1. 校時(SYNC)
  2. 802.3 MAC frame format
    1. untagged
      1. Topic
      2. preamble
      3. SFD(start of frame delimiter)
      4. DA(destination address)
      5. SA(source address)
      6. T/L(type/length)
        1. <1500:length
        2. >1500:type
      7. DATA(46~1500byte)
      8. FCS(frame check sequence)
        1. 錯誤檢查碼
    2. tagged
      1. Vlan protocal ID
      2. tag control
  3. frame transmission &reception
    1. little endian
  4. half/full duplex
    1. half duplex
      1. 同時間只能有一方傳輸
    2. full duplex
      1. 可同時傳送
      2. 無CSMA/CD問題
      3. switch需支援
      4. simulations
      5. P2P link
      6. 網卡支援
  5. flow control
    1. 傳送速度>接收速度
    2. half duplex解法
      1. back pressure
        1. 假封包 降低傳送速度
        2. Force collision
    3. full duplex解法
      1. pause frame
  6. Gigabyte half duplex challenge
    1. collision 可能產生
    2. 最終使用full duplex
  7. 10 gigabyte ethernet 802.3ae
    1. full duplex
    2. 向下相容
    3. LAN->WAN
  8. CSMA/CD
    1. goal
      1. 共享medium
      2. carrier sense
        1. listen before transmitting
      3. multiple access
        1. multiple channel
      4. CD
        1. 停著等
    2. Topic