1. Network Devices

2. Network Devices

3. Media on PC
Ethernet
Modem
PC Card (WLAN)
DVB

4. Ethernet - Architecture

5. Ethernet – IEEE 802.3 10Base5 – Thick wire coaxial
10Base2 – thin wire coaxial / cheaper net
10BaseT – Twisted Pair
10BaseF – Fiber Optics
100BaseT – Fast Ethernet

6. Ethernet – 10Base5

7. Ethernet – 10Base2

8. Ethernet – 10BaseT

9. NIC Connector type Coaxial Cable Twisted Pair Cable Fiber Optics
Bayonet Nut Connector (BNC)
Twisted Pair Cable
RJ-45 (8 wire)
Fiber Optics
SMA connectors

10. Modem Allows modems of different vendors to operate together
Define How modems operate:
Modulation techniques
Data compression technique
Error detection strategy

11. Modem – Analog vs Digital
Infinite number of levels
Conform to voice pattern
Times from highest to lowest and back to the highest point in one second is the frequency
Can be transmitted over long distance
Digital
Only two levels (high and low)
Conforms to how computers operate
Cannot transmitted over long distance

12. Modem - Connection

13. Modem – Internal/External

14. PC Card – WLAN (802.11)
Bypassing last mile

15. PC Card (WLAN) - 1

16. PC Card (WLAN) - 2

17. PC Card (WLAN) – Indoor Antena

18. DVB – DVB/IP Tech
The Digital Video Broadcast over Internet Protocol (DVB/IP) system is functionally an IP-over-Ethernet simplex satellite service that incorporates frame-relay type traffic management. At its core, DVB is a modem-on-a-chip, plus an intelligent multiplexer. The antenna is typically a CATV dish, meters in diameter (for C-band), or meters (for Ku-band).

19. DVB – DVB/IP Routing

20. DVB - Adaptability

21. DVB – DVB Card

22. Media Wired Wireless Twisted Pair – UTP Coaxial Fiber Microwave
Satellite

23. Twisted Pair Two wired wrapped in a twisted fashion
Designed to reduce cross-talk due inductance
Still subject to interference from stray signal
Primarily used for local loop connections and LANs
Comparatively narrow bandwidth

24. UTP – Unshielded Twisted Pair
White/blue
Blue
Pair 2
White/Orange
Orange
Pair 3
White/Green
Green
Pair 4
White/Brown
Brown
RJ45 Connector

25. UTP – Straight Cable
Wo/O Wg/B Wb/G Wbr/Br

26. UTP – Cross Cable
Wg/G Wo/B Wb/O Wbr/Br

27. UTP - Category Category Maximum Data Rate Usual Application CAT 1
Less than 1 Mbps
Analog voice (POTS),
Integrated Services Digital Network Basic Rate Interface in ISDN
Doorbell wiring
CAT 2
4 Mbps
Mainly used in the IBM Cabling System for token ring networks
CAT 3
16 Mbps
Voice and data on 10BASE-T Ethernet
CAT 4
20 Mbps
Used in 16 Mbps Token Ring
Otherwise not used much
CAT 5
100 Mbps
100 Mbps TPDDI (100BASE-T or Fast Ethernet)
1000 Mbps (4 pair)
155 Mbps ATM
Gigabit Ethernet
CAT 5E
CAT 6
MHz
Super-fast Broadband Applications.

28. Coaxial Center lead conducts the signal
Protected by insulation and braded wire
Used mostly for television and connections to antenna
Larger Bandwidth but large in size

29. Fiber Optical Signal transmitted by photos rather than electrons
Dramatically higher bandwidth
Used mostly for backbone communication connections, very high speed LANs and fast network connections

30. Microwave – Antenna (1)
Omni
2.4GHz 8dBi

31. Microwave – Antenna (2)
Sectoral
14dBi 180deg

32. Microwave – Antenna (3)
Sectoral
17dBi 90deg

33. Microwave – Antenna (4)
Direct (Grid)
2.4 GHz 24dB

34. Microwave – Power AMP

35. Satellite - Broadband

36. Media Comparison

37. Multiplexer
HUB
Switch
Bridge
Router

38. Hub versus Switch
Hub provide connection to all ports (i.e. in one port and out all other ports).
Passive hub – no signal regeneration
Active hub – provide signal regeneration
Switch direct the message from appropriate port (directs a message from the input port to the desired output port).
More expensive but better bandwidth utilization

39. Hub versus Switch

40. LAN Hub device

41. Hub

42. LAN Switch device

43. Switch

44. Bridge – Access Point (WLAN)

45. Router Connecting different segment
Have different interfaces (Ethernet, WAN-Serial, Fiber, etc)
Table Routing

46. Router