 2.   TCP/IP 103

. Backbone        -
,     -  ,  
   .    -
    OSPF,      
        
 ,     . -
         -
,        .

 . 2.30  4, 5, , 10, 11  12  .   HI
 3     2  2,   -
   13,      12,    -
     11.  11     
 10  ,      -
    ( 9  7)   ,     -
   2.

. 2.30.     OSPF