386     5             ___

  ,    MF (More Fragments) -
  ,      ( ) -
.   .

   (Fragment Offset)  13    
            -
,  .   / 
         MTU. -
    8 .

   (Time to Live)      
,        .   
       .  -
            
  ;      ,   -
  .     -
  ,    ,      
  ,       ,
    .      
 ,    ,    .  
     .   
    IP-.

    (Protocol)     -
,      , -
     (,      TCP,
 UDP,  ICMP  OSPF).    -
     RFC Assigned Numbers.

  (Header Checksum)  2    -
  .        
     (,  ),  
       IP-. -
   16         16--
  .       
    .    ,
   ,     .

 IP-  (Source IP Address)  IP-  (Destination
IP Address)     32     .

  (IP Options)      
  .     , 
      ,    -
   .      , -
         .  
      , -
   ,   
,    .      
,           
    32- .

  (Padding)   ,    ,
 IP-   32- .  -
 .