Ethernet and the physical layer
Topic 2 of 26. 0 questions:
What this topic covers
- Ethernet frame format preamble MACs EtherType FCS
- MAC address structure OUI and unicast multicast bits
- copper categories Cat5e Cat6 Cat6A and distances
- straight through vs crossover and Auto-MDIX
- single-mode vs multimode fiber and distances
- connectors LC SC MPO
- SFP SFP+ QSFP and transceiver types
- speed duplex and autonegotiation
- duplex mismatch symptoms late collisions
- CSMA/CD and why full duplex removed it
- MTU 1500 and jumbo frames
- CRC errors runts giants
- PoE standards 802.3af at bt and budgets
- 10G 25G 40G 100G and lanes
- optical power dBm and light levels
Study it in depth on Octet.