(It is also assumed that the enterprise will need 622M of capacity some
44 Note??“Ethernet access is the service here; just a connectivity service that entails a single physical
Ethernet connection.
45 In fact, most devices have a Network Interface Card operating at 10/100M, i.e., either at 10 or 100.
46 If 100M costs $X, then 1000M costs cost roughly three times $X; cost per bit using 100M = $X/100M,
using 1000M = 3 ?— $X/1000M = 0.3X (cost per bit using 100M)
47 Admittedly, though, this may not be as severe because of the nature of data traffic, which typically has
only some peaks interspersed with more modest traffic demands.
Ethernet: From LAN to the WAN 33
12 months later). At this point, however, the customer has two options to get to 500M
in the case of SONET/TDM access:
?– The customer can look at the next capacity available (i.e., OC-12 (622M)) but will
then have to pay an extra amount for the additional 122M capacity that the customer
will not use for another 12 months.
?– The customer can defer until it needs the full 622M (12 months later); in this case,
the customer is obviously making do with severely limited bandwidth capacity,
which will inevitably have an adverse impact on the customer applications (at
least for another 12 months).
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