EE555-USC-Spring08-Silvester-HW1

EE555-USC-Spring08-Silvester-HW1 - EE555 Broadband Network...

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

View Full Document Right Arrow Icon
EE555 – Broadband Network Architectures (Spring 2009) Homework 1: Networking Basics and Modelling Due: Tuesday January 27, 2009 Question 1. Describe the difference between datagram and virtual circuit packet switching. How is virtual circuit packet switching commonly implemented in a wide area network? Question 2. A file of length 10 Mbit is to be transmitted over a 6 (router) hop network. The (maximum) packet length is 11,000 bit (including the 1000 bit header). Each hop has a propagation delay of 3ms, processing delay (per packet) at each node is 0.1ms, there is no interfering traffic, link capacity is 1M bps. There is no circuit setup. What is the minimum time required to transmit the file? Question 3. a) What is the link utilization for the Stop-and-Wait flow control protocol (assuming no errors)? Packet length L bits, acknowledgement packets are carried in full length packets, channel capacity C bits/per second in each direction, propagation delay t (each direction), negligible packet processing time? b) The same protocol is also used for error control. If the packet error rate is p (in the forward and return channel), what is the link utilization? Question 4. What Ethernet standards (802.3) are relevant to communication over single mode fiber? What is the highest data rate Ethernet standard (IEEE) currently available for communication in a Wide Area Network? What higher speed(s) standards are under discussion and when might they become available?
Image of page 1

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

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

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern