394     5        

.  IP      DNS,   
       IP--
.          
          
  IP-.   Unix      hosts  -
   /etc.

2.  ,   cit.dol.ru   hosts,     
142.06.13.14 sl.msk.su

 ,    ,   IP -
   IP-    142.06.13.14  -
   sl.msk.su.

3.  IP  cit.dol.ru ,    -
   142.06.13.14.      (142.06.0.0) 
   (194.87.23.0) ,   --
,   .

4.  cit.dol.ru    Ethernet   IP-
   , IP-    194.87.23.1,
  -,      
.   -   IP 
  ARP,   ARP-.    
 cit.dol.ru  -  ,   
 ,    IP-  - -
      -  ARP. 
         -:

194.87.23.1   008048760

  - 008048760    
     MAC .

5.    cit.dol.ru     , -
   Ethernet,   :

\______,_________________________..___________;

"VVV
  Ethernet     IP                IP

6.    1  1    
Ethernet,   -      . -
 Ethernet     IP-    
 ,   IP.  IP -
     142.06.13.14    
 .   1     -
 

142.06.0.0    135.12.0.11 2,

   ,     142.06. 0.0   -
 135.12.0.11,   ,    2 -
 1.