-- card: 102105 from stack: in
-- bmap block id: 102330
-- flags: 0000
-- background id: 96550
-- name: definition13


-- part 1 (field)
-- low flags: 01
-- high flags: 0000
-- rect: left=128 top=70 right=89 bottom=509
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 158
-- text size: 14
-- style flags: 0
-- line height: 16
-- part name: subHeader


-- part contents for background part 4
----- text -----
Terms and Concepts


-- part contents for background part 9
----- text -----
Apple Macintosh SE/30

-- part contents for background part 5
----- text -----


Network software ensures that information passed through the cabling is both complete and correctly interpreted by the receiving computers. In order to accomplish this, the software is organized into functional layers, called protocols. Transactions between layers are minimal so that data transfer occurs efficiently. 

Because each layer is defined by function, rather than structure, any layer may be altered without affecting other layers. For example, a network connected by copper cable could switch to satellite communication with no noticeable difference, (except decreased cost and increased reliability). 

-- part contents for card part 1
----- text -----
What are network protocols?