Figure 4-5: Data Link Using Multiple Switches, Continued Received Original Received Regenerated Signal Received Signal Signal Signal Regenerated Signal Signal Thanks to regeneration, signals can travel far across a series of switches 4-16
4-16 Figure 4-5: Data Link Using Multiple Switches, Continued Original Signal Received Signal Received Signal Received Regenerated Signal Signal Regenerated Signal Thanks to regeneration, signals can travel far across a series of switches
Figure 4-5: Data Link Using Multiple Switches, Continued Received Original Received Regenerated Signal Received Signal Signal Signal Regenerated signal Signal UTP 62.5/125 UTP Multimode Fiber 100BASE-TX 1000BASE-SX 100BASE-TX (100 m maximum)(220 m maximum) (100 m maximum Physical Link Physical Link Physical Link Each trunk line along the way has a distance limit 4-17
4-17 Figure 4-5: Data Link Using Multiple Switches, Continued Original Signal Received Signal Received Signal Received Regenerated Signal Signal Regenerated Signal UTP 62.5/125 UTP Multimode Fiber 100BASE-TX (100 m maximum) Physical Link 100BASE-TX (100 m maximum) Physical Link 1000BASE-SX (220 m maximum) Physical Link Each trunk line along the way has a distance limit
Figure 4-5: Data Link Using Multiple Switches, Continued Received Original Received Regenerated Signal Received Signal Signal Signal Regenerated Signal Signal UTP 62.5/125 UTP Multimode Fiber 100BASE-TX 1000BASE-SX 100BASE-TX (100 m maximum )(220 m maximum)(100 m maximum) Physical Link Physical Link Physical Link Station-to-station data link does not have a maximum distance (420 m maximum distance in this example) 4-18
4-18 Figure 4-5: Data Link Using Multiple Switches, Continued Station-to-station data link does not have a maximum distance (420 m maximum distance in this example) Original Signal Received Signal Received Signal Received Regenerated Signal Signal Regenerated Signal UTP 62.5/125 UTP Multimode Fiber 100BASE-TX (100 m maximum) Physical Link 100BASE-TX (100 m maximum) Physical Link 1000BASE-SX (220 m maximum) Physical Link
Ethernet Data Link MAc) Layer Standards 802 Layering Frame Syntax Switch Operation
Ethernet Data Link (MAC) Layer Standards 802 Layering Frame Syntax Switch Operation
Figure 4-6: Layering in 802 Networks, Continued TCP/IP Internet Other Internet Internet Layer The 802 LAN/ MAN Standards Committee Logical subdivided the data link layer Link Contro The media access control (MAC)layer Data Layer handles details specific to a Link particular technology(ethernet 802.3 Layer Media 802. 11 for wireless LANS, etc. Access ds Control Layer The logical link control layer handles some general functions Connection to the internet layer, etc. t Not important to corporate Physical Layer networking professionals (80211ltc) 4-20
4-20 Figure 4-6: Layering in 802 Networks, Continued TCP/IP Internet Layer Standards (IP, ARP, etc.) Other Internet Layer Standards (IPX, etc.) 802.2 Ethernet 802.3 MAC Layer Standard Physical Layer Media Access Control Layer Non-Ethernet MAC Standards (802.5, 802.11, etc.) 100BASETX 1000 BaseSX … Logical Link Control Layer Non-Ethernet Physical Layer Standards (802.11, etc.) Data Link Layer Internet Layer The 802 LAN/MAN Standards Committee subdivided the data link layer The media access control (MAC) layer handles details specific to a particular technology (Ethernet 802.3, 802.11 for wireless LANs, etc.) The logical link control layer handles some general functions: Connection to the internet layer, etc.; Not important to corporate networking professionals