Packet Switching Technologies and
We learned bridging as a means for inter-connecting LAN by
using a node working in promiscuous mode.
That is, it accepted frames from all inputs and forwarded
them to the appropriate output port.
But it was det
VIRTUAL PRIVATE NETWORKS
Controlled connectivity or private networking on a
A logical pt. to pt. connection across connectionless IP
An alternative to leased line ATM networks.
Three critical functions:
Lower cost, easier managem
We have learned Basic Building Block terms:
Links, Nodes (Switches, Routers, Hosts), Protocols,
Addresses, Routing and Storing & Forwarding.
Details of each as we move ahead.
2 Key special purpose H/W components to focus on:
Data Link Protocol Issues
So far, we have looked at Encoding and Framing as 2 of
the key issues with Data Link Protocols.
The process of converting binary data into signals and visaversa.
Occurs on the NIC.
GENERAL SUMMARY & ISSUES
The various technologies that we use in our WAN each
have different packet formats and sizes.
Some are even wasteful in that they require room for
identification, addressing and control information in
the headers and trailers.
Other administrative questions?
What is a network?
What does a network consist of?
Another perspective of a network
Part II Lecture Outline
Test I Results
Introduction to Switched Network
Bridges, switches and forwarding
Packet Switching Algorithms.
T 3/11: Packet Switching H/W and fabric
R 3/13: AT
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Define your own C
Switches can be used to extend the LAN.
Switches can must handle everything that comes to them.
We accept a degree of latency when using a Switch.
Bandwidth or throughput can be increased n-fold when
How switches determine and learn
We started by defining some network building blocks
and terms while visualizing various connections.
Next, we have looked at how application data:
Then, we see learned:
Moves down the various OSI levels.