IST 220 EXAM 1 GIACOBE EXAM
2025/2026 QUESTIONS AND ANSWERS
100% PASS
FDM - ANS Shares communication channel by allowing full-time access to only part of the
communication channel for each circuit
TDM - ANS shares communication channel by allowing the entire channel to be used by
different circuits, one per each time slot
guided media technology - ANS uses wires, fibers, or other similar mechanisms to send and
receive signals
circuit switched networks - ANS maintains the reserved resources for the entire duration of
the communication, whether they are used to the fullest capacity or not.
packet switched networks - ANS deliver data on a best-effort basis
pg. 1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, physical, link, and network - ANS the layers that a router processes when doing its routing
function
link and physical - ANS the layers that a switch processes when doing its switching function
all 5 layers - ANS the layers a host processes
to avoid paying tier 1 isp fees - ANS 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 -
ANS what does each layer in a protocol stack do to the layers above and below
HTTP - ANS the protocol used to deliver web pages
FTP - ANS the protocol used to transfer files between hosts
pg. 2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
2025/2026 QUESTIONS AND ANSWERS
100% PASS
FDM - ANS Shares communication channel by allowing full-time access to only part of the
communication channel for each circuit
TDM - ANS shares communication channel by allowing the entire channel to be used by
different circuits, one per each time slot
guided media technology - ANS uses wires, fibers, or other similar mechanisms to send and
receive signals
circuit switched networks - ANS maintains the reserved resources for the entire duration of
the communication, whether they are used to the fullest capacity or not.
packet switched networks - ANS deliver data on a best-effort basis
pg. 1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, physical, link, and network - ANS the layers that a router processes when doing its routing
function
link and physical - ANS the layers that a switch processes when doing its switching function
all 5 layers - ANS the layers a host processes
to avoid paying tier 1 isp fees - ANS 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 -
ANS what does each layer in a protocol stack do to the layers above and below
HTTP - ANS the protocol used to deliver web pages
FTP - ANS the protocol used to transfer files between hosts
pg. 2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
