Appeal No. 2006-1084
Reexamination Control No. 90/006,334
1 6. There are protocols for network communications, usually in the
2 form of a layered set. (‘786 Patent, col. 7, lines 30-31.)
3 7. The International Standards Organization (ISO) has developed
4 a model communication protocol referred to as the ISO 7-layer model.
5 Figure 4 of the ‘786 Patent illustrates the seven layers of the ISO model.
6 (‘786 Patent, col. 7, lines 31-38.)
7 8. In the ISO, each layer represents a particular function. (‘786
8 Patent, col. 7, lines 34-35.)
9 9. The lower-most layer of the ISO, Layer 1, is the hardware
10 network connection, such as a physical wire. (‘786 Patent, col. 7, lines 39-
11 41.)
12 10. ISO Layer 2, Data Link Layer 52, is responsible for providing
13 reliable transmissions of data and it may be a network interface card that
14 links a computer to the network. (‘786 Patent, col. 7, lines 41-44.)
15 11. ISO Layer 3, the Network Layer 54, is the network software for
16 routing packets throughout the network. (‘786 Patent, col. 7, lines 45-46.)
17 12. ISO Layer 4, the Transport Layer 56, transports data from the
18 network to the upper levels of the ISO model. (‘786 Patent, col. 7, lines 46-
19 48.)
20 13. ISO Layer 5, the Session Layer 58, deals with establishing
21 network sessions whereby logical connections are established based on a
22 user request. (‘786 Patent, col. 7, lines 49-51.)
5
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