Page 81 - DCAP207_NETWORKS_DCAP406_COMPUTER_NETWORKS

Computer Networks/Networks

Notes Packet Switching is more modernize and new technology of switching and is a suitable and
affordable method of switching, while the circuit switching is an old and expensive method of
switching, which makes a prominent difference line between both and supports the topic of
Circuit Vs. Packet switching. The other Circuit Vs. Packet switching feature is the contention of
reliability and non-reliable method of switching.

Did u know? Circuit switching is more reliable then packet switching. Circuits switching
is reliable and ideal in all while the packet switching is ideal for VOIP (voice over internet
protocol).
A switching power supply circuit is an electronic power supply (PSU is the unit) which
automatically converts the characteristics of volts and current to another. Switching power
supply circuit also incorporates the switching regulator in order to be highly efficient. The main
advantage of the switching power supply circuit is to get the great provision of efficiency
because the switching transistor dissipates the little power and energy when it’s outside of the
range of its actual region. So, that the switching power supply circuit has an individual importance
of its and its efficiency remains same if the challenging situation of Circuit switching Vs. Packet
switching happens too.

Task Give one example each of the following:
1. Circuit switching

2. Packet switching
3. Message switching
4. Cell Switching

Self Assessment

Fill in the blanks:

6. The classic “forward voice mail” capability in some voice mail systems is an example of
………………………. switching.
7. A ………………………… power supply circuit is an electronic power supply (PSU is the
unit) which automatically converts the characteristics of volts and current to another.
8. Circuit switching is ………………. reliable then packet switching.
9. Packet switching which is also known as ………………… switching.

10. ……………………… is ideal for an integrated environment and is found within Cell-
based networks such as ATMs.

5.7 Summary

In this unit you have studied about various types of connecting devices such as hubs,
bridges, switches, routers and gateways.
Bridges are used to interconnect multiple LANs two devices at the data link layers of the
OSI model. Switches are used for performing bridges functions as well as point-to-point
dedicated connections.

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