163 14 Shared Networking 07 Bridging vs Switching

the lamps which is one of the most

popular objects that we have on our

networks today it's very high port

density providing very large frame

buffers where it can actually accept

more frames before it actually has to

begin dropping frames on a wire it does

have a mixture of port speeds and can

actually provide different technologies

and aggregation fast internal switching

is known as ASIC or application specific

integrated circuit it has different

types of modes where it can actually cut

frames while only reading the

destination MAC address or it can do a

complete store and forward mechanism or

the switch itself can examine the entire

frame and perform the CRC cyclic

redundancy check which means checking

the frame and using its frame check

sequence calculation to verify that the

frame has been received properly lamb

switches provide a lot of features for

promoting communications between devices

for example multiple simultaneous

conversations do two full duplexing

because of full duplex communications we

can now have several individuals use the

internet simultaneously or talk to other

servers at exactly the same time and not

have a problem at all with collision

domains we can also change media rates

going from 100 megabits and 10 megabits

to gigabit and 10 gigabit in fact many

of Cisco's land switches today offer a

mixture of speeds right out of the box

or an option of adding in modules to

actually change the media rates to be

able to do high scalability up links to

different areas of the network in

addition we have to think that the

primary reason that we have a land

switch is due to its capabilities in

micro segmentation