18 Questions
Which type of switching technique is giving way to packet-based IP technology?
Circuit switching
In packet-switched networks, how are messages transmitted?
Divided into packets and routed separately
Which type of switching technique requires a dedicated path to be established between the source and destination before data transfer?
Circuit switching
Which layer of the OSI model is circuit switching implemented in?
Physical layer
Which switching technique was initially designed for voice transfer?
Circuit switching
In packet switching, how are data packets routed from the source to the destination?
Through different paths
In circuit-switched networks, what kind of connection is established between the source and the destination?
A dedicated route
What technique is used in analog-based telephone transmission systems to transmit multiple voice frequencies over the same line?
Frequency Division Multiplexing (FDM)
In circuit-switched networks, what happens when there is silence during a conversation?
Silence is transmitted
Which of the following is a characteristic of packet-switched networks?
Data is transmitted in small chunks called packets
What is the difference between analog circuit switching (FDM) and digital circuit switching (TDM)?
FDM uses frequency division multiplexing, while TDM uses time division multiplexing
In circuit-switched networks, what happens when one party hangs up the call?
The connection remains until the other party hangs up
Which of the following is a characteristic of circuit switching?
It is suitable for long continuous transmissions like voice calls.
Which of the following is a disadvantage of circuit switching compared to packet switching?
It leads to poor utilization of resources.
Which of the following is a characteristic of packet switching?
It allows simultaneous usage of the same channel by multiple users.
In which switching technique are individual packets of the message received out of order and need to be reassembled at the destination?
Packet switching
Which of the following is a disadvantage of packet switching compared to circuit switching for applications like high-quality voice calls?
It is unsuitable for applications that cannot afford delays in communication.
Which layer of the OSI model is responsible for implementing packet switching?
Network Layer
Study Notes
Circuit Switching
- A connection-oriented network switching technique
- A dedicated path is established between the source and the destination before data transfer commences
- The path is relinquished once the data is transmitted
- It is inflexible in nature since data packets are routed along the same dedicated path
- Initially designed for voice transfer
- The entire message is received in the order sent by the source
- Implemented at Physical Layer
Circuit Switched Networks
- Connection-oriented networks
- A dedicated route is established between the source and the destination
- The entire message is transferred through it
- Originally developed for the analog-based telephone system
- Analog circuit switching (FDM) has given way to digital circuit switching (TDM)
- Digital circuit switching maintains the connection until broken
- Bandwidth is continuously reserved, and "silence is transmitted" just like digital audio
Analog Circuit Switch (FDM)
- A dedicated connection is made between two parties in analog-based telephone transmission systems
- Multiple voice frequencies are placed on the same line via frequency division multiplexing (FDM)
- Connections are maintained by all the switches the signals have to traverse
Packet Switching
- A connectionless network switching technique
- The message is divided and grouped into a number of units called packets
- Packets are individually routed from the source to the destination
- No need to establish a dedicated path from the source to the destination
- Each packet is routed separately, making it flexible in nature
- Initially designed for data transfer
- Packets may be received out of order, requiring reassembly at the destination
- Implemented at Network Layer
Packet Switched Networks
- Connectionless networks
- The message is divided and grouped into a number of units called packets
- Packets are individually routed from the source to the destination
- It is a store and forward transmission
- Data is processed and transmitted, not only at the source but at each switching station
Comparison of Circuit Switching and Packet Switching
- Circuit switching is suitable for long continuous transmission, like voice calls
- Packet switching is unsuitable for applications that cannot afford delays in communication, like high-quality voice calls
- Circuit switching guarantees better resource utilization, but has poor bandwidth usage
- Packet switching ensures better bandwidth usage, but has a higher initial cost
- Circuit switching has a high time required to establish a connection, while packet switching has a lower delay in delivery of packets
Test your knowledge on the differences between circuit switching and packet switching technologies. Learn about how packet switched networks function and how messages are routed from the source to the destination. Engr.Ruel G.Grafia, MSIT provides insights on circuit and packet-switching techniques.
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