Chapter 3 - Computer Networking: A Top-Down Approach Questions with Detailed Verified Answers (100% Correct Answers) /Already Graded A+

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Chapter 3 - Computer Networking: A Top-Down
Approach Questions with Detailed Verified Answers
(100% Correct Answers) /Already Graded A+
Quiz: transport protocols run in ___

Ans: end systems




Quiz: app messages are broken into ____ by the send side, and

passed to the network layer

Ans: segment(s)




Quiz: the receiving side ____ segments and passes them to the app

layer

Ans: reassembles (into messages)




Quiz: term for network/IP packets

Ans: datagram




Quiz: logical communication between hosts

Ans: network layer




Quiz: logical communication between processes

Ans: transport layer


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,Quiz: the *transport layer* relies on and enhances _____ services

Ans: network layer




Quiz: handle data from multiple sockets, add transport header

Ans: multiplexing at sender




Quiz: use header info to deliver to deliver received segments to the

correct socket

Ans: demultiplexing at receiver




Quiz: in *demultiplexing*, each datagram received by the host has

_____ and ____

Ans: source IP (address), destination IP (address)




Quiz: in *demultiplexing*, each datagram carries a(n) ____

Ans: transport-layer segment




Quiz: in *demultiplexing*, the host uses ______ to direct a segment to

the appropriate socket

Ans: IP address(es), port numbers




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, Quiz: *(connectionless demultiplexing)* when the host receives a UDP

segment, it checks the ____ in the segment and directs the segment to

the _____ with that _____

Ans: destination port (#), socket, port (#)




Quiz: *(connectionless demultiplexing)* when creating a datagram

to send into a UDP socket, must specify _____ and ____

Ans: destination IP (address), destination port (#)




Quiz: *(connectionless demultiplexing)* IP datagrams with the _____

but different source IP address and/or source port numbers will be

directed to the ____

Ans: same destination port (#), same socket as destination




Quiz: interface between network layer and transport layer

Ans: socket




Quiz: why do we need the *source port* in connectionless demux?

Ans: used as return address




Quiz: *(connectionless demux)*




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