essential concepts:
are taken from a table.
packet is compared to a destination network address entry in the routing table located in main
memory. The frame is then rewritten with the destination address and sent to the exit interface.
stores the forwarding information in cache. This allows the entries in the route caches to be
created. Subsequent packets are compared against the cached information. Fast switching
enables higher throughput by switching a packet using a cache created by previous packets.
through the route processor cannot be captured. Disable fast switching when sending data to
interfaces lower than T1. Congestion can occur when fast-switched packets are sent from a
high-speed interface to a low-speed interface.
WAN bandwidth bottlenecks, the most effective is compression.
across the network. Compression works by identifying a redundant pattern in a data stream and
providing a coding scheme at each end of a transmission link. These coding schemes allow
characters to be removed from the frames of data at the sending side of the link and then be
replaced correctly at the receiving side. Because the frames take up less bandwidth, more data
can be transmitted.