logo
call

Chat with support 24/7

1-239-690-6577

Professional Custom Essay Writing Service

Order from the best essay help service in the whole world!

...content here............

Computer Science Assignment – expert computer networks

Document Preview:

1102/159.334 CP ALB Internal -Page 1 of 7 -MASSEY UNIVERSITY ALBANY CAMPUS EXAMINATION FOR 159.334 Computer Networks Semester Two -2011 Time allowed: THREE (3) hours Attempt ALL 6 (six) questions. All questions are of equal value. This examination contributes 60% to the final assessment. Calculators permitted – no restrictions. 1102/159.334 CP ALB Internal -Page 2 of 7 -Question 1: a) Name four socket functions (C functions) used to create client/server applications. [4 marks] b) Name the five layers in a typical TCP/IP computer network. [2 marks] c) What are the services provided by TCP? [2 marks] d) The source and destination port numbers are included in the packet header. Which layer needs to be able to read these port numbers? [2 marks] 1102/159.334 CP ALB Internal -Page 3 of 7 -Question 2: (The Application Layer) a) If an FTP client is in active mode, what are the two FTP commands (protocol commands) issued by the client when the user issues: ftp> ls [2 marks] b) If an FTP client is in passive mode, what are the two FTP commands (protocol commands) issued by the client when the user issues: ftp> get [2 marks] c) The command netstat is used by a system administrator. Explain the difference between LISTEN and ESTABLISHED states. Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 localhost:1234 *:* LISTEN tcp 0 0 localhost:43000 it046500:20 ESTABLISHED [2 marks] d) How many simultaneous connections does HTTP needs in order to download a single file? How many simultaneous connections does FTP needs in order to download a single file? [2 marks] e) Briefly explain what is a DNS (Domain Name Service) iterated query. Explain why this method is important to keep the scalability of the DNS. [2 marks] 1102/159.334 CP ALB Internal -Page 4 of 7 -Question 3: (The Transport Layer) a) A distributed system uses UDP to transfer files between nodes. You are asked to design a simple reliable protocol to replace it. What are the essential elements that you need to…

Need a Professional Writer to Work on Your Paper and Give you Original Paper? CLICK HERE TO GET THIS PAPER WRITTEN

Place a custom essay order similar to this or any related topic. NB: The assignment paper will be written from scratch as per your instructions and it will be 100% original. It will pass all plagiarism check.

endwhile; ?>

Check Our Prices

Free Quote

 

TRACK YOUR ORDER

All kinds of papers in all subject areas

We can successfully deal with all kinds of school assignments corresponding to various academic disciplines. Among these school papers are:

  • Custom essays
  • Dissertations and theses (undergraduate, Master's, PhD)
  • Research and term papers
  • Courseworks and case studies
  • Admission essays and personal statements, etc.
University of Nairobi