06-2 exam_ans - Name(Print Email Address ECE3076 Final Exam answers RULES i This quiz is not open book Three original sheets of hand-written notes

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Name (Print) ______________________________ Email Address ECE3076 Final Exam p. 1 ECE3076 Final Exam - answers July 13, 2006 RULES. i This quiz is not open book. Three original sheets of hand-written notes may be used. Calculators are ok. ii Answer all questions and show all work to receive full credit. Use back of sheets only if necessary. iii Please do not ask the proctors any questions during the exam about exam questions. Part of the test is understanding the question, as written, without supplemental information. If you feel additional data is needed to solve the problem, make (and state) an assumption and then work the problem. iv. This is a time-limited test. All papers must be turned in 120 minutes after the start. If you find you are taking more than 10 minutes on a particular problem, move on and come back to that problem after finishing the others. v. The Georgia Tech Honor Code applies (see last page). Question 1 – Calculating Round-Trip Time (20 points) Between hosts A in Atlanta and B in Las Vegas there are 2 routers (X,Y). The link between routers (---) is 10 Mbps. The access links (LANs, ===) are 1000 Mbps. The distance from A to B is 2000 km. A starts to send a large file using TCP, sending 1500 byte packets to B. B ACKs with 40 byte packets. There is no other traffic on this network. A ===X---Y===B What is the time required to transmit a 1.5 kByte datagram at 10 Mbit/s? ______________ 1.2 _____ ms What is the propagation delay for the round trip in milliseconds (ms): ____________ 20 __________ ms If the router buffers are empty, what is the total round trip transmission delay (neglect processing delay)? ___ 21.2 _ ms What is the average transport rate for a 5 kByte Window size and this RTT? _________ 1.9 Mbps __________ How big a Window size would be needed to reach 10 Mbit/s? __________ 27 kByte _____________ What would happen if the window size was 65 kByte? ___ Limited to 10 Mbps by X-T link speed
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/28/2008 for the course ECE 3076 taught by Professor Copeland during the Spring '08 term at Georgia Institute of Technology.

Page1 / 3

06-2 exam_ans - Name(Print Email Address ECE3076 Final Exam answers RULES i This quiz is not open book Three original sheets of hand-written notes

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online