- Strengths:
- Broadcast network is
cheap
(but can only support a small number of computers)
- Switched networks
can deliver messages
to only the
intended receiver
(but the hardware cost is very high)
- Broadcast network is
cheap
- Combining the
strengths
of both types of
networks:
- Build small networks
with
(cheap) broadcast hardware
(for each department):
- Interconnect
the broadcast networks
together into a
larger network using
switching technology:
- Build small networks
with
(cheap) broadcast hardware
(for each department):
- Fact:
- Most messages transmitted between computers are between computers on the same (broadcast) network
Analogy:
- People often talk
to their neighbors.
People sometimes will talk to their distant relatives
- Therefore:
- Most
messages will be transmitted
only on the
broadcast network:
The local transmissions will not be transmitted to other (broadcast) networks
- Most
messages will be transmitted
only on the
broadcast network:
- Note:
- All nodes on the same broadcast network as the transmission will receive the transmission....
- Non-local transmissions
are processed as
follows:
- the sender sends the
message on its
broadcast network
- The router (switch) connected on that broadcast network will forward the message to the destination (broadcast) network
Note:
- All computers:
- on the source network and
- on the destination network
will receive the transmission !!!!
- the sender sends the
message on its
broadcast network