Meee plzzzzz First!............
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:
ROM stands for read-only memory. It's used to store the start-up instructions for a computer, also known as the firmware. Most modern computers use flash-based ROM. It is part of the BIOS chip, which is located on the motherboard.
B,the printer only receives signals from the computer and prints them.
Answer:
c. nbtstat -a 193.145.85.202
Explanation:
Nbtstat is a TCP/IP utility which is used to display the current connections and statistics of TCP/IP using NetBIOS over TCP/IP (NetBT).
It is installed on a computer running Microsoft Windows when the TCP/IP protocol stack is installed.
Also, it is very useful when we want to troubleshoot NetBIOS name resolution problems.
One can run nbtstat -a < ComputerName > to obtain the local NetBIOS name table on <ComputerName> and its MAC address
