Chapter 5 Modern Ethernet Pg 115-119

Implementing Multiple Types of Gigabit Ethernet

10 Gigabit Ethernet
         - shows up in high-level LANs
         - fiber and copper standards
      
Fiber-based 1- GbE
         -  standardized by type of fiber used, wavelength of the lasers, and physical
layer signaling type
         - also define maximum signal distance
         - standards have names that start with "10GBase" and end in xy
         - x stands for type of fiber used
         - y code is always R ( for LAN-based signaling devices) and W for (SONET/WAN)
         - when x = S, S means short or 850nm over multimode fiber
              -> max fiber length being 300 Meters
         - when x - L, L means long or 1310 nm over single mode fiber
              -> max fiber length being 10 Kilometers
         - 10BaseLR connects LANS
         - 10BaseLW connects SONET
         - when x=E, E means Extra Long or 1550nm
                -> max fiber length of 40 Kilometers
      
The Other 10 Gigabit Ethernet Fiber Standards
         - 10BaseL4
               -> uses four lasers
               -> 1300nm wavelength
               -> legacy fiber
               -> 300 Meter max length
               -> multimode cable
          - 10BaseLRM
               -> long wavelength
               -> over legacy fiber
               -> max range of 220 meters
           - 10BaseZR
               -> not part of the IEEE standards
               -> uses 1550 nm wavelength
               -> max range of 80 Km

Copper-based 10GbE
           -running on twisted-pair cabling
           - called 10GBaseT
           - maximum cable length of only 55 meters with CAT6
           - maximum cable length of 100 meters with CAT6a