Modems, AP, CSU / DSU notes

Modems: Modems perform two main functions:  Modulation / Demodulation Analog signal vs Digital Modulation: converts digital to analog Demodulate: analog to digital Common Modem types: Cable modem ADSL (asymmetric digital subscriber line)  downstream faster then upstream  (SDSL)  symmetrical….. DSL (digital subscriber line) Wireless Access Points: device that allows wireless devices to connect to a wired […]

Leap Year Form App

[code language=”csharp”] using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace LeapYearForm { public partial class LeapYear : Form { public LeapYear() { InitializeComponent(); } static bool isLeapYear(int checkYear) { int year = checkYear; bool is_a_leap_year; if ((year % 4) == 0) { if ((year […]

Leap Year Console App

[code language=”csharp”] using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace Leap_Year { class Program { static void Main(string[] args) { int Year; int loopCount = 1; bool Continue = true; string Stop; bool leapYes = false; Console.WriteLine("This program tells you if the year has a leap year" + " and tells you […]

P&L Chapter 3 Study Guide

Disadvantages of Unstructured Spaghetti Code – pg 84 – general info – unstructured programs – structured programs Understanding the Three Basic Structures – pg 86 – general info – sequence, selection, loop – details of selection structure – pg 87 – dual-alternative (then) – single-alternative – null – loop structure – pg 88 – stacking […]

Hubs, Switches, and Routers – Study Guide

Connecting Multiple Computers – pg 153 – general info – Network, Subnets, and Subnetworks – pg 154 Understanding Physical Ports – pg 156 – Identifying the Number and Type of Ports – general info Comparing Hubs and Switches – pg 158 – Understanding Collisions Domains – pg 159 – Identifying Collisions in a Hub and […]