Lecture 1 Flashcards
What is the idea behind circuit switching? What is the main example of this?
The main idea behind circuit switching is to establish a dedicated communication path between two endpoints for the duration of a session. This path is reserved exclusively for the communicating parties and remains constant throughout the connection, ensuring a fixed bandwidth and predictable performance.
Traditionally used for: Traditional Telephone Networks: Circuit switching was the foundation of the Public Switched Telephone Network (PSTN), where a dedicated line was reserved for the duration of a phone call.
What are the four key features of circuit switching?
What is the main idea behind packet switching?
What are the five key features of packet switching?
Where is packet switching primarily used?
What are the differences between circuit switching and packet switching? Name 8
What is statitsical multiplexing? What are two drawbacks?
The idea behind statistical multiplexing is to share a single communication channel among multiple users by dynamically allocating resources based on demand, rather than reserving fixed amounts of bandwidth for each user. This approach leverages the fact that not all users require the channel simultaneously or at constant rates.
What are the five key concepts of statistical multiplexing?
What are the six potential problems with statistical multiplexing? What are the main ones?
1,2, 6
How do networks typically communicate?
What is the difference between bandwith and throughput?
What is latency? (incl. formula)
The total time it takes for data to travel from the source to the destination. It includes all forms of delay (propagation, processing, and queuing) and is often used as a general measure of responsiveness in a network.
What is delay?
A component of latency, representing the time taken for a specific part of data transmission.
What are round-trip times?
The time it takes for a signal to travel from the source to the destination and back again. RTT is often used to measure the responsiveness of a network and includes latency for both directions plus any additional delays.
What is the signal propagation? (formula)
What is the transmit time? (formula)
What is the definition of bandwidth-bound, cause, and keymetrics?
What is the definition of delay-bound, cause, and key metrics?
What are mice and elephants?
What is the hourglass model?
What are the key concepts of the hourglass model? 3
What is the ISO reference model?
What is the idea of the Physical Layer?
What is the idea of the Data Link Layer?
What is the idea of the Network Layer?
What is the idea of the transport layer?
What is the idea of the session layer?
What is the idea of the presentation layer?
What is the idea of the application layer?
