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.
Answer:
Decision making structures require that the programmer specify one or more conditions to be evaluated or tested by the program, along with a statement or statements to be executed if the condition is determined to be true, and optionally, other statements to be executed if the condition is determined to be false.
Answer:
1. would be B.
2. would be D
3. May I ask if it can be multiple answers?
Explanation:
1. In coding a if statement has to follow if something is true or not. If we are talking about a if and then statement it will skip that block and move to the next block of the "then" part of the "if then" Statement if the first part is reported false
2. This is a easy one, so it has to be either a 3.25 GPA or higher or they have to have either 100 hours or more.
3. waiting for a comment back :)
Answer:
Clock (int hours, boolean isTicking, int diff) // constructor clock
{
this.hours = hours;
// set the instance variable hours
this.isTicking = isTicking;
// set the boolean variable isTicking
this.diff =diff;
//set the instance variable diff
}
Explanation:
Here we declared a constructor clock which has 3 parameter hours,boolean isTicking,and diff.
The int hours, diff is of int type and isTicking is of boolean type. In this constructor, we set the instance variables values by using this keyword.
