Transcript networks lab

CS1306 - Networks
Laboratory
HANDLED BY,
A.MAHESH PRIYA L/IT
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LIST OF EXPERIMENTS
1.Write a socket Program for Echo / Ping /
Talk commands.
2. Create a socket (TCP) between two
computers and enable file transfer
between them.
3. Write a program to implement Remote
Command Execution (Two M/Cs must
be used)
4. Write a program to implement CRC and
Hamming code for error handling.
5. Write a code simulating Sliding Window
Protocols.
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6.A Client − Server application for
chat.
7. Write a program for File Transfer
in client–server architecture using
following methods.
a. USING RS232C
b. TCP/IP
8. Perform a case study about the
different routing algorithms to
select the network path with its
optimum and economical during
data transfer.
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a. Shortest path routing
b. Flooding
c. Link State
d. Hierarchical
9 and 10 Study of Network
Simulators like NS2 / Glomosim
/ OPNET.
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Ex.1A
Implementation of Echo
Command
•
•
•
•
Start the program.
Get the input as command line.
Display the input on the screen.
Terminate the program.
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SAMPLE OUTPUT
[satheesh@linuxserver ~]$ cc ec.c
[satheesh@linuxserver ~]$ ./a.out
welcome to networks lab
welcome to networks lab
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Ex.No.1B
Implementation of Ping Command
1.start the program.
2.Find the System IP address.
3.Execute the program with IP
Address.
4.Check whether the system is
eligible to connect with network.
5.Stop the program.
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SAMPLE OUTPUT
• [root@linuxserver ~]$ cc rpcli.c
• [root@linuxserver ~]$ ping 172.16.1.20
• PING 172.16.1.20 (172.16.1.20) 56(84)
bytes of data.
• 64 bytes from 172.16.1.20: icmp_seq=1
ttl=64 time=0.021 ms
• 64 bytes from 172.16.1.20: icmp_seq=2
ttl=64 time=0.009 ms
• 64 bytes from 172.16.1.20: icmp_seq=3
ttl=64 time=0.017 ms
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Ex.No.3
REMOTE COMMAND EXECUTION
1.Start the Program.
2.write seperate program for server and
client.
3.Declare the variable and structure of
program.
4.Create socket using socket function.
5.Execute the server program.
6.Execute the client program.
7.enter the command to the server.
8.Get response from the server.
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9.Stop the program.
SAMPLE OUTPUT
Client:
[staffs@linuxserver ~]$ cc rpcli.c
[staffs@linuxserver ~]$ ./a.out 127.0.0.1
Enter the command to server
who
Server:
[satheesh@linuxserver ~]$ ./a.out
Command received from client 1 is who
satheesh pts/0
2010-04-09 22:31 (172.16.1.241)
staffs pts/1
2010-04-09 22:34 (172.16.1.241)
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Ex.No 4A
CYCLIC REDUNDANCY CHECK
Aim:
Start the program.
Get the data to be transmitted.
Take it as dividend.
Get the divisor.
Add n-1 0’s with the data where n is the
divisor.
• Divide the data by the divisor and append
the remainder as CRC.
• Data + CRC is transmitted to receiver.
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•
•
•
•
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• In the receiving end, the data
received is divided by the same
divisor and the remainder is
checked whether all the bits are
0’s.
• If all the bits are 0’s, then there is
no error.
• Stop the program.
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SAMPLE OUTPUT
1.Without error
2.With error
3.Exit
Enter the option:
1
Enter the dividend:11000
Enter the divisor:11
Computed data + CRC is:11000
Data is transmitted
Data is received
Received data+CRC:11000
Remainder is :00000
Data is received correctly
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Ex.No.4B
Hamming Code Implementation
1.Start the program.
2.Get the 7bit data to be tranmitted.
3.Add Parity check bits in 1,2,4,8th
positions.
4.11 bit data is transmitted to
receiver 5.In receiving end check
the data using same process which
is done by receiver.
6.find the corresponding error bit.
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7.stop the program
SAMPLE OUTPUT
Enter the data string
1
1
1
1
0
1
0
The transmitting data is:
11111010010
•
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Received data:
1
0
1
1
1
0
1
0
0
1
0
Error bit is:1 0 1 0
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Ex.No.5
Sliding Window Protocol
Simulation
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Start the program.
Get the frame size of the sender.
Get the frame size of the receiver.
Send the frames from sender.
Receive the frames in receiver side.
Send the acknowledgement.
Terminate the program
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SAMPLE OUTPUT
Sending one frame...
Sender Window
|
Received one frame....
Receiver Window
|
Sending ACK for received frames 1
Receiver Window
--|00|
--Received ACK 2
Sender window:
--|00|
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Sending ACKPowerpoint
for received
frames 0
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Ex.No.6
A Client Server Application for Chat
•
•
•
•
Start the program.
Open the socket in server side.
Open the socket in client side.
Send the message to client using the
socket.
• Receive the message in client and
display as response.
• In the client side enter the host name
before chat.
• Terminate
the
program.
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SAMPLE OUTPUT
ruby@thermopylae:~$ cc chatclient.c
opening fifo to server
FIFO open waiting
Enter the string set to send:Welcome To
Networks Lab
ruby@thermopylae:~$ ./a.out
Starting FIFO server
FIFO open waiting
from client: Welcome To Networks Lab
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Ex.No.7A
File Transfer using RS-232
Interface
• Start the program.
• Initiate the port for input and output in two
systems.
• Get the file name to be transferred.
• Open the file.
• Open the output port and send the data.
• Close the file.
• In the receiving end open the input port.
• Set the port to receive the data.
• Get the data and display on the screen.
• Close the ports.
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• Terminate the program.
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SAMPLE OUTPUT
[staffs@pitstelnet ~]$ cc cli.c
[staffs @pitstelnet ~]$ ./a.out
172.16.1.20 source.txt 8000
File send over RS232
[staffs@pitstelnet ~]$
[[staffs@pitstelnet ~]$cc ser.c
[staffs@pitstelnet ~]$ ./a.out 8000
File received from client. Socket
closed.
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[staffs@pitstelnet
~]$
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Ex.No.7B
File Transfer using TCP/IP
Server side File transfer Algorithm
1 .Start the program.
2.Declare the variables and structure
for the socket.
3.Create socket using socket
function.
4.socket is binded as specified port.
5.Using the object the port and
addressPowerpoint
is declared.
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Client side File transfer algorithm:
1.Start the program.
2. Declare the variables and structure.
3.Socket is created and connects
function is executed.
4.If the connection is successful then
server sends the message.
5.The file name that is to be transferred
is specified in the client side.
6.The file is verified from server side.
7. Stop the program.
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SAMPLE OUTPUT
ruby@thermopylae:~$ cc ClientTcp.c
ruby@thermopylae:~$ ./a.out
enter the serverip address 172.16.1.20
socket created
connected to server
enter the file name crc3.c
ruby@thermopylae:~$ cc ServerTcp.c
ruby@thermopylae:~$ ./a.out
socket is created
binded successfully
The file has been transferred
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CASE STUDY
Shortest path routing
Flooding
Link State
Hierarchical
NETWORK SIMULATION:
NS2
Glomosim
OPNET.
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