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 timeslot 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 (eachcorresponding 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 aform like 7 6 5 4 3 2 1).[Note: You can find more examples of problems similar to this here.]arrivalspacketin servicedepartures1 23405267???????3 45 6

Dear Student, The following steps are performed - Step 1: Using round robin scheduling, the packets…

to be transmitted, and can only begin transmission at 4, 5, 6, 7) under round robin scheduling. Assume a ro esponding to the packet number of a departing packet like 7 6 5 4 3 2 1). You can find more examples of problems similar to this here.) arrivals packet in service epartures 1234 5 67 ??????? 3 5 6

to be transmitted, and can only begin transmission at 4, 5, 6, 7) under round robin scheduling. Assume a ro esponding to the packet number of a departing packet like 7 6 5 4 3 2 1). You can find more examples of problems similar to this here.) arrivals packet in service epartures 1234 5 67 ??????? 3 5 6

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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1 Suppose we need to design a stop-and-wait, reliable data transfer protocol between a sender A and a receiver B, over a direct link with the following characteristics. • The channel from A to B is unreliable and can lose packets. • The channel from B to A is reliable. • Neither channel will corrupt a packet (if a packet is received, it must be correct). • Neither channel will reorder packets. The maximum RTT between A and B is known and is guaranteed to be D. For each of the following techniques for building reliable data transfer protocol, please match on whether or not, it is needed in the design of the protocol. . Acknowledgement Negative Acknowledgement Sequence Number Timeout Choose... + Choose... + Choose... + Choose... +
3. Suppose Host A send two TCP segments back to back to Host B over a TCP connection. The first segment has sequence number 90; the second has sequence number 110. a) How much data is in the first segment? b) Supposed that the first segment is lost but the second segment arrived at Host B. In the acknowledgement that Host B sends to Host A, what will be the acknowledgement number?
a) The sender in the Stop and Wait protocol waits for an ACK before delivering the following packet. But what if an ACK is lost in transit and never reaches the sender? In that scenario, what should the sender do? b) A sender process sends 100 packets to a receiver process. Out of 100 packets, 80 make it to their destination, while 20 are lost in the network. How many ACKs will the receiver send to the sender when using: ACK (acceptable/normal ACK) • NACK (not acceptable) c) Why do we require a length field in the UDP header since the length of the UDP header is always the same (i.e. 8 bytes)?
Suppose station X sends a message with 15 packets to station B using sliding window of size 4, selective repeat in used and every 5th packet is lost, number of transmission required to send all 15 packets to Y.
A series of packets may be sent from one site to another utilising the same route between the two hosts. Please include all of the parts that make up a single packet's end-to-end latency. Will one of the delays last a certain period of time while the other's duration is more erratic?
Between two hosts, a single connection may deliver several packets if necessary. Please provide a breakdown of the timeframes required for processing freight. Is it to be anticipated that one delay will continue for a certain length of time while the other delay may be modified?
If a host has received the following segments in TCP:[1, 1000], [4001, 5000], [5001, 6000], [1, 1000]. (1)Show the contents of SACK option to be sent.
Assume for the sake of this example that a packet is being sent from a source to an address at the other end of the network via the fixed route. List all the delays' varied causes as well: How many delays are roughly time-dependent and how many are roughly continuous for how long?
To achieve totally-ordered multicasting with Lamport timestamps, is it strictly necessary that each message is acknowledged?
2.
b) Assuming two 1 Mbps Ethernet LANS (LAN Y and LAN Z) are connected by a bridge. An application in LAN Y sends 32 packets per second to LAN Z. Each IP packet has total size of 1480 bytes (excluding the preamble and cyclic redundancy check (CRC)). Assuming the inter-frame gap (IFG) is 9.6us, determine: i) The total size of the frame. ii) The time taken for the frame to send through LAN Z.