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Ethernet

Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

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Page 1: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

Ethernet

Page 2: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

Broadcast  and  Collision

Page 3: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

MAC

Page 4: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

CSMA/CD

Page 5: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

Reality  Check

Page 6: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

NetStep  Challenge

HTTP HTTP

Drops the frame Sends out a Layer 3 broadcast message

sends out an ARP request with the destination IP address

Page 7: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

NetStep  Challenge

I  AM  NOT  SAYING  ……..  I  AM  JUST  SAYING

Drops the frame Sends out a Layer 3 broadcast message

sends out an ARP request with the destination IP address

Page 8: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

NetStep  Challenge

In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.

In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting

After a collision, all stations involved run an identical back off algorithm and then synchronize with each other prior to transmitting data.

After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired. all stations have equal priority to transmit data.

Page 9: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

NetStep  Resolution

In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.

In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting

After a collision, all stations involved run an identical back off algorithm and then synchronize with each other prior to transmitting data.

After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired. All stations have equal priority to transmit data.

I  AM  NOT  SAYING  ……..  I  AM  JUST  SAYING

Page 10: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

NetStep  Challenge

Ports 48

VLANs 4

Page 11: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

NetStep  Resolution

I  AM  NOT  SAYING  ……..  I  AM  JUST  SAYING

Collision 48

Broadcast 4

Page 12: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

NetStep  Challenge

Router Hub Hub

Page 13: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

NetStep  Resolution

Router Hub Hub

I  AM  NOT  SAYING  ……..  I  AM  JUST  SAYING

Collision Domain

Collision Domain

Page 14: Ethernet’ · 2015-07-11 · NetStep. Challenge ’ In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. In a CSMA/CD collision domain,

Ethernet