<s>
Sequenced	B-Protocol
Packet	I-Protocol
Exchange	I-Protocol
(	O
SPX	O
)	O
is	O
a	O
protocol	O
in	O
the	O
IPX/SPX	B-Protocol
protocol	B-Protocol
stack	I-Protocol
that	O
corresponds	O
to	O
a	O
connection-oriented	B-Protocol
transport	B-Architecture
layer	I-Architecture
protocol	O
in	O
the	O
OSI	O
model	O
.	O
</s>
<s>
Being	O
reliable	O
and	O
connection-oriented	B-Protocol
,	O
it	O
is	O
analogous	O
to	O
the	O
Transmission	B-Protocol
Control	I-Protocol
Protocol	I-Protocol
(	O
TCP	O
)	O
of	O
TCP/IP	B-Protocol
,	O
but	O
it	O
is	O
a	O
datagram	O
protocol	O
,	O
rather	O
than	O
a	O
stream	O
protocol	O
.	O
</s>
