Packet scheduling (Scenario 1, RR). Consider the pattern of red and green packet arrivals to a router's output port queue, shown below. Suppose each packet takes one time slot to be transmitted, and can only begin transmission at the beginning of a time slot after its arrival. Indicate the sequence of departing packet numbers (at t = 1, 2, 3, 4, 5, 7, 8) under round robin scheduling, where red starts a round if there are both red and green packets ready to transmit after an empty slot. Give your answer as 7 ordered digits (each corresponding to the packet number of a departing packet), with a single space between each digit, and no spaces before the first or after the last digit, e.g., in a form like 7 6 5 4 3 2 1). arrivals packet in service departures 123 4 5 ↓↓ ????? 1 2 3 4 67 ?? 6 7 8

Packet scheduling (Scenario 1, RR). Consider the pattern of red and green packet arrivals to a router's output port queue, shown below. Suppose each packet takes one time slot to be transmitted, and can only begin transmission at the beginning of a time slot after its arrival. Indicate the sequence of departing packet numbers (at t = 1, 2, 3, 4, 5, 7, 8) under round robin scheduling, where red starts a round if there are both red and green packets ready to transmit after an empty slot. Give your answer as 7 ordered digits (each corresponding to the packet number of a departing packet), with a single space between each digit, and no spaces before the first or after the last digit, e.g., in a form like 7 6 5 4 3 2 1). arrivals packet in service departures 123 4 5 ↓↓ ????? 1 2 3 4 67 ?? 6 7 8

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

100%

ed
ers
Packet scheduling (Scenario 1, RR). Consider the pattern of red and green packet
arrivals to a router's output port queue, shown below. Suppose each packet takes one
time slot to be transmitted, and can only begin transmission at the beginning of a time
slot after its arrival. Indicate the sequence of departing packet numbers (at t = 1, 2, 3,
4, 5, 7, 8) under round robin scheduling, where red starts a round if there are both red
and green packets ready to transmit after an empty slot.
Give your answer as 7 ordered digits (each corresponding to the packet number of a
departing packet), with a single space between each digit, and no spaces before the
first or after the last digit, e.g., in a form like 7 6 5 4 3 2 1).
arrivals
packet in
service
departures
1325476
1324576
t
1 2 3 4 5
Į
?
??
0 1 2
? ?
3 4 5
67
9
? ?
7 8
Not quite. One of more of your packets are in the incorrect order.

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Packet scheduling. Consider the same pattern of red and green packet arrivals to a router's output port queue, shown below. Suppose each packet takes one time slot to be transmitted, and can only begin transmission at the beginning of a time slot after its arrival. Indicate the sequence of departing packet numbers (at t = 1, 2, 3, 4, 5, 6, 7) under round robin scheduling. Assume a round-robin scheduling cycle begins with green packets. Give your answer as 7 ordered digits (each corresponding to the packet number of a departing packet), with a single space between each digit, and no spaces before the first or after the last digit, e.g., in a form like 7 6 5 4 3 2 1). [Note: You can find more examples of problems similar to this here.] arrivals packet in service departures 1 234 0 5 2 67 ??????? 3 4 5 6
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