10 Gigabit Ethernet Work on the 10 Gbps Ethernet interface started in late 1990s and
was driven by improvements in high-speed electronics and lasers. A major goal of this
effort was to scale to ten times the aggregation of Gigabit Ethernet for a small multiple
of its price (two to three times). Another aim was to project Ethernet well out of
the LAN as a genuine ???carrier-grade??? solution, i.e., LAN-MAN-WAN convergence. The
first 10 Gigabit Ethernet specifications (IEEE 802.3ae) emerged in 2002 and defined
full-duplex operation without carrier-sensing multiple-access with collision detection
(CSMA/CD) operation. However, Ethernet frame formats were maintained to ensure
interoperability and protect existing investments.
Given many potential applications, 10 Gigabit Ethernet interfaces support a wide
range of distances and fiber types, as detailed in Table 8.4. In particular, the standards
define two physical interface layers, one for LAN and the other for MAN/WAN. The former
supports full 10 Gbps bit rates (10.3 Gbps clock rate) and runs over SMF (1300
nm) or DWDM (1550 nm). Meanwhile, the latter defines a new WAN interface sublayer
(WIS), i.
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