Computer networks play an important role today, but it is essential to check if computers are ready for data transfer by determining if they are connected to the network. Network monitoring collects information from various parts of the network to manage and control it. It has three main goals: performance monitoring, fault monitoring, and account monitoring. Tools like ping and trace route are used to check connectivity and network performance.

2. Introduction
 Computer Networks play an increasingly
important role in today’s technological
age
 But before the transfer of any
information between the computers it is
essential to know if this transfer can
actually take place
 For this, it is important to check if the
computers ready for data transfer are up
in the network or not

3. Network connection
diagram

4. Fundamentals of Network
Monitoring
 The purpose of network monitoring is the
collecting of useful information from various
parts of the network so that the network can
be managed and controlled using the collected
information
 Network monitoring techniques are developed
to allow network management applications to
check the states of their network devices
 As more and more network devices are used
to build bigger networks, network monitoring
techniques are expanded to monitoring
networks as a whole

5. Three basic goals of network
monitoring:
 Performance monitoring
 Fault monitoring
 Account monitoring

6. A list of network indicators
 Circuit Availability: The actual time that a
user can dial up to a network and the
network connection is available for the user
 Node Availability: The actual time that a
user can use network nodes, multiplexers
and routers without having error
 Blocking Factor: The number of user
who cannot access the network because of
busy signal in theory
 Response Time: The time to transmit a
signal and receive a response for the
signal

7. Ideal network monitoring
system
 Integration
 Productivity
 Efficiency

8. Sources of data
 Measurement of metrics
 This refers to the method of obtaining
network data by measuring certain metrics
regarding Network performance
 An example might be the measurement of
packet round trip times and packet loss

10. Basic terminology
 LAN: Ex – inside school, office building
 MAN: Ex - telephone lines
 WAN: Ex – within a town or city
 Network switch
 Router
 Port number
 IP address

11. Network monitoring tools
 Ping

12. Network monitoring tools
 Trace Route

13. Network monitoring tools
 Switch port mapper

15. Introduction to ping
 What is PING?
 How does ping helps?
 Why should we use ping?

16. Using the ping command
 Syntax: xxx: xxx: xxx: xxx
 To check connectivity by using the ping
command, at the command prompt, type
ping and the IP address you want to
reach

17. Example of ping
 The following example illustrates how to send
two pings, each 1,450 bytes in size, to IP
address 10.3.1.131:
 C:>ping 10.3.1.131 -t
Pinging 10.3.1.131 with 1450 bytes of data:
Reply from 10.3.1.131: bytes=1450 time<10ms TTL=32
Reply from 10.3.1.131: bytes=1450 time<10ms TTL=32
Ping statistics for 10.3.1.131:
Packets: Sent = 2, Received = 2, Lost = 0 (0% loss),
Approximate roundtrip times in milliseconds:
Minimum = 0ms, Maximum = 10ms, Average = 2ms

18. Conclusion
 Network Monitoring System is the system
which monitors the system which is connected
in LAN. In case our server, networks are
crashed due to overload of other devices.
 It is easy to understand for user that if color
changes to Green it means that the system is
up in a network, if color changes to Red then it
means that system is down in a network
 For justifying the system is present or not in
network there are some tools of network
monitoring system like PING, Trace route,
switch port mapper

19. Reference
 Books
 Computer Networking by author James
Kurose and Keith Ross
 Computer network and interface by author
Furrosion
 Links
 www.wikipedia.org
 http://www.devdaily.com/java/java-ping-class