Ethernet frame Preamble Start frame delimiter(SFD) Destination address(da) Source addreSs(sa) Length/type Data Cycle Redundancy Check(CRC) CSIE NTUT TANAN
CSIE, NTUT, TAIWAN 11 Ethernet Frame • Preamble • Start frame delimiter (SFD) • Destination address (DA) • Source address (SA) • Length/type • Data • Cycle Redundancy Check (CRC)
Ethernet frame Preamble 56 bits of alternating ls and Os SFD Start field delimiter, flag(10101011) Destination Source Length Preamble SFD address address PDU Data and padding CRC 7 bytes 1 byte 6 bytes 6 bytes 2 bytes 4 bytes CSIE NTUT TANAN Figure 3-4
CSIE, NTUT, TAIWAN 12 Figure 3-4 Ethernet Frame
Ethernet Implementation Transceiver cable maximum 50 meters 15-pin 15 -pin connector BNc-connector connector and terminator Transceiver Thick coaxial cable maximum 500 meters Tap a. 1OBASE5 CSIE NTUT TANAN Figure 3-5: a
CSIE, NTUT, TAIWAN 13 Figure 3-5:a Ethernet Implementation
Ethernet lmplementation NIC with transceiver BNC-connector and terminator Thin coaxial cable BNC-Tee maximum 185 meters b 10BASE2 CSIE NTUT TANAN Figure 3-5: b
CSIE, NTUT, TAIWAN 14 Figure 3-5:b Ethernet Implementation
Ethernet Implementation lOBASE-T Repeater Hub 凸·凸 UTP cable ■国■国■ C 10BASE-T CSIE NTUT TANAN Figure 3-5: c
CSIE, NTUT, TAIWAN 15 Figure 3-5:c Ethernet Implementation