In Tcp/ip suite ,session and presentation layers are are
eliminated as comapred to OSI model

While MTP L3 can only identify and distribute messages to specific points and user parts, SCCP can route messages to specific applications that reside at signaling points.

Message Transfer Part level 3 (MTP3) is the network layer in
the SS7 protocol stack. It routes SS7 signalling messages to
public network nodes by means of Destination Point Codes,
and to the appropriate signalling entity within a node by
means of a Service Info Octet. MTP3 is specified as part of
the SS7 protocol and is also referred to as part of the
B-ICI interface for ATM. MTP3 sits between MTP2 and the user
parts (ISUP, TUP, SCCP and TCAP) of the SS7 protocol stack.
B-ISUP is an Application Layer protocol run over MTP3.

it is a message identifier and distributor.MTP L3 is responsible for identifying a signaling message's type, and then distributing it up the stack to the correct user part.Another responsibility of MTP L3 at an STP is to route an inbound message back out on the proper link to the proper point on the network.MTP L3 is also the network manager. It performs functions that provide rules and procedures for opening and maintaining links, and also for placing them back into service after a link or point failure.

the links in SS7 network are A,B,C,D,E,F which are used for linking ssp,stp and scps.

Application layer: It is the layer 7th of OSI model. Its 
provide user interface that user used to interact with 
software application (IE, Opera).

Apart from this, the other key functions performed by 
application layer is - 
a) Identify & Establish Communication.
b) Determine Resource Availability.
c) Synchronize Communication.

Suppose u want to access www. yahoo.com. To accomplish this 
task, u write www.yahoo.com on address bar. Now Internet 
Explorer with the help of protocol give u the necessary 
interface to access Yahoo web page.

U can take another example, Windows Media player. We can 
play music thro Win Media player. At this time, application 
layer privide necessary interface to play a song thro media 
player. 


a) Identify & Establish Communication - Application 
identify & determine the communication partner with whom 
its goin to transfer data.

When u press enter after write www.yahoo.com, the 
application layer determine wheater its a valid URL or not. 
If yes, its establish a communication with server where 
this page reside. 

b)Determine Resource Availability: Application must 
determine wheather the sufficient network resources are 
available or not for the requested communication.

Application layer determine wheather the yahoo web page is 
present on the world wide web or not. Application layer 
make sure it.

c) Synchronize Communication: Communication between 
application need certain help which is provided by 
application layer.

Communication between ur system n web server need certain 
help, which is provided by application layer.



If somebody explain more in depth, i'll be thankful to 
him/her. thanks in advance...

Hey very simple u have to installed missing plugins and one
more thing upgrade your media player,I hope this will solve
your problem.I suggest to use Mozilla Firefox.

Regards

install flash player manually.