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Ethernet CCNA Exploration Semester 1 Chapter 9
Ethernet ,[object Object],[object Object],Ethernet Application Presentation Session Transport Network Data link Physical Application Transport Internet Network Access
Ethernet ,[object Object],[object Object],[object Object],[object Object],[object Object]
Ethernet history ,[object Object],[object Object],[object Object],Ethernet 802.3 802.2 MAC LLC
Sublayers ,[object Object],[object Object],[object Object],MAC LLC
Advantages of Ethernet ,[object Object],[object Object],[object Object],[object Object]
Shared medium ,[object Object],[object Object],[object Object]
Hubs and switches ,[object Object],[object Object],[object Object]
Hubs and switches Switch forwards frames only to the destination once the address is known. Hub forwards frames through all ports except incoming port.
Half duplex ,[object Object],[object Object]
Full duplex ,[object Object],[object Object],[object Object],[object Object]
Fast Ethernet, Gigabit Ethernet ,[object Object],[object Object],[object Object]
LAN, MAN, WAN ,[object Object],[object Object],[object Object]
Ethernet Frame Packet Packet Trailer Frame header Packet from Network layer is encapsulated Packet Data Frame Check Seq. 46-1500 4 Field size in bytes. Preamble and SFD are not counted in frame size. Frame is 64-1518 (later 1522) bytes. Preamble Destination address Start of frame delimiter Source address Length /type 7 1 6 6 2
Frame fields ,[object Object],[object Object],[object Object]
Frame fields ,[object Object],[object Object]
Frame fields ,[object Object],[object Object],[object Object]
Ethernet MAC address ,[object Object],[object Object],[object Object],[object Object],[object Object]
Writing a MAC address ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Different addresses ,[object Object],[object Object]
On a long journey… ,[object Object],[object Object]
Unicast, multicast, broadcast ,[object Object],[object Object],[object Object]
Collisions ,[object Object],[object Object],[object Object]
Hubs and Collision Domains ,[object Object],[object Object],[object Object],[object Object]
CSMA/CD ,[object Object],[object Object],[object Object],[object Object]
Listen for signals Are there signals on the cable? Yes .
Wait if there are signals Wait until there are no more signals
Listen for signals Are there signals on the cable now? No .
Put signals on cable Put my signals on the cable.
Listen for collisions: no No collision. All is well. My message was sent.
Listen for collisions: yes There is a collision. Stop sending signals. Send jamming signal. My message is lost.
Listen again No signals now. Wait for a random length of time. Send message again.
CSMA/CD ,[object Object],[object Object],All clear
CSMA/CD ,[object Object],[object Object],[object Object],[object Object]
Definitions ,[object Object],[object Object],[object Object]
Interframe spacing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Different bandwidths ,[object Object],[object Object],[object Object],Frame gone – too late Still sending frame
So… for CSMA/CD to work ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Get rid of collisions ,[object Object],[object Object],[object Object],[object Object],[object Object]
Legacy Ethernet ,[object Object],[object Object]
Fast Ethernet ,[object Object],[object Object]
Gigabit Ethernet ,[object Object],[object Object],[object Object]
10 Gbps Ethernet ,[object Object],[object Object],[object Object],[object Object]
Hub and Switch ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Hub Switch
Switching table ,[object Object],[object Object]
Flooding ,[object Object],[object Object]
Learning addresses ,[object Object],[object Object],[object Object],[object Object]
ARP table ,[object Object],[object Object],[object Object],[object Object]
Address resolution protocol ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Remote addresses ,[object Object],[object Object],[object Object],[object Object],[object Object]
Proxy ARP ,[object Object],[object Object],[object Object]
Labs & Activities * If no previous Packet Tracer experience, else strongly recommended Type Detail PT 1.2.4 Mandatory* Lab 1.3.1 Mandatory PT 1.3.2 Mandatory Lab 1.3.3 Review carefully
 

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Mod9

  • 1. Ethernet CCNA Exploration Semester 1 Chapter 9
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9. Hubs and switches Switch forwards frames only to the destination once the address is known. Hub forwards frames through all ports except incoming port.
  • 10.
  • 11.
  • 12.
  • 13.
  • 14. Ethernet Frame Packet Packet Trailer Frame header Packet from Network layer is encapsulated Packet Data Frame Check Seq. 46-1500 4 Field size in bytes. Preamble and SFD are not counted in frame size. Frame is 64-1518 (later 1522) bytes. Preamble Destination address Start of frame delimiter Source address Length /type 7 1 6 6 2
  • 15.
  • 16.
  • 17.
  • 18.
  • 19.
  • 20.
  • 21.
  • 22.
  • 23.
  • 24.
  • 25.
  • 26. Listen for signals Are there signals on the cable? Yes .
  • 27. Wait if there are signals Wait until there are no more signals
  • 28. Listen for signals Are there signals on the cable now? No .
  • 29. Put signals on cable Put my signals on the cable.
  • 30. Listen for collisions: no No collision. All is well. My message was sent.
  • 31. Listen for collisions: yes There is a collision. Stop sending signals. Send jamming signal. My message is lost.
  • 32. Listen again No signals now. Wait for a random length of time. Send message again.
  • 33.
  • 34.
  • 35.
  • 36.
  • 37.
  • 38.
  • 39.
  • 40.
  • 41.
  • 42.
  • 43.
  • 44.
  • 45.
  • 46.
  • 47.
  • 48.
  • 49.
  • 50.
  • 51.
  • 52. Labs & Activities * If no previous Packet Tracer experience, else strongly recommended Type Detail PT 1.2.4 Mandatory* Lab 1.3.1 Mandatory PT 1.3.2 Mandatory Lab 1.3.3 Review carefully
  • 53.