15 Questions
How are voice channels connected in the example of a circuit-switched network with 4-kHz voice channels?
Each link uses FDM to connect a maximum of two voice channels
In a circuit-switched network, how are connections between two stations established?
Through dedicated paths made of one or more links
What is the characteristic of resources in circuit switching during data transfer?
Resources remain dedicated for the entire duration of data transfer
What is used to divide each link in a circuit-switched network into n channels?
FDM or TDM
What controls the connections in a circuit-switched network?
The switch
In a circuit-switched network, what is the characteristic of resources during the entire duration of data transfer?
Dedicated
In a circuit-switched network, how is a connection between two stations established?
Through a dedicated path made of one or more links
What is used to divide each link in a circuit-switched network into n channels?
FDM or TDM
What technology is used to connect voice channels in a circuit-switched network example with 4-kHz voice channels?
FDM
What type of network is made of switches connected by physical links, with each link divided into n channels?
Circuit-switched network
In Boolean algebra, what is used to represent don't care cases instead of 1's and 0's?
X
In simplifying Boolean expressions with don't care conditions, what can be used instead of X based on the case of the map?
0 or 1
If we would like to simplify a map based on Sum of Products (SOP), what can be used to make the simplification easier?
Don't care conditions
In the context of Boolean algebra, if a function has don't care conditions d(a,b,c)=Σ(2,3,7), what does this indicate?
'X' can be '1'
When finding the Sum of Products (SOP) expression for F(a,b,c)=Σ(1,3,4,5), what is the correct SOP expression?
$F=AB’+A’C$
Study Notes
Circuit-Switched Networks
- In a circuit-switched network, voice channels are connected using Frequency Division Multiplexing (FDM), where each link is divided into n channels, and each channel is 4-kHz wide.
- Connections between two stations are established by dialing a phone number, which triggers a series of events, including signaling, connection establishment, and data transfer.
- Resources in circuit switching are dedicated to a single connection during the entire duration of data transfer.
- A circuit-switched network is a type of network made up of switches connected by physical links, with each link divided into n channels.
Boolean Algebra
- In Boolean algebra, 'X' or 'don't care' is used to represent cases where the output of a logic gate doesn't depend on the input variable.
- When simplifying Boolean expressions with don't care conditions, a map can be used instead of 'X' based on the case of the map.
- A K-map (Karnaugh map) can be used to simplify a Boolean expression, making it easier to find the Sum of Products (SOP) expression.
- In Boolean algebra, a function with don't care conditions, such as d(a,b,c)=Σ(2,3,7), indicates that the output is 'X' or 'don't care' for the specified input values.
- The correct SOP expression for F(a,b,c)=Σ(1,3,4,5) is the sum of the minterms for the specified input values.
Test your knowledge of switching and routing with this quiz covering topics such as switched network taxonomy, circuit-switched networks, phases, efficiency, and more.
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