Chapter 2

Chapter 2

1. Ethernet

   • Family of LAN standards that define the physical and data link layer

2. Ethernet standards

3. Components of an Ethernet link

   • The RJ-45 connector is slightly wider, but otherwise similar, to RJ-11 connectors commonly used for telephone cables.

4. Crossover Cable Pinout

   • The crossover cable pinout crosses the pair at the transmit pins of each device to receive pins on the opposite device.

5. Choosing the Right Cable Pinouts

6. Ethernet Data Link Protocols

   • Defines the Ethernet Frame: an Ethernet header at the front, the encapsulated data in the middle, and an Ethernet trailer at the end.

7. Error Detection with FCS

   • The Ethernet Frame Check Sequence (FCS) field in the Ethernet trailer gives the receiving node a way to compare results with the sender, to discover whether errors occurred in the frame.

8. Half-duplex and Full-duplex

   • Half-duplex: Login in which a port sends data only when it is not also receiving data; in other words, it cannot send and receive at the same time. Full-duplex: The absence of the half-duplex restriction.

9. Full- and Half-duplex in an Ethernet LAN

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