Ethernet概論

• 起源
• 限制
• OSI 的連結
• 種類

Ethernet

• Designed by Digital Equipment Corporation, Intel Corporation and Xerox Corporation.
• Later became an international standard with the IEEE 802.3 specification.

佈線選擇

• Four common cables used:
  1. 10BASE5 (Thicknet)
  2. 10BASE2 (Thinnet)
  3. 10BASE-T (UTP)
  4. 10BASE-F (Fiber)

Cable 最大長度限制

*(Attachment Unit Interface) Ethernet Drop Cable

10BASE5 (Thicknet)

10BASE5 Specifications

• Data Transfer Rate 10 Mbps
• Maximum Segment Length 500 m (1640 ft)
• Maximum Network Length 2,500 m (8,200 ft)
• Maximum Drop Cable Length 50 m
• Maximum Node Separation 5 segments (4 repeaters)
• Maximum Taps/Segment 100
• Minimum Distance 2.5 m (8 ft)
  between taps.

10BASE2 (Thinnet)

10BASE2 Specifications

• Data Transfer Rate 10 Mbps
• Maximum Segment Length 185 m (600 ft)
• Maximum Network Length 925 m (3,035 ft)
• Maximum Node Separation 5 segments (4 repeaters)
• Maximum Taps/Segment 30
• Minimum Distance 0.5 m
  between taps.

10BASE-T (UTP)

真實世界佈線連接