1. Computer Networking System

2. ก

3. Local area network ( LAN )
metropolitan area network ( MAN )
wide area network ( WAN )

4. L OCAL AREA NETWORK
( LAN )
LAN (Local Area Network)
30 ก ก
Twisted-pair ! ก" # ก
$ % & ! 'ก !
"ก "ก !ก( ก LAN )* +
# Intranet ( Internet

5. ( ก ก ) ก )" ')
!ก / (Client/Server)
(Server) ,- )" ' ก ! " . ก # !
/0! ก ก )" '(0ก (Client)
! (
" #! " (Peer-to-Peer) )" ' (
! ก )" ' (
/0! ก ( /0 ก ! ! -

6. LAN
Sharing of peripheral devices : ก !
. ก ' 1 ) )' , $ '% )" '
2& ) 0 -Sharing of programs and data
: ก ! 3 ก ( 0(
Better communication : ก ก"
Access to database : -+ 0($
"ก

7. L OCAL AREA NETWORK
( LAN )

8. METROPOLITAN AREA
NETWORK ( MAN )
MAN (Metropolitan Area Network)
50 ก . ก
กก 3 LAN ! " "ก "ก
ก )" ' " # ก ! ก
0( ! ,((0( '3% ,- .ก '! ก
3 4) ' ! 5 .

9. WIDE AREA NETWORK
( WAN )
ก " LAN * 2 "
-* $ ก ! $ก( ก "
" 43 ก (" WAN
ก " 2 3 4) '
$ 3 "% "

10. $ (bus topology)
(mesh topology)
% (ring topology)
(star topology)
&' (hybrid topology)
& (Wireless Network)

11. &
(W IRELESS N ETWORK )

12. ก
LAN Card % NIC % Network Adaptor
modem
Repeater
Hub
Switches/Bridge
Router
Gateway

13. ก # $((
(R EPEATER )
. ก ' " 66 # ! Layer 1 OSI Model
. ก ' # 66 ( (" !
(Regenerate) ! 66 0( ก
ก * ก$ . ก ' " #!
66 $ $ $ก( -* 3 66 $ 06

14. '$ (H UB )
ก ก “
(Port)” Hub ก
ก ! Hub " #$$ %& # '&
( ก) " "ก " 'ก Hub

15. )/
*
(B RIDGE /S WITCHES )
S
* "+ Layer " 2 OSI Mode
Segment 2 Segment กก * ก
-* . " Data Link Protocol * ก
%& Network Protocol * ก Ethernet
LAN ( Topology % # %& - - & Ethernet)
2 Segment * ก
Bridge # /ก '&" # )* -* # '&"
# ( & " '" * "+ # / *ก ก %
'&)* #"01 ก 2(

16. G ATEWAY
. ก '7 ' " ' & "ก
ก ! ก " '! ก )" ' &
), (PC) ก )" ' & (MAC)

17. ก
Wan " $ก+ &
Ring Star ก$ &
Wireless Network " $ก+ &
) ก $ ก 3 , ก