Chapter  3 Objectives  Upon completion you will be able to: Underlying Technology <ul><li>Understand the different version...
Figure 3.1   Internet model
3.1  Local Area Networks A  local area network (LAN)  is a data communication system that allows a number of independent d...
Figure 3.2   CSMA/CD
Figure 3.3   Ethernet layers
Figure 3.4   Ethernet frame
Figure 3.5   Ethernet implementations
Figure 3.6   Fast Ethernet implementations
Figure 3.7   Gigabit Ethernet implementations
Figure 3.8   BSSs
Figure 3.9   ESS
Figure 3.10   Physical layer
Figure 3.11   FHSS
Figure 3.12   DSSS
Figure 3.13   MAC layers in IEEE 802.11 standard
Figure 3.14   CSMA/CA
Figure 3.15   Frame
Table 3.1  Addresses in IEEE 802.11
3.2  Point-to-Point WANs A second type of network we encounter in the Internet is the point-to-point wide area network. A ...
Figure 3.16   56K modem
ADSL is an asymmetric communication technology designed for residential users; it is not suitable for businesses. Note:
Figure 3.17   Bandwidth division
Figure 3.18   ADSL and DSLAM
Figure 3.19   Cable bandwidth
Figure 3.20   Cable modem configurations
Table 3.2  T line rates
Table 3.3  SONET rates
Figure 3.21   PPP frame
3.3  Switched WANs The backbone networks in the Internet are usually switched WANs. A  switched WAN  is a wide area networ...
Figure 3.22   Frame Relay network
A cell network uses the cell as the basic unit of data exchange. A cell is defined as a small, fixed-size block of informa...
Figure 3.23   ATM multiplexing
Figure 3.24   Architecture of an ATM network
Figure 3.25   Virtual circuits
Note that a virtual connection is defined by a pair of numbers:  the  VPI  and the  VCI . Note:
Figure 3.26   An ATM cell
Figure 3.27   ATM layers
The IP protocol uses the  AAL5  sublayer. Note:
We will discuss IP over ATM in Chapter 23. Note:
3.4  Connecting Devices LANs or WANs do not normally operate in isolation. They are connected to one another or to the Int...
Figure 3.28   Connecting devices
Figure 3.29   Repeater
A repeater connects segments of a LAN. Note:
A repeater forwards every bit;  it has no filtering capability. Note:
A repeater is a regenerator, not an amplifier. Note:
Figure 3.30   Function of a repeater
A bridge has a table used in filtering decisions. Note:
Figure 3.31   Bridge
A bridge does not change the physical (MAC) addresses in a frame. Note:
Figure 3.32   Learning bridge
A router is a three-layer  (physical, data link, and network)  device . Note:
A repeater or a bridge connects segments of a LAN. A router connects independent LANs or WANs to create an internetwork (i...
Figure 3.33   Routing example
A router changes the physical addresses in a packet. Note:
Upcoming SlideShare
Loading in …5
×

Chap 03

565 views

Published on

All the Details About TCP IP

Published in: Technology, Business
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
565
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
16
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Chap 03

  1. 1. Chapter 3 Objectives Upon completion you will be able to: Underlying Technology <ul><li>Understand the different versions of wired Ethernet </li></ul><ul><li>Understand wireless Ethernet </li></ul><ul><li>Understand the types of point-to-point WANs </li></ul><ul><li>Understand the types of switched WANs, especially ATM </li></ul><ul><li>Differentiate between repeaters, bridges, routers, and hubs </li></ul>
  2. 2. Figure 3.1 Internet model
  3. 3. 3.1 Local Area Networks A local area network (LAN) is a data communication system that allows a number of independent devices to communicate directly with each other in a limited geographic area such as a single department, a single building, or a campus. A large organization may need several connected LANs.The most popular LANs are Ethernet and wireless LANs. We briefly review these technologies in this section. The topics discussed in this section include: Wired LANs: Ethernet Wireless LANs: IEEE 802.11
  4. 4. Figure 3.2 CSMA/CD
  5. 5. Figure 3.3 Ethernet layers
  6. 6. Figure 3.4 Ethernet frame
  7. 7. Figure 3.5 Ethernet implementations
  8. 8. Figure 3.6 Fast Ethernet implementations
  9. 9. Figure 3.7 Gigabit Ethernet implementations
  10. 10. Figure 3.8 BSSs
  11. 11. Figure 3.9 ESS
  12. 12. Figure 3.10 Physical layer
  13. 13. Figure 3.11 FHSS
  14. 14. Figure 3.12 DSSS
  15. 15. Figure 3.13 MAC layers in IEEE 802.11 standard
  16. 16. Figure 3.14 CSMA/CA
  17. 17. Figure 3.15 Frame
  18. 18. Table 3.1 Addresses in IEEE 802.11
  19. 19. 3.2 Point-to-Point WANs A second type of network we encounter in the Internet is the point-to-point wide area network. A point-to-point WAN connects two remote devices using a line available from a public network such as a telephone network. We discuss the physical and data link layers of these technologies here.. The topics discussed in this section include: Physical Layer Data Link Layer
  20. 20. Figure 3.16 56K modem
  21. 21. ADSL is an asymmetric communication technology designed for residential users; it is not suitable for businesses. Note:
  22. 22. Figure 3.17 Bandwidth division
  23. 23. Figure 3.18 ADSL and DSLAM
  24. 24. Figure 3.19 Cable bandwidth
  25. 25. Figure 3.20 Cable modem configurations
  26. 26. Table 3.2 T line rates
  27. 27. Table 3.3 SONET rates
  28. 28. Figure 3.21 PPP frame
  29. 29. 3.3 Switched WANs The backbone networks in the Internet are usually switched WANs. A switched WAN is a wide area network that covers a large area (a state or a country) and provides access at several points to the users. Inside the network, there is a mesh of point-to-point networks that connects switches. The switches, multiple port connectors, allow the connection of several inputs and outputs. The topics discussed in this section include: X.25 Frame Relay ATM
  30. 30. Figure 3.22 Frame Relay network
  31. 31. A cell network uses the cell as the basic unit of data exchange. A cell is defined as a small, fixed-size block of information. Note:
  32. 32. Figure 3.23 ATM multiplexing
  33. 33. Figure 3.24 Architecture of an ATM network
  34. 34. Figure 3.25 Virtual circuits
  35. 35. Note that a virtual connection is defined by a pair of numbers: the VPI and the VCI . Note:
  36. 36. Figure 3.26 An ATM cell
  37. 37. Figure 3.27 ATM layers
  38. 38. The IP protocol uses the AAL5 sublayer. Note:
  39. 39. We will discuss IP over ATM in Chapter 23. Note:
  40. 40. 3.4 Connecting Devices LANs or WANs do not normally operate in isolation. They are connected to one another or to the Internet. To connect LANs or WANs, we use connecting devices . Connecting devices can operate in different layers of the Internet model. We discuss three kinds of connecting devices: repeaters (or hubs), bridges (or two-layer switches), and routers (or three-layer switches ). Repeaters and hubs operate in the first layer of the Internet model. Bridges and two-layer switches operate in the first two layers. Routers and three-layer switches operate in the first three layers The topics discussed in this section include: Repeaters Hubs Bridges Router
  41. 41. Figure 3.28 Connecting devices
  42. 42. Figure 3.29 Repeater
  43. 43. A repeater connects segments of a LAN. Note:
  44. 44. A repeater forwards every bit; it has no filtering capability. Note:
  45. 45. A repeater is a regenerator, not an amplifier. Note:
  46. 46. Figure 3.30 Function of a repeater
  47. 47. A bridge has a table used in filtering decisions. Note:
  48. 48. Figure 3.31 Bridge
  49. 49. A bridge does not change the physical (MAC) addresses in a frame. Note:
  50. 50. Figure 3.32 Learning bridge
  51. 51. A router is a three-layer (physical, data link, and network) device . Note:
  52. 52. A repeater or a bridge connects segments of a LAN. A router connects independent LANs or WANs to create an internetwork (internet). Note:
  53. 53. Figure 3.33 Routing example
  54. 54. A router changes the physical addresses in a packet. Note:

×