EBK COMPUTER NETWORKING
7th Edition
ISBN: 8220102955479
Author: Ross
Publisher: PEARSON
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Question
Chapter 9, Problem P15P
a)
Program Plan Intro
UDP:
UDP stands for User Data Protocol which is a communication protocol used for establishing low latency and loss tolerating connections between various applications on internet.
b)
Program Plan Intro
RTP (Real Time Protocol):
- It is a protocol that is used to provide end-to-end network transportation function for application to transmit the real time data.
- The real time data could be transmitting audio or video, simulated data or network services (unicast or multicast).
SIP (Session Initiation Protocol):
- It is a lightweight protocol which is used to establishing calls between the caller and the callee over an IP network.
- It is used to determine the current IP address of the callee to its caller.
- It is used in managing the call.
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Students have asked these similar questions
a. Suppose we send into the Internet two IP datagrams, each carrying a different UDP
segment. The first datagram has source IP address A1, destination IP address B, source
port P1, and destination port T. The second datagram has source IP address A2,
destination IP address B, source port P2, and destination port T. Suppose that A1 is
different from A2 and that P1 is different from P2. Assuming that both datagrams reach
their final destination, will the two UDP datagrams be received by the same socket? Why
or why not?
b. Suppose Alice, Bob, and Claire want to have an audio conference call using SIP and
RTP. For Alice to send and receive RTP packets to and from Bob and Claire, is only one
UDP socket sufficient (in addition to the socket needed for the SIP messages)? If yes,
then how does Alice's SIP client distinguish between the RTP packets received from Bob
and Claire?
Host A and B are communicating over a TCP connection, and Host B has already received from A all bytes up through byte 126. Suppose Host A then sends two segments to Host B backto-back. The first and second segments contain 80 and 40 bytes of data, respectively. In the first segment, the sequence number is 127, the source port number is 302, and the destination port number is 80. Host B sends an acknowledgment whenever it receives a segment from Host A.
d. Suppose the two segments sent by A arrive in order at B. The first acknowledgment is lost and the second acknowledgment arrives after the first timeout interval. Draw a timing diagram, showing these segments and all other segments and acknowledgments sent. (Assume there is no additional packet loss.) For each segment in your figure, provide the sequence number and the number of bytes of data; for each acknowledgment that you add, provide the acknowledgment number.
Host A and B are communicating over a TCP connection, and Host B has
already received all bytes up through byte 100 (including Byte 100) from A. Suppose
Host A then sends two packets to Host B back-to-back. The first and second packets
contain 40 and 80 bytes of data, respectively. Host B sends an acknowledgment
whenever it receives a packet from Host A.
a. What is the sequence number of the first packet sent from Host A to Host B? What is
the sequence number of the second packet sent from Host A to Host B?
b. If the second packet arrives before the first packet, in the acknowledgment of the
first arriving packet, what is the acknowledgment number? .
Chapter 9 Solutions
EBK COMPUTER NETWORKING
Ch. 9 - Prob. R1RQCh. 9 - Prob. R2RQCh. 9 - Prob. R3RQCh. 9 - Prob. R4RQCh. 9 - Prob. R5RQCh. 9 - Prob. R6RQCh. 9 - Prob. R7RQCh. 9 - Prob. R8RQCh. 9 - Prob. R9RQCh. 9 - Prob. R10RQ
Ch. 9 - Prob. R11RQCh. 9 - Prob. R12RQCh. 9 - Prob. R13RQCh. 9 - Prob. P1PCh. 9 - Prob. P2PCh. 9 - Prob. P3PCh. 9 - Prob. P4PCh. 9 - Prob. P5PCh. 9 - Prob. P6PCh. 9 - Prob. P7PCh. 9 - Prob. P8PCh. 9 - Prob. P9PCh. 9 - Prob. P10PCh. 9 - Prob. P11PCh. 9 - Prob. P12PCh. 9 - Prob. P13PCh. 9 - Prob. P14PCh. 9 - Prob. P15PCh. 9 - Prob. P16PCh. 9 - Prob. P17PCh. 9 - Prob. P18PCh. 9 - Prob. P19PCh. 9 - Prob. P20PCh. 9 - Prob. P21PCh. 9 - Prob. P22P
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