, and then the subnet (layer 2) decides how to deliver packets within itself.
Mapping, that you are describing is done for Ethernet-type subnets. One can potentially have different types of subnet protocols which do addresses differently. Although, now, almost everyting falls under Ethernet-family.
When I type ipconfig in my windows pc I am able to see my Ethernet adapters local area connection IP address for eg : 193.168.1.13 . Now my problem is when I browse the internet I see that My ISP provides different IP addresses for different sessions when I check for my IP. I am not happy with some ip addresses which my ISP provides to me . Is there a way to block my ISP from assigning those IP addresses . Can I write such a rule in firewall so that I can block that range of ip addresses ?
If possible then please tell me how to do that ?
Thanks in advance .
I had connect my laptop and phone under a same router/modem.
But the IP addresses that shown on my laptop and phone are different, why???
I'm quite newbie for it, please help me
IP addresses are different inside your network. When you send data outside the network your router uses NAT (Network Address Translation) to assign your Internal(LAN) address your External(WAN) address for the duration of that communication. If they had the same Internal IP address then you would have an error like this http://compnetworking.about.com/od/workingwithipaddresses/f/ip_conflict.htm
I have 2 machine. One's IP is 169.254.41.172 and the other is 169.254.72.175. They are both connected to the same router. Why is the 'subnet?' different? I'm referring to the 3rd number between 41 and 72.
These are linklocal addresses, they use 255.255.0.0 as subnet mask, so both addresses are in the same subnet.
These addresses are generated automatically, if you want more control over them you will either need a DHCP server, or configure static IP addresses.
Your router is not acting as a DHCP server it seems.
169.254 is a special range usually for Windows machines when they can't obtain an IP address automatically.
From: http://packetlife.net/blog/2008/sep/24/169-254-0-0-addresses-explained/
Occasionally you may encounter a host which has somehow assigned
itself an IP address in the 169.254.0.0/16 range. This is a
particularly common symptom of Windows machines which have been
configured for DHCP but for whatever reason are unable to contact a
DHCP server. When a host fails to dynamically acquire an address, it
can optionally assign itself a link-local IPv4 address in accordance
with RFC 3927. Microsoft's term for this is Automatic Private Internet
Protocol Addressing (APIPA).
These machines are not getting an IP address. The beginning octets of "169.254" identify these addresses as "link-local".
http://en.wikipedia.org/wiki/Link-local_address
For what it's worth, the addresses are not on different subnets as the full link-local definition is 169.254.0.0/16, or a "Class B" subnet. That being said though, there's no way you'll be getting these computers to communicate any time soon. Is the router powered on, are the cables connected and are there uplink lights on the actual RJ45 jacks on both the router and computers? Is DHCP enabled on the router?