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:
true
Explanation:
The command:
find -empty -type f -exec rm { } \;
carries out the following steps.
1) Finds all the empty files in the current directory and its subdirectories.
2) For each of the identified files, it executes the command specified as the parameter to exec option,namely, rm <filename>.
So effectively it removes all empty files in the directory tree starting at the current directory.
Keeping in mind the role the order of precedence plays in equations, what would Excel display as the result of the following equation?
=(24+75)/(6*3)
=99/18
= 5.5
18)99.0.
90.0
9.0
D. 5.5
Answer:
Option A - They are responsible for writing programming
Option B - They are usually strong problem-solvers
Explanation:
A software engineer needs to be a strong problem solver and he/she must be able to write program/code. He/She is not required to conduct experiments in labs and also it is not essential for them to hold masters degree as even the non computer science or IT background people are working as software engineer.
Hence, both option A and B are correct
Answer:
Explanation:
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