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mid03-2 - CDA 45000-10542 Introduction to Data...

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1 CDA 45000-10542: Introduction to Data Communications Fall 2003 Name: ____________________________________ Midterm 2 Last 5 digits of SSN : xxx-x ___–___ ___ ___ ___ This is a CLOSED books/notes test. You are NOT allowed to consult any material you have brought into the classroom. NO exchange of information is allowed among students. If you find any question vague or ambiguous, make an educated assumption, write your assumption down, and solve the question under that assumption. Write your name and SS# on each sheet detached. 1. What will be the following bit pattern look like after bit-stuffing , as discussed in class, has been done? (15 pts.) 0 1 1 1 1 1 0 1 0 1 1 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 0 1 2. Consider the following scenario in the GO-back-N ARQ: (10 pts.) Station A Station B What action will Station A take in response to: a) missing ACK 2? b) NAK 4? . . . P0 received P1 received sending ACK 2 P2 received P3 received sending ACK 4 P4 received sending NAK 4 P5 received P6 received P7 received . . .
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  • Fall '10
  • STAFF
  • Network Protocols, Error detection and correction, Point-to-Point Protocol, Selective Repeat ARQ, Go-Back-N ARQ

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