Subject: RE: threats ID

From: "Ayyasamy, Senthilkumar \(UMKC-Student\)" <[email-masked]>
Date: Sun, 25 Jan 2004 05:26:32 -0600

>> Can you provide a citation (RFC) which illustrates your
>> statement:
>> 
>>    > There is no such thing as layer 3.5.
>>    > Network layer solutions are at layer 3,
>>    > transport layer solutions are at layer 4.
>>    > PERIOD  
>
>You should ask it Brian, because he said 3.5 first.
 
OTOH, you stated explicitly that "Network layer 
solutions are at layer 3. transport layer solutions 
are at layer 4." Please provide a citation for this 
one...
  
>> As another example, transport advertises that it is ECN enabled
>> but congestion notification is given by the routers at network
>> level.
>
>That's perfectly fine layering.
 
But, it also points out that ECN and IPsec negates your 
sweeping statement "Network layer solutions are at layer 3. 
transport layer solutions are at layer 4."  
 
>> So, you are wrong, completely.
 
so, I am correct.
 
I suggest you read:
 
  D. Clark and D. Tennenhouse. 
  Architectural Considerations for a New Generation of protocols
  ACM SIGCOMM 1990.