Answer:
MAC Addresses (Destination and Source MAC address)
Explanation:
A switch has 3 primary functions:
- Forward frames
- Learn addresses
- Avoid loops
An Ethernet frame has the header, data and trailer and there are two specific fields in the header that helps the switch to know where to send data in future transmissions.
- destination MAC address
- source MAC address
every Ethernet frame has this and when the frame hits a switch or any device, any device can look at it ( an Ethernet frame ) and know where it is suppose to go and where it came from.
Every switch has a MAC address table where it stores MAC addresses of different computers on the network.
Example:
When a PC1 sends a frame to PC2 through a switch, the switch looks at the header of the Ethernet frame for the source mac address and adds the source MAC address to its MAC address table and also the port that it came through.
simply put:
A switch looks at the source MAC address to see if it knows it already, if it does. Great! no need to add it again to it's address table.
If it doesn't, it adds it's source address and the port that the frame came from.
This basically how the switch populates its MAC address table.
5. Positive and Negative Impact of chemical industries.
Here are the positive impacts first:
=> It can discover a chemical product that can be helpful for us humans like physical beautification, medicines to a certain diseases and more that is beneficial to our health.
=> It can also help us learn more about the chemicals that is presents in our planet.
Here are the lists of the negative impacts:
=> Some Chemicals can be harmful to the nature and also to our body.
=> Some chemical can cause diseases especially those harmful ones.
Answer:
The program plan requires the design of the gui program form
Explanation:
The program plan will be as follows:
take 4 label and 4 text box and 1 button and modify the property of controls to design the gui form.
use 6 if statements and 1 else statement.
use or operator for comparison.
show message in textbox.
program code:
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...
Answer: Joystick is the only one that makes sense, a stylus and digitizer are both used on drawing tablets, not computer games.
