TDC 375-701                   Student Name:
Quiz 5
2009-10-28


1. How many total packets must be exchanged between two endpoints,
   before a TCP connection can be established and data can begin to
   flow (ignore the case of a simultaneous open)?  Check the best
   answer(s).


   ___ Zero

   ___ One

   ___ Two

   _x_ Three

   ___ Four



2. Specify in bits, the length of each UDP header field:

   16_ source port

   16_ destination port

   16_ length

   16_ checksum



3. Besides various types of streaming multimedia (e.g. VoIP, audio,
   video, radio, tv), what are three popular applications or upper
   layer protocols that commonly use UDP as its transport protocol?

   Numerous answers possible.  Examples include: SNMP, TFTP, DNS,
   syslog, NTP, DHCP, Netflow and RIP.




4. Name two fields that you'll always find in a TCP header that are
   not in a UDP header.

   Various answers possible.  Examples include: sequence number,
   acknowledgement number, data offset, reserved bits, control
   flags (urg, ack, psh, rst, syn, fin), window and urgent pointer.



5. In a TCP connection, the value of the sender's congestion window
   (cwnd) is 3000 bytes and the receiver is advertising a receive
   window (rwin) of 5000 bytes.  The sender has recently sent 1000
   bytes that have not been acknowledged.  What is the value of the
   transmission/usable window of the sender?

   transmission window = min(3000,5000) - 1000 bytes sent and
   unacknowledged = 2000 bytes


$Id: quiz5.txt,v 1.2 2009/10/29 03:42:31 jtk Exp $