THIS IS A PRESENTATION FOR NETWORK TOPOLOGY......

1. NETWORK TOPOLOGY

2. TTOOPPOOLLOOGGYY
• Topology defines the physical or logical
arrangement of links in a network.
• Two or more devices connect to a link
then these two or more links make a
topology.
• The topology of a network is the
geometric representation of the
relationship of the relationship of all the
links and linking devices to each other.

3. TTYYPPEESS OOFF TTOOPPOOLLOOGGYY
 PPHHYYSSIICCAALL TTOOPPOOLLOOGGYY ::PPhhyyssiiccaall
ttooppoollooggyy iiss tthhee ppllaacceemmeenntt ooff tthhee
vvaarriioouuss ccoommppoonneennttss ooff aa nneettwwoorrkk,,
iinncclluuddiinngg ddeevviiccee llooccaattiioonn aanndd ccaabbllee
iinnssttaallllaattiioonn..
 LLOOGGIICCAALL TTOOPPOOLLGGYY ::LLooggiiccaall ttooppoollooggyy
iilllluussttrraatteess hhooww ddaattaa fflloowwss wwiitthhiinn aa
nneettwwoorrkk,, rreeggaarrddlleessss ooff iittss pphhyyssiiccaall
ddeessiiggnn..

4. TTYYPPEESS OOFF NNEETTWWOORRKK TTOOPPOOLLOOGGYY
 TThheerree aarree bbaassiiccaallllyy ffiivvee ttyyppeess ooff
nneettwwoorrkk ttooppoollooggiieess::--
 BBUUSS TTOOPPOOLLOOGGYY
 RRIINNGG TTOOPPOOLLOOGGYY
 SSTTAARR TTOOPPOOLLOOGGYY
 TTRREEEE TTOOPPOOLLOOGGYY
 MMEESSHH TTOOPPOOLLOOGGYY

5. MMEESSHH TTOOPPOOLLOOGGYY
• Mesh topologies involve the concept of routes.
• Unlike each of the previous topologies,
messages sent on a mesh network can take any
of several possible paths from source to
destination.
• Some WANs, most notably the Internet, employ
mesh routing.
• A mesh network in which every device connects
to every other is called a full mesh.

6. MMEESSHH TTOOPPOOLLOOGGYY
• This is also known as connected network.
• Every node in LAN is connected to all other
nodes , through a direct cable.
• A fully connected mesh network therefor has
n(n-1)/2 physical channels to link n devices.
• Every devices on the network must have (n-1)
input/output ports to accommodate that many
links.

7. MMEESSHH TTOOPPOOLLOOGGYY

8. AADDVVAANNTTAAGGEESS
• It has the highest speed of communication
and highest reliability.
• Point to point links make fault identification
and fault isolation easy.
• A mesh topology is robust.If one link become
unuseable,it does not incapaciate the entire
system.
• A mesh topology has privacy or security.

9. DDIISSAADDVVAANNTTAAGGEE
• Main disadvantage of a mesh are related to
the amount of cabling and the numberof I/O
ports needed.
• Since each devices must be connected to
every other device , installation and
reconfiguration are difficult.
• Due to these reasons this topology has the
highest cabling cost.

10. BBUUSS TTOOPPOOLLOOGGYY
 IItt iiss aa ssiimmpplleesstt ttyyppee ooff nneettwwoorrkk wwiitthh tthhee
lloowweesstt ccoosstt..
 IInn bbuuss ttooppoollooggyy nnooddeess aarree ccoonnnneecctteedd ttoo
tthhee bbuuss ccaabbllee bbyy ddrroopp lliinneess aanndd ttaappss ..
 AAss ssiiggnnaall ttrraavveellss aalloonngg tthhee bbaacckkbboonnee ssoommee
ooff iittss eenneerrggyy iiss ttrraannssffoorrmm iinnttoo hheeaatt..
 SSoo iittss bbeeccoommee wweeaakkeerr aanndd wweeaakkeeaarr tthhuuss
tthheerree iiss aa lliimmiitt oonn tthhee nnoo ooff ttaappss,,aa bbuuss ccaann
ssuuppppoorrtt..

11. BUS TOPOLOGY

12.  ADVANTAGE
• Easy in installation.
• Uses less cables than mesh , star and other.
 DISADVANTAGE
• Difficulty in reconfiguration fault or break in
bus cable stops all transmission

13. RRIINNGG TTOOPPOOLLOOGGYY
 IInn tthhiiss ttooppoollooggyy tthhee ccoommppuutteerrss aarree
ccoonnnneecctteedd bbyy aass ssiinnggllee ccaabbllee iinn aa cciirrccuullaarr
mmaannnneerr,,wwiitthh eeaacchh ccoommppuutteerr ccoonnnneecctteedd
ddiirreeccttllyy oonnllyy ttoo iittss ttoo nneeiigghhbboouurrss..
 IIff aa ssttaattiioonn wwaannttss ttoo sseenndd ttoo aannootthheerr tthhee
mmeessssaaggee jjuusstt ppaasstt tthhrroouugghh aallll tthhee ssttaattiioonnss
iinn bbeettwweeeenn ((eeiitthheerr cclloocckkwwiissee oorr
aannttiicclloocckkwwiissee))..

14. RRIINNGG TTOOPPOOLLOOGGYY
 TThhee ttwwoo eennddss ooff ccaabblleess aarree jjooiinntt
ttooggeetthheerr..
 IInn tthhiiss ttooppoollooggyy ccooaaxxiiaall ccaabblleess aarree
uusseedd ..

15. RRIINNGG TTOOPPOOLLOOGGYY

16. ADVANTAGE
• Easy to install and reconfigure fault isolation
is simplified
DISADVANTAGE
 A in a ring can disable the entire network.

17. SSTTAARR TTOOPPOOLLOOGGYY
 IInn tthhiiss ttooppoollooggyy tthhee ccoommppuutteerr aarree
ccoonnnneecctteedd iinn ssttaarr mmaannnneerr..
 TThhee sseerrvveerr iiss ppllaacceedd aatt tthhee cceenntteerr ooff
ssttaarr..
 IInn tthhiiss ttooppoollooggyy tthhee ccoommppuutteerr aarree
nnoott ddiirreeccttllyy lliinnkkeedd ttoo eeaacchh ootthheerr..

18. SSTTAARR TTOOPPOOLLOOGGYY
 TThhee sseerrvveerr ((cceennttrree ccoonnttrroolllleerr)) ccoonnttrroollss aallll
ccoommmmuunniiccaattiioonnss bbeettwweeeenn ssttaattiioonnss ttoo tthhee
nneettwwoorrkk..
 FFaaiilluurree ooff tthhee cceennttrraall ccoonnttrroolllleerr wwiillll ddiissaabbllee
aallll ccoommmmuunniiccaattiioonn tthhrroouugghhoouutt tthhee wwhhoollee
nneettwwoorrkk ..
 IIff oonneess ddeevviiccee wwaannttss ttoo sseenndd ddaattaa ttoo
aannootthheerr,, iitt sseennddss tthhee ddaattaa ttoo tthhee ccoonnttrroolllleerr
aanndd tthheenn rreellaayy tthhee ddaattaa ttoo ootthheerr ccoonnnneecctteedd
ddeevviiccee..

19. SSTTAARR TTOOPPOOLLOOGGYY

20. ADVANTAGE
• Less expansive
• Easy to install
• Robustness
• Fault identification
• Less cabling
DISADVANTAGE
• If central controller(HUB) fails,entire
network goes down.

21. TTRREEEE TTOOPPOOLLOOGGYY
• A tree topology is a variation of a star.
• As in star , nodes is a tree ree are linked
to a central hub that controls the traffic
to the network.
• In tree every , every computer is not
plugged in to the central hub most of
them are connected to the secondary
hub.

22. TTRREEEE TTOOPPOOLLGGYY
• In this topology , the concept of child and
parent is applied during communication
process.
• A child node node can pass information to
another child node at the same level through
the parent.
• The failure of parent node disables the
communication.

23. TTRREEEE TTOOPPOOLLOOGGYY

24. AADDVVAANNTTAAGGEESS
• It is more robust in terms of security of
information in comparision to star,bus or ring
topologies.
• It is having the the best security.
• Allow more devices to be attached to a central
hub and therefor increases the distance a signal
can travel between devices.
• The good example of tree topolgy can be seen
in cable tv technology where the main cable
from the main office is divided into main
branches and each branch is divided into
smaller branches and soon.

25. SSUUMMMMAARRYY
Topologies remain an important part of
network design theory. You can probably
build a home or small business computer
network without understanding the
difference between a bus design and a
star design, but becoming familiar
with the standard topologies gives you a
better understanding of important
networking concepts like hubs,
broadcasts, and routes.

26. CCRREEAATTEEDD BBYY
SOM KRISHna