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IP adresses


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#1
BeanLovesCrackers

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Which one of these isn't a real IP?
192.168.0.3(this looks real)
230.168.0.3
255.255.255.255(so does this..)
2001::1(and this..)
10.40.20.0
4354962241
::1
0xca86ad3(this one looks "hashed")
2354962241
021743504753
I would find out myself but since my english isn't well, i have to ask someone.
Thanks
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#2
dsenette

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uh...what are you trying to find out? and why? what exactly do you mean by "real ip"
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#3
BeanLovesCrackers

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by real ip, i mean that actually can excist..
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#4
dsenette

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192.168.0.3
230.168.0.3
10.40.20.0

are the only true ip addresses in your list

255.255.255.255 is in a dotted quad format...but this cannot be used as an ip address...this is subnet mask (generally)...if your ip were 255.255.255.255 then that would be in full broadcast mode...you can't use this on any machine as it's ip address

technically you can represent IP's in hex or binary...but this is only usefull in certain applicatioins....such as website addressing...you could punch the ip address of your website into the browser and you'd get to it...or you could put the hex version of the ip and still get there...but...as far as actuall machine addresssing...you can't do this


why are you asking?
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#5
BeanLovesCrackers

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I'm taking some kind of a test. All these IPs could actually work, there's one wrong option, i wannt to find that out.
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#6
dsenette

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well...we can't help you with homework...so...

the "realness" of an ip revolves around the application it's being used in etc..
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#7
BeanLovesCrackers

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it's not a homework
tommorow i'll let you know the right answer. i chose first one
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#8
Doomed_to_a_pathetic_computer

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Well, the 255.255.255.255 is a poorly made subnet mask. 192.168.0.3 is a class C, which means that the subnet mask should be 255.255.255.0. 230.168.0.3 is a valid IP address, but it's a class D, which means you shouldn't be able to use it. 10.40.20.0 is a network address, which means it can't be given to a host or any device. The first one is the only valid IP address.

192.168.0.3 [Valid IP]
230.168.0.3 [Invalid IP]
255.255.255.255 [Invalid subnet mask]
2001::1 [Invalid IP]
10.40.20.0 [Invalid IP]
4354962241 [Invalid IP]
::1 [Invalid IP]
0xca86ad3 [Invalid IP]
2354962241 [Invalid IP]
021743504753 [Invalid IP]
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