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22-Elec-B4 Information Technology Networks: May 2013

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 The Internet Protocol, versions 4 and 6
  2. Question 2 Transport layer protocols
  3. Question 3 Shortest-path routing by Dijkstra’s algorithm
  4. Question 4 Layered architecture and the OSI model
  5. Question 5 Medium access control protocols
  6. Question 6 The data link layer and peer-to-peer protocols

Start with Question 1 →

Paper format. Professional Engineers of Ontario annual examination, 07-Elec-B4 Information Technology Networks, May 2013. Three hours, closed book, one PEO-approved non-programmable calculator. Marks are shown in the left margin of the original paper; the cover page states that four questions constitute a complete paper worth 100 marks. Every question and every sub-part is answered below, because the set is intended as a study resource rather than as a sat examination.

Check: question count. The cover page of the paper says “There are 5 questions on this exam. Any 4 questions constitute a complete paper”, yet six numbered questions are printed (Questions 1 to 5 at 25 marks each on pages 2 to 4, and Question 6 at 20 marks on page 5), for 145 marks in total. Four 25-mark questions do give exactly the stated 100 marks, so the cover note is consistent with the five 25-mark questions and Question 6 appears to be a carry-over that the cover page was never updated for. All six are solved here.

Reference texts. A. Leon-Garcia and I. Widjaja, Communication Networks: Fundamental Concepts and Key Architectures, 2nd ed. — the reference listed by the EGBC/Engineers Canada syllabus for this examination code; J. F. Kurose and K. W. Ross, Computer Networking: A Top-Down Approach, 8th ed.; A. S. Tanenbaum and D. J. Wetherall, Computer Networks, 5th ed.; W. Stallings, Data and Computer Communications, 10th ed. Normative documents cited: RFC 791 and RFC 8200 (IPv4 and IPv6), RFC 1918 and RFC 4193 (private address space), RFC 5681 (TCP congestion control), IEEE 802.3 (CSMA/CD) and IEEE 802.11 (RTS/CTS).