<s>
thumb|Unicast	O
is	O
data	O
transmission	O
from	O
a	O
single	O
sender	O
(	O
red	O
)	O
to	O
a	O
single	O
receiver	O
(	O
green	O
)	O
.	O
</s>
<s>
In	O
computer	B-Architecture
networking	I-Architecture
,	O
unicast	B-Protocol
is	O
a	O
one-to-one	B-Architecture
transmission	I-Architecture
from	O
one	O
point	O
in	O
the	O
network	O
to	O
another	O
point	O
;	O
that	O
is	O
,	O
one	O
sender	O
and	O
one	O
receiver	O
,	O
each	O
identified	O
by	O
a	O
network	B-Protocol
address	I-Protocol
.	O
</s>
<s>
Unicast	B-Protocol
is	O
in	O
contrast	O
to	O
multicast	O
and	O
broadcast	B-Operating_System
which	O
are	O
one-to-many	O
transmissions	O
.	O
</s>
<s>
Internet	B-Protocol
Protocol	I-Protocol
unicast	B-Protocol
delivery	O
methods	O
such	O
as	O
Transmission	B-Protocol
Control	I-Protocol
Protocol	I-Protocol
(	O
TCP	O
)	O
and	O
User	B-Protocol
Datagram	I-Protocol
Protocol	I-Protocol
(	O
UDP	O
)	O
are	O
typically	O
used	O
.	O
</s>
