An (analog) telephone call is "circuit based," meaning that the system chooses a wire path from sender to receiver and that path or circuit is dedicated to the call until it is complete. What are two disadvantages of circuit switching?

What will be an ideal response?

Once
a
circuit
is
established,
it
is
dedicated
for
the
duration
of
the
call.
Although
the
route
chosen
may
have
been
the
best
at
the
time
the
call
began,
a
set
of
calls
may
usurp
the
limited
resources
between
two
points
over
time.
Finding
an
optimal
circuit
is
a
time-­?consuming
task
at
call
initiation
because
a
full
routing
from
source
to
destination
has
to
be
chosen.