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Animation 16_1 |
Hosts and routers consult routing tables to forward IP datagrams.
Each host or router looks in its routing table to determine the next
hop to the destination. If the routing tables are changed, IP
datagrams will follow different paths to the destination.
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Figure 12.4 |
An inverse mux using two T1 circuits to provide a connection
with twice the capacity. Inverse multiplexing is attractive economically
for intermediate capacities because two T1 circuits are much less expensive
than a T3 circuit.
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Figure 12.6 |
Illustration of an STS-1 SONET frame with 810 octets divided into 9
rows of 90 columns. Octets at the beginning of each row provide
clock synchronization and maintenance information.
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Figure 12.7 |
ADSL modems connected to existing local loop wiring. The
modems can use a pair of wires simultaneously with analog
telephone service.
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Photo img4_110 |
The front of a Motorola cable modem showing its various indicators.
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Photo img4_111 |
The back of a Motorla cable modem. On the left is a standard coaxial
television cable connector. The modem sends and receives data over the
existing cable system infrastructure through this connection. On the
right is an RJ-45 Ethernet jack which connects the modem to a
computer.
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Photo img5_001 |
Motorola CyberSurfer Wave cable modem
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Photo img5_002 |
Motorola CyberSurfer Wave cable modem
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