Chapter 3 - Computer Networking: A TopDown Approach UPDATED ACTUAL Exam Questions and CORRECT Answers

Chapter 3 - Computer Networking: A Top-
Down Approach UPDATED ACTUAL
Exam Questions and CORRECT Answers
end systems - CORRECT ANSWER - transport protocols run in ___



segment(s) - CORRECT ANSWER - app messages are broken into ____ by the send side,
and passed to the network layer


reassembles (into messages) - CORRECT ANSWER - the receiving side ____ segments
and passes them to the app layer


datagram - CORRECT ANSWER - term for network/IP packets



network layer - CORRECT ANSWER - logical communication between hosts



transport layer - CORRECT ANSWER - logical communication between processes



network layer - CORRECT ANSWER - the *transport layer* relies on and enhances _____
services


multiplexing at sender - CORRECT ANSWER - handle data from multiple sockets, add
transport header


demultiplexing at receiver - CORRECT ANSWER - use header info to deliver to deliver
received segments to the correct socket


source IP (address), destination IP (address) - CORRECT ANSWER - in
*demultiplexing*, each datagram received by the host has _____ and ____

, transport-layer segment - CORRECT ANSWER - in *demultiplexing*, each datagram
carries a(n) ____


IP address(es), port numbers - CORRECT ANSWER - in *demultiplexing*, the host uses
______ to direct a segment to the appropriate socket


destination port (#), socket, port (#) - CORRECT ANSWER - *(connectionless
demultiplexing)* when the host receives a UDP segment, it checks the ____ in the segment and
directs the segment to the _____ with that _____


destination IP (address), destination port (#) - CORRECT ANSWER - *(connectionless
demultiplexing)* when creating a datagram to send into a UDP socket, must specify _____ and
____


same destination port (#), same socket as destination - CORRECT ANSWER -
*(connectionless demultiplexing)* IP datagrams with the _____ but different source IP address
and/or source port numbers will be directed to the ____


socket - CORRECT ANSWER - interface between network layer and transport layer



used as return address - CORRECT ANSWER - why do we need the *source port* in
connectionless demux?


UDP socket tuple - CORRECT ANSWER - *(connectionless demux)*


<destination IP, destination port>


TCP socket tuple - CORRECT ANSWER - *(connection-oriented demux)*