information Systems Hw

ISE 218: Fundamentals of Information Technology

Stony Brook University

Homework #8

Fall 2017

Assignment Due: December 6, 2017 at the start of lecture

Neatly write or type your answers to the following problems on a separate sheet of paper and submit a hard copy at the start of lecture on the due date. For any problems involving mathematical calculations you must show all work to receive full credit.

Please clearly print or type your full name and Stony Brook ID # on your paper.

Submissions that are not stapled will be docked 5 points.

1. [5 pts] How is a Network Layer protocol different from a Transport Layer protocol?

2. [6 pts] Into which class of networks do the following IP addresses fall? (2 points each)

a. 223.52.176.62

b. 127.255.255.2

c. 191.57.229.163

3. [4 pts] Two stations running TCP/IP are engaged in transferring a file. This file is 10K long, the payload size is 100 bytes, and the negotiated window size is 2000 bytes. The sender receives an ACK 900 from the receiver. (2 points each)

a. Which bytes will be sent next?

b. What is the last byte number that can be sent without an ACK being sent by the receiver?

4. [5 pts] What problems would present themselves if TCP did not allow senders and receivers to negotiate a timeout window?

5. [2 pts] What is the maximum number of hosts that can be defined in a class B network (using IPv4)?

6. [2 pts] What is the maximum number of Class B networks that can be defined (using IPv4)?

ISE 218 – Fall 2017 Page 1 of 1 Homework #8