PGPS implementation: select all statements that are true A. virtual time slows down when there are more flows going through the link where PGPS is used B. virtual time increases fa... PGPS implementation: select all statements that are true A. virtual time slows down when there are more flows going through the link where PGPS is used B. virtual time increases faster when the network experiences congestion C. an arriving packet from a flow is stamped with the current system virtual time as its virtual starting time D. the virtual transmission time of a packet p of a flow i is independent of the packets of flow i that arrive before p E. the departure order of packets of flow i from the link is the same as the order in which these packets arrive to the link, assuming no packet loss and retransmission
Understand the Problem
The question is asking us to evaluate a set of statements related to PGPS (Proportional-Integral Gravity Layer Scheduling) implementation and determine which of them are true. Each statement presents a different aspect of how PGPS works in managing packet flows in a network.
Answer
A and C are true about PGPS implementation.
The true statements about PGPS are: A. Virtual time slows down when there are more flows going through the link where PGPS is used and C. An arriving packet from a flow is stamped with the current system virtual time as its virtual starting time.
Answer for screen readers
The true statements about PGPS are: A. Virtual time slows down when there are more flows going through the link where PGPS is used and C. An arriving packet from a flow is stamped with the current system virtual time as its virtual starting time.
More Information
PGPS, or Packet Generalized Processor Sharing, involves the use of virtual time to manage packet scheduling and distribution of bandwidth among contending flows. Understanding the behavior of virtual time is crucial for managing network congestion and fairness.
Tips
A common mistake is assuming virtual time increases independently of network load, but it actually depends on the number of flows.
Sources
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