Andy's Technotes Home |
Tip Jar |
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7 - Application |
Your Message: Dear Mom |
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6 - Presentation |
Spelling, Punctuation, Grammar |
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5 - Session |
Name, Date, Stamp |
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4 - Transport |
Envelope |
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3 - Network |
Postal/Zip Code |
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2 - Data Link |
Street Address |
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1 - Physical |
Mailman,Trucks, Airplanes, Leather Bag |
(C) this is from a 1991 Novell training manual
Common unofficial extensions are for layers 8, 9, 10 and possibly higher that are best described as Religion/Faith, Politics, and Price. Unfortunately these extensions are not the clearest to deal with, but understanding that they are usually present in some form can help reduce the chance that they blind side you.