18.   
18.1        
18.2     
18.3      
18.4          
18.5     " "
18.6     
18.7  
18.8      
18.9       
18.10     


18.   

                     :

18.1        

1.            .
2.           ͡         .       .
3.        .        ""     .

18.2     

1.      .  " -F4"  .
2.      .  " -F2"   /  .

18.3      

1.  "-F1"    .

18.4          

1.  "-F1"      "-F4"   .

18.5     " "

1.                "F1"    ""   "F2-F3"    .      ϡ    -1-5-6"     .


18.6     

1.     ɡ              " ".
2.             .
3.     DSL              " ".
4.    Wi-Fi    .  " --1-4-5-6"      .

18.7  

1.                         3 (POP3)     (SMTP)  .
2.               .

18.8      

1.           .  "  F3"    /   .

18.9       

1.          ѡ      .               "1-2-3-4-5-6-F2-F3"          5 .
2.      " "                .    " "    . (               .)     " "       " ".     "      (     30 - 45 ).

18.10     

    ѡ     ǡ  "-o ( 1-3-5)"  " "    "F3-F4"   ""   ɡ    ""    .

