Cisco Router DHCP and NAT Configuration
DHCP Server Configuration on Cisco Routers
This section details the commands required to configure a DHCP server on a Cisco router, enabling automatic IP address assignment to network clients.
Mandatory DHCP Commands
- Router(config)# service dhcp
(Enables the DHCP service on the router.) - Router(config)# ip dhcp excluded-address 192.168.1.1 192.168.1.10
(Excludes a specific range of IP addresses from being assigned by the DHCP pool. Both the start and end IP addresses are inclusive.) - Router(config)# ip
Cisco Router Configuration: Password, IPv4, IPv6, VLAN & SSH
Cisco Router Configuration
Remove Router Password
- Power off the router physically.
- Hold CTRL + Pause keys.
Rommon1>confreg 0x2142Rommon2>resetRouter>enableRouter#copy startup-config running-config
Change Passwords
(config)#config-register 0x2102(config)#exitRouter#copy running-config startup-configRouter#reload
Set Router Password
(config)#enable secret (password)(config)#line console 0(config-line)#password (password)(config-line)#login(config-line)#exit(config)#line vty 0 4(config-line)#password
PHP & MySQL: User Data Management
Connecting to the Database
$conexion = new mysqli("localhost", "root", "", "datos");Form Handling (formulario.php)
<title>Save User</title>Saving User Data (operacionguardar.php)
include("conexion.php");
$nombre = $_POST['nombre'];
$Dni = $_POST['Dni'];
$correo = $_POST['correo'];
$query = "INSERT INTO usuarios (nombre, Dni, correo) VALUES ('$nombre', '$Dni', '$correo')";
$resultado = $conexion->query($query);
if ($resultado) {
header("location:tabla.php");
} else {
echo "Insertion Flask MySQL CRUD Application Example
Flask Application Setup
This document outlines a basic CRUD (Create, Read, Update, Delete) application built using Python’s Flask framework and a MySQL database.
Dependencies and Initialization
First, import the necessary libraries and initialize the Flask application and MySQL connection.
from flask import Flask, request, render_template, redirect, url_for, flash
from flask_mysqldb import MySQL
# Initialize Flask app (always use __name__ parameter)
app = Flask(__name__)
# Connect to the Database
Memory Management: Paging, Segmentation, Virtual Memory
Memory Management in Operating Systems
When the operating system (OS) loads a program into memory, it needs to locate code and data, allocate a stack, and initiate its execution. The processor, working with the operating system, translates logical addresses into physical ones.
Requirements for Memory Management
- Relocation: A process might be swapped out to secondary memory (disk) and later reloaded into a different location. The programmer doesn’t know where the program will reside, and this location