Other Programming & Computer Science Answers

Research a Wireless LAN

Suppose you have a DSL connection to the Internet in your home and you want to connect two laptops and a desktop computer in a wireless network to the Internet. You need to purchase a multi-function wireless router. You also need a wireless adapter for the desktop computer. (The two laptops have built-in wireless networking.) Use the web to research the equipment needed to create the wireless LAN and answer the following:

1. Look for two manufacturers showing two different multi-functional wireless routers. What are the brand, model, specifications or features, and price of each router?
2. Look for two manufacturers showing two different wireless adapters a desktop computer can use to connect to the wireless network. Include one external device that uses a USB port and one internal device. What are the brand, model, specifications or features, and price of each device?
3. Which router and wireless adapter would you select for your home network? What is the total cost of both devices?

Research a Network Upgrade

An IT support technician is often called on to research equipment to maintain or improve a computer or network and make recommendations for purchase. Suppose you are asked to upgrade a small network that consists of one switch and four computers from 100BaseT to Gigabit Ethernet. The switch connects to a router that already supports Gigabit Ethernet. Do the following to price the hardware needed for this upgrade:

1. Compare features of the three network adapters. What additional information do you need to know before you make your recommendation?
2. Make your recommendations based on the moderate (middle-of-the-road) choices. What is the total price of the upgrade, including one switch and four network adapters?
3. What is one more question you need to have answered about other equipment before you can complete the price of the upgrade? Explain how you would find the answer to your question.

An IT support technician is often called on to research equipment to maintain or improve a computer or network and make recommendations for purchase. Suppose you are asked to upgrade a small network that consists of one switch and four computers from 100BaseT to Gigabit Ethernet. The switch connects to a router that already supports Gigabit Ethernet. Do the following to price the hardware needed for this upgrade:

1. Find three switches by different manufacturers that support Gigabit Ethernet and have at least five ports. Save or print the webpages describing each switch.
2. Compare the features and prices of the three switches. What additional information might you want to know before you make your recommendation for a small business network?
3. Find three network adapters by different manufacturers to install in the desktop computers to support Gigabit Ethernet. Save or print webpages for each NIC.

Assume that the variable num is properly declared as : int num = 7; Construct the equivalent expression using the arithmetic assignment operator to shorten it then evaluate the final value of num.

num = num % 3;

num = num * 4;

num = num + 13;

num = num – 2;

num = num / 3;

Which of the following statement(s) with regard to the Internet is correct?

A. The Internet is a global network that consists of many smaller networks

B. There is good quality control on the Internet

C. Because of the nature of the Internet scientists often question the credibility and validity of information on the Internet

D. Persmission must be obtained form the Independent Internet Quality Control Organization or IIQCO in Berlin before information can be published on the Internet

1.Mention and explain 5 vital components of the Systems Unit e.g. Front side, Back side, Inside Categories of the computer hardware:  

2. Write short notes on the following Input devices:

1. Keyboard
2. Mouse
3. Scanner
4. Joystick
5. Trackball
6. bar code reader 

3. What are Processing devices and give one example. 

4. State the function of the following:

  I. Monitors, Printers

  II. Storage devices.

  III. CD/ DVD drive 

  IV. floppy diskette drive,

  V. hard disk drive 

  VI. Telephone line 

  VII. Modem 

  VIII. Satellite dish 

5. Write short notes on the following:

  a) Operating System

  b) Application software

  C) Spell check functions

  d) Copy

  d) cut

  e) paste

Write a VB program to show different image and description based on the user selection on the combo box.

*set the Visible properties of RichTextBox to False

*set the ComboBox list items to: Cat, Dog, Rabbit

Step 1 – Choose an animal

The PictureBox’s Image will be changed to corresponding Image while the SelectedIndexChanged event of the ComboBox is triggered. 

Tips: The Text of the RichTextBox will be changed at this point.

Step 2 – Checked the Description CheckBox

The RichTextBox will be displayed while the CheckedChanged event of the Description CheckBox is triggered.

You may use the following description:

-Cat: The cat is a domestic species of small carnivorous mammal.

-Dog: The dog or domestic dog, is a domesticated descendant of the wolf, characterized by an upturning tail.

-Rabbit: The rabbits also known as bunnies or bunny rabbits, are small mammals in the family Leporidae (along with the hare) of the order Lagomorpha (along with the pika).

A hole of cross-sectional area 100 c m 2 is cut in a piece of steel at 20 o C . What is the area of the hole if the steel is heated from 20 o C to 100 o C ? The coefficient of linear expansion of steel is 1.10 × 10 − 5 o C

WAP to interface IR sensor to switch ON and switch OFF the room lights based on the number of persons inside the room. If the number of persons inside the room is greater then zero light should be ON and if there is no one inside the room the lights should be switched OFF. Based on the room count you should display on LCD. If no person is inside the room display on LCD “NO PERSON IS INSIDE” otherwise display the number of persons inside the room (count) on the LCD.

WAP to display the values on Seven segment by accepting the values from serial monitor of Arduino IDE.