IST 220 Exam 1 Giacobe Exam 2026
Questions and Answers
FDM - Correct answer-Shares communication channel by allowing full-time
access to only part of the communication channel for each circuit
TDM - Correct answer-shares communication channel by allowing the entire
channel to be used by different circuits, one per each time slot
guided media technology - Correct answer-uses wires, fibers, or other similar
mechanisms to send and receive signals
circuit switched networks - Correct answer-maintains the reserved resources for the
entire duration of the communication, whether they are used to the fullest capacity
or not.
packet switched networks - Correct answer-deliver data on a best-effort basis
physical, link, and network - Correct answer-the layers that a router processes
when doing its routing function
link and physical - Correct answer-the layers that a switch processes when doing
its switching function
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, all 5 layers - Correct answer-the layers a host processes
to avoid paying tier 1 isp fees - Correct answer-why do many service providers
(google, netflix) develop their own global networks?
layers may do similar things, but for different reasons to meet different objectives -
Correct answer-what does each layer in a protocol stack do to the layers above and
below
HTTP - Correct answer-the protocol used to deliver web pages
FTP - Correct answer-the protocol used to transfer files between hosts
SMTP - Correct answer-the protocol used to accept electronic mail from users and
transfer them between servers
DNS - Correct answer-the protocol used to translate domain names into IP
addresses
sensitive ; is not - Correct answer-File transfer is _______ to data loss, and
________ time sensitive
reliable transport between the client and the server processes - Correct answer-TCP
is a connection-oriented transport protocol that provides...???
could be a good choice for loss-tolerant video and audio streams. - Correct answer-
UDP provides unreliable data transfer and therefore
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
Questions and Answers
FDM - Correct answer-Shares communication channel by allowing full-time
access to only part of the communication channel for each circuit
TDM - Correct answer-shares communication channel by allowing the entire
channel to be used by different circuits, one per each time slot
guided media technology - Correct answer-uses wires, fibers, or other similar
mechanisms to send and receive signals
circuit switched networks - Correct answer-maintains the reserved resources for the
entire duration of the communication, whether they are used to the fullest capacity
or not.
packet switched networks - Correct answer-deliver data on a best-effort basis
physical, link, and network - Correct answer-the layers that a router processes
when doing its routing function
link and physical - Correct answer-the layers that a switch processes when doing
its switching function
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, all 5 layers - Correct answer-the layers a host processes
to avoid paying tier 1 isp fees - Correct answer-why do many service providers
(google, netflix) develop their own global networks?
layers may do similar things, but for different reasons to meet different objectives -
Correct answer-what does each layer in a protocol stack do to the layers above and
below
HTTP - Correct answer-the protocol used to deliver web pages
FTP - Correct answer-the protocol used to transfer files between hosts
SMTP - Correct answer-the protocol used to accept electronic mail from users and
transfer them between servers
DNS - Correct answer-the protocol used to translate domain names into IP
addresses
sensitive ; is not - Correct answer-File transfer is _______ to data loss, and
________ time sensitive
reliable transport between the client and the server processes - Correct answer-TCP
is a connection-oriented transport protocol that provides...???
could be a good choice for loss-tolerant video and audio streams. - Correct answer-
UDP provides unreliable data transfer and therefore
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
