index_SYMBOL

[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Z]

! (exclamation point)  
# (hash mark)
       enable mode  
. (period)  
? (question mark)
       accessing IOS help system   2nd   3rd  
       IOS help system   2nd  
2-layer hierarchy
       2-layer hierarchy  
20-bit prefixes (MAC addresses)  
2B+D