3. O

5. WAN
LAN

7. .1
.2
.3
STC Mobile Go .1
Server
.2
Mail
.3
Server

8. Server
Client

9. O
]
[
O

12. O
.1
.2
.3

13. O
O
O
O
O
O
O

14. O
.1
.2
.3
.4

15. O
.1
.2

16. –
–

17. O
MAC
Address

18. O
–
–
O
O