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Crazy man
11-29-2011, 01:01 PM
Ok, so here's the deal, layer 3 is the Network layer of the OSI model. Essentially they deal with incomming packets. Now, DHCP is seen as an application layer protocol (layer 7 of the model) and also DNS. Now both of them work with IP addressing and without IP addresses and DNS, the transfer of data would be non-existent. They DO fall under 'application' but can you also make a case for them being a layer 3 protocol too?

ollinger
11-29-2011, 01:20 PM
ummm.....no.

sureshs
11-29-2011, 01:20 PM
Layer 3 just routes packets across networks. DHCP and DNS are implemented by servers to dole out IP addresses or translate name to address.

Also, everyone uses the TCP/UDP over IP stack. OSI model is sort of academic interest only.

sureshs
11-29-2011, 01:21 PM
ummm.....no.

Is that the answer to the post or to the thread title?

r2473
11-29-2011, 01:25 PM
am I being an idiot?

http://www.demotivationalposters.org/image/demotivational-poster/0901/if-you-have-to-ask-demotivational-poster-1233449411.jpg

ollinger
11-29-2011, 01:34 PM
(answer to thread title)

ImAGrinch
11-29-2011, 01:42 PM
The network layer is required for any of the higher levels to function. You can't send packets if you don't have a way to route them through the network.

You could eliminate DHCP and DNS and still route packets through the network.

ChipNCharge
11-29-2011, 02:01 PM
Ok, so here's the deal, layer 3 is the Network layer of the OSI model. Essentially they deal with incomming packets. Now, DHCP is seen as an application layer protocol (layer 7 of the model) and also DNS. Now both of them work with IP addressing and without IP addresses and DNS, the transfer of data would be non-existent. They DO fall under 'application' but can you also make a case for them being a layer 3 protocol too?

I understood about three words in your post.

Fearsome Forehand
11-29-2011, 02:08 PM
E=MC^2

Solve for x and reboot. :)

Crazy man
11-29-2011, 03:27 PM
Layer 3 just routes packets across networks. DHCP and DNS are implemented by servers to dole out IP addresses or translate name to address.

Also, everyone uses the TCP/UDP over IP stack. OSI model is sort of academic interest only.

I understand what the OSI model does. By the way the differences between the Internet Model and OSI is that 7,6,5 are scaled into the Application layer of the Internet model and has no Physical layer like OSI. That's why I mentioned OSI as it's expanded.

Crazy man
11-29-2011, 03:33 PM
You could eliminate DHCP and DNS and still route packets through the network.

Not true, if one host wanted to send a message to another host on a different computer system over a network you would need a Fully Qualified Domain Name. Reverse lookup zones are used to translate an IP address into a FQDN.

ImAGrinch
11-29-2011, 07:58 PM
Not true, if one host wanted to send a message to another host on a different computer system over a network you would need a Fully Qualified Domain Name. Reverse lookup zones are used to translate an IP address into a FQDN.

You can send messages directly to a remote IP ithout specifying a FQDN.

ImAGrinch
11-29-2011, 08:04 PM
Sorry can't edit as a new user I presume, but DNS is not necessary for TCP/IP to work. But it is necessary for the internet to remain easy to use. Otherwise people would have to memorize IP addresses when getting on websites.

Sentinel
11-29-2011, 08:18 PM
OP,
You should join forums such as stackoverflow.com and its sisters superuser.com .

Crazy man
11-30-2011, 01:36 AM
Sorry can't edit as a new user I presume, but DNS is not necessary for TCP/IP to work. But it is necessary for the internet to remain easy to use. Otherwise people would have to memorize IP addresses when getting on websites.

Yeah I get it, I thought I uncovered a slight flaw in the model, that's all. Before DNS they used HOSTs file, which was ridiculous.

thug the bunny
11-30-2011, 08:00 AM
What is the best detection method for UHPLC of organic species at the ppb level that don't contain pi electrons and thus do not show a usable UV-VIS specrum?

Wait...why am I posting this in a tennis forum??

sureshs
11-30-2011, 08:02 AM
What is the best detection method for UHPLC of organic species at the ppb level that don't contain pi electrons and thus do not show a usable UV-VIS specrum?

Wait...why am I posting this in a tennis forum??

It is all about sigma and pi bonds

r2473
11-30-2011, 10:24 AM
It is all about sigma and pi bonds

The bonds can last a lifetime (especially if you knock up a tri-delt):

http://sigmapioregon.com/uploads/images/0000/9307/n11518735_35260379_3894.jpg

Polaris
11-30-2011, 07:19 PM
Also, everyone uses the TCP/UDP over IP stack. OSI model is sort of academic interest only.

This.

10routers.