sppu-te-comp-content/ComputerNetworksAndSecurity
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Removed A4 & C11 from testing branch.

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This commit is contained in:
K 2024-10-09 20:27:24 +05:30
parent 9ee44a1a76
commit 96fe7c0f7e
Signed by: notkshitij
GPG Key ID: C5B8BC7530F8F43F
2 changed files with 0 additions and 137 deletions
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103
Codes/Code-A4 (Hamming Code).cpp
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#include <iostream>
#include <cmath>
#include <vector>
using namespace std;
// Function to calculate the number of parity bits needed
int calculateParityBits(int dataBits) {
int parityBits = 0;
while (pow(2, parityBits) < dataBits + parityBits + 1) {
parityBits++;
}
return parityBits;
}
// Function to encode the data using Hamming code
vector<int> encodeData(vector<int> data) {
int dataBits = data.size();
int parityBits = calculateParityBits(dataBits);
vector<int> encoded(dataBits + parityBits, 0);
// Set the data bits
int j = 0;
for (int i = 0; i < encoded.size(); i++) {
if (i + 1 == pow(2, j)) {
j++;
} else {
encoded[i] = data[i - j];
}
}
// Calculate and set the parity bits
for (int i = 0; i < parityBits; i++) {
int parityBit = pow(2, i);
int sum = 0;
for (int j = parityBit - 1; j < encoded.size(); j += 2 * parityBit) {
for (int k = 0; k < parityBit; k++) {
if (j + k < encoded.size()) {
sum += encoded[j + k];
}
}
}
encoded[parityBit - 1] = sum % 2;
}
return encoded;
}
// Function to check for errors in the encoded data
int checkForErrors(vector<int> encoded) {
int parityBits = calculateParityBits(encoded.size() - calculateParityBits(encoded.size()));
int errorPosition = 0;
for (int i = 0; i < parityBits; i++) {
int parityBit = pow(2, i);
int sum = 0;
for (int j = parityBit - 1; j < encoded.size(); j += 2 * parityBit) {
for (int k = 0; k < parityBit; k++) {
if (j + k < encoded.size()) {
sum += encoded[j + k];
}
}
}
errorPosition += (sum % 2) * parityBit;
}
return errorPosition;
}
int main() {
int dataBits;
cout<<"Enter the number of data bits:\t";
cin >> dataBits;
vector<int> data(dataBits);
cout<<endl<<"NOTE: Make sure the bits are entered in binary format, separated by spaces.\nEg. 1 0 0 1 (for 4 data bits).";
cout<<endl<<"Enter the data bits:\t";
for (int i = 0; i < dataBits; i++) {
cin >> data[i];
}
vector<int> encoded = encodeData(data);
cout<<endl<<"--------------------"<<endl;
cout<<"Encoded bits are:\t";
for (int bit : encoded) {
cout << bit << " ";
}
cout<<endl<<"--------------------"<<endl;
cout<<endl<<"Enter the encoded bits:\t";
vector<int> receivedEncoded(encoded.size());
for (int i = 0; i < encoded.size(); i++) {
cin >> receivedEncoded[i];
}
int errorPosition = checkForErrors(receivedEncoded);
if (errorPosition == 0) {
cout<<"No errors detected."<<endl;
} else {
cout<<"Error detected at position: "<<errorPosition<<endl;
}
return 0;
}

34
Codes/Code-C11.py
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import paramiko
def install_dhcp_server(remote_host, username, password):
# Create an SSH client
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
try:
# Connect to the remote machine
ssh.connect(remote_host, username=username, password=password)
# Update package list
stdin, stdout, stderr = ssh.exec_command('sudo apt update')
stdout.channel.recv_exit_status() # Wait for the command to complete
# Install ISC DHCP Server
stdin, stdout, stderr = ssh.exec_command('sudo apt install -y isc-dhcp-server')
stdout.channel.recv_exit_status() # Wait for the command to complete
# Optional: you can add more commands to configure the DHCP server here
print("DHCP server installed successfully.")
except Exception as e:
print(f"An error occurred: {e}")
finally:
# Close the SSH connection
ssh.close()
if __name__ == "__main__":
remote_host = "192.168.1.100" # Replace with your remote machine's IP
username = "your_username" # Replace with your SSH username
password = "your_password" # Replace with your SSH password
install_dhcp_server(remote_host, username, password)