Koofers

Past Exam for CS 5516 - Computer and Net Arch at Virginia Tech (VT)

Exam Information

Material Type:Mid-Term
Professor:Staff
Class:CS 5516 - Computer and Net Arch
Subject:Computer Science
University:Virginia Polytechnic Institute And State University
Term:Spring 1996
Keywords:
  • Exam Solutions Spring
  • Transmission
  • Either...or
  • Average Number
  • Immediately
  • Multiplexing
  • Provided That
  • Behind (of)
  • Total Length
  • Ip Datagram
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Sample Document Text

EE/CS 5516 - Midterm Exam Solutions - Spring 1996 Page 1 of 3 EE/CS 5516: Computer and Network Architecture II Spring 1996 Midterm Exam Solutions 1. Consider an IP datagram that carries a complete TCP segment from node1 to node2. a) Suppose that the source IP address (node1's address) is 3.54.81.76. What are the network ID and the host ID? Assume that subnets are not used. This is a class A address, so the first byte is the network id and the remaining 3 bytes are the host ID. Network ID = 3 Host ID = 54.81.76 b) The following information is provided by tcpdump about the TCP segment. node1.4200 > node2.5454: P 100:128(28) ack 1300 win 1500 After node2 receives this packet, what is the range of byte sequence numbers that may be sent by node2 to node1? The acknowledgment (ack), 1300, is the next requested byte. The window (win), 1500, gives the number of bytes, so 1300 + 1500 - 1 = 2799 is the highest byte that can be sent. 1300 - 2799 , inclusive c) Using the tcpdump ...

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