The variables must begin with a letter of the alphabet, a dollar sign or a underscore. After the first character you may add numbers as well. All special characters besides the dollar sign and underscore and not allowed in variables.
The data link layer software would replace the MAC address of the next hop or gateway when the destination address of a network packet is to a remote network.
<h3>What is a
data link layer?</h3>
The data link layer is the second layer of the OSI model and it can be defined as an interface between the network and physical layer. Also, it comprises two (2) main sublayers and these include the following:
- Logical link control (LLC) layer.
- Media access control (MAC) layer.
In Computer networking, the data link layer software would replace the MAC address of the next hop or gateway when the destination address of a network packet is to a remote network.
Read more on data link layer here: brainly.com/question/13131540
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A percent can be used in a filename.