<s>
An	O
ad	B-Protocol
hoc	I-Protocol
routing	I-Protocol
protocol	I-Protocol
is	O
a	O
convention	O
,	O
or	O
standard	O
,	O
that	O
controls	O
how	O
nodes	B-Protocol
decide	O
which	O
way	O
to	O
route	B-Protocol
packets	B-Protocol
between	O
computing	O
devices	O
in	O
a	O
mobile	B-Protocol
ad	I-Protocol
hoc	I-Protocol
network	I-Protocol
.	O
</s>
<s>
In	O
ad	O
hoc	O
networks	O
,	O
nodes	B-Protocol
are	O
not	O
familiar	O
with	O
the	O
topology	B-Architecture
of	O
their	O
networks	O
.	O
</s>
<s>
The	O
following	O
is	O
a	O
list	O
of	O
some	O
ad	O
hoc	O
network	B-Protocol
routing	I-Protocol
protocols	O
.	O
</s>
<s>
This	O
type	O
of	O
protocols	O
maintains	O
fresh	O
lists	O
of	O
destinations	O
and	O
their	O
routes	O
by	O
periodically	O
distributing	O
routing	B-Protocol
tables	O
throughout	O
the	O
network	O
.	O
</s>
<s>
Optimized	B-Protocol
Link	I-Protocol
State	I-Protocol
Routing	I-Protocol
Protocol	I-Protocol
(	O
OLSR	B-Protocol
)	O
RFC	O
3626	O
,	O
RFC	O
7181	O
.	O
</s>
<s>
B.A.T.M.A.N.	B-Protocol
</s>
<s>
This	O
type	O
of	O
protocol	O
finds	O
a	O
route	B-Protocol
on	O
demand	O
by	O
flooding	O
the	O
network	O
with	O
Route	B-Protocol
Request	O
packets	B-Protocol
.	O
</s>
<s>
High	O
latency	O
time	O
in	O
route	B-Protocol
finding	O
.	O
</s>
<s>
This	O
type	O
of	O
protocol	O
combines	O
the	O
advantages	O
of	O
proactive	O
and	O
reactive	O
routing	B-Protocol
.	O
</s>
<s>
The	O
routing	B-Protocol
is	O
initially	O
established	O
with	O
some	O
proactively	O
prospected	O
routes	O
and	O
then	O
serves	O
the	O
demand	O
from	O
additionally	O
activated	O
nodes	B-Protocol
through	O
reactive	O
flooding	O
.	O
</s>
<s>
Advantage	O
depends	O
on	O
number	O
of	O
other	O
nodes	B-Protocol
activated	O
.	O
</s>
<s>
ZRP	B-Protocol
(	O
Zone	B-Protocol
Routing	I-Protocol
Protocol	I-Protocol
)	O
ZRP	B-Protocol
uses	O
IARP	O
as	O
pro-active	O
and	O
IERP	O
as	O
reactive	O
component	O
.	O
</s>
<s>
With	O
this	O
type	O
of	O
protocol	O
the	O
choice	O
of	O
proactive	O
and	O
of	O
reactive	O
routing	B-Protocol
depends	O
on	O
the	O
hierarchic	O
level	O
in	O
which	O
a	O
node	O
resides	O
.	O
</s>
<s>
The	O
routing	B-Protocol
is	O
initially	O
established	O
with	O
some	O
proactively	O
prospected	O
routes	O
and	O
then	O
serves	O
the	O
demand	O
from	O
additionally	O
activated	O
nodes	B-Protocol
through	O
reactive	O
flooding	O
on	O
the	O
lower	O
levels	O
.	O
</s>
<s>
Examples	O
of	O
hierarchical	O
routing	B-Protocol
algorithms	I-Protocol
are	O
:	O
</s>
<s>
Order	B-Protocol
One	I-Protocol
Network	I-Protocol
Protocol	I-Protocol
;	O
Fast	O
logarithm-of-2	O
maximum	O
times	O
to	O
contact	O
nodes	B-Protocol
.	O
</s>
