2. Computer Network)

3. LAN (Local Area Network)
MAN (Metropolitan Area Network)
WAN(Wide Area Network)
LAN (Local Area Network)
MAN (Metropolitan Area Network)
WAN (Wide Area Network)
World wide
dial up/
Leased Line/ ISDN)

5. •
•
•
•
•
•

6. Peer to Peer
Client Server• Peer to Peer Network
Peer)
Client Server
Peer to Peer
Workgroup) Windows 98/Me XP
• Client-Server
-
peer to peer client-server
server

7. 1. Ethernet/ Fast Ethernet/ Gigabit Ethernet
2. Wireless LAN
Ethernet / Fast Ethernet / Gigabit Ethernet LAN
LAN
Gbps
UTP Fiber optic
Wireless LAN

8. Wireless
• IEEE 802.11 GHz
Mbps
• IEEE 802.11b GHz
Mbps / 22Mbps
• IEEE 802.11a GHz, 5.47～
5.725GHz Mbps
• IEEE 802.11g GHz
Mbps
• IEEE 802.11n GHz / 5GHz
Mbps

9. • Ad-Hoc)
Access Point

10. •
Access Point)
Access Point

11. Protocol)

12. • Syntax Format) Structure)
address)
syntax
• Semantics
syntax
• Timing
Mbps
Mbps

13. Standard)
International Organization for Standardization (ISO)

14. • physical layer)
• data link layer)
node) 2
• network layer)
• transport layer)
• session layer)
-
-
module)
• presentation layer)

15. •
TCP/IP, FTP, HTTP HTTPs

16. TCP/IP (Transmission Control
Protocol/Internet Protocol)
ARPANET
TCP/IP
•
•
-

17. TCP/IP
Header Header
Encapsulate
Header
Demultiplexing

18. Encapsulation/Demultiplexing
TCP/IP

19. - Host-to-network)
IP
The
Internet Layer)
packet-switching network)
Connectionless)
Packet)

20. Protocol (TCP)
connection-oriented) Byte stream
message
message TCP
UDP (User
Datagram Protocol) connectionless)
client/server
system) request/reply)
voice)
Application Layer)
TELNET
FTP
SMTP

21. FTP (File Transfer Protocal)
FTP
• FTP
USER) User Interface
FTP FTP
PI (Protocol Interpreter module)
DT (Data Transfer

22. HTTP(Hyper Text
Transport Protocol)
•
HTTP
end-user)

23. HTTPs(Hypertext Transfer
Protocol Security )
• HTTP protocol
server client
Netscape
- -

24. Network Topology)

25. Network Topology)

26. point-to-pointConnection)
multipoint Connection)
point-to-point)
multipoint)

27. Bus Topology
backbone coaxial
terminator
-

28. Bus
•
–
– Star
–
•
–
– Terminator
–

29. Ring-Topology
•

30. Star-Topology
HUB)
• Star
•
•
Bus
hub switch

31. •
• Transmission Media)
• Hardware)
•
Software)

33. Router)
•
LAN
WAN

34. Switch
•
• Bandwidth 10/100/1000 Mbps
•

35. Hub
•
• Bandwidth 10/100/1000 Mbps
•

36. Hub
Switch
• Hub Hub
Hub Switch
Switch
Hub
– Hub Repeater)
Switch

37. Ethernet Card
•
Switch Hub
• Bandwidth 10/100/1000 Mbps

38. Ethernet Card
• LNK LINK
• MB/s
MB/s
• ACT (Activity) -

39. Modem
•
• Bandwidth 56 Kbp

40. Access Point
•
wireless)
• Bandwidth 11/54 Mbps

41. Wireless Card
•
• Bandwidth 11/54 Mbps

42. UTP (Unshielded Twist Pair)
•
Ethernet Switch Hub
• Bandwidth 10/100/1000 Mbps
•

43. UTP RJ-45
• UTP Ethernet Lan
RJ-45
• UTP

44. RJ-45
• A (Standard 568A)
•
•
•
•
•
•
•

45. • B (Standard 568B)
•
•
•
•
•
•
•

46. UTP RJ-
45
• UTP Straight Cable)
Hub Switch
A B
• UTP Cross-over Cable)
Hub Switch
Router (

47. UTP Straight Cable)

48. UTP Cross-over Cable

49. STP (Shielded Twisted Pair)
• UTP
UTP
• UTP

50. Fiber Optic
•
• Bandwidth 10/100/1000 Mbps
• m – 2Km

51. Duplex
• Half Duplex
Ethernet BaseT (10Mbps)
• Full Duplex
Fast Ethernet
(100Mbps) Gigabit Ethernet (1000Mbps)

54. •
•
digital
•
•
•

55. •
•
•

56. WIRELESS LAN)
•
• Wireless LAN WLAN)

57. •
• Mobility)
•
•
•

58. • PC
Notebook Pocket PC
PCMCIA
•
Cisco, Orinoco, Toshiba, 3Com, Linksys
• Access Point) :
LAN

59. • Ad-Hoc)
Access point)
• Infrastructure)
Access
point)

60. • WPAN (Wireless Personal Area Network)
IR (Infra-Red) Bluetooth
• WLAN (Wireless Local Area Network)

61. • FireWall)
•
• User
Name and Password)

63. • ipconfig ->
• Ping ->
• Nslookup ->
• Traceroute ->

64. .6/1