Question

true or false? MAC addresses are a layer three address type

Answer 1

true

Answer 2

how is it a true statement?

Answer 3

It's false. MAC addresses are hardware, Layer 1.

Answer 4

OSI or TCP layer? Well, does not matter... it is not 3 in either of those. Though, if it is OSI then what rsmith6559 said is wrong. The OSI layers vs TCP Layers:

\(\begin{array}{|r|l|l|} \hline
\text{TCP Layer 4} & Application &
\begin{array}{|r|l|} \hline
\text{OSI Layer 7} & Application \\ \hline
\text{OSI Layer 6} & Presentation \\ \hline
\text{OSI Layer 5} & Session \\ \hline
\end{array}
\\ \hline
\text{TCP Layer 3}& Transport &
\begin{array}{|r|l|} \hline
\text{OSI Layer 4} & Transport \hspace{14pt} \\ \hline
\end{array}
\\ \hline
\text{TCP Layer 2}& Internet &
\begin{array}{|r|l|} \hline
\text{OSI Layer 3} & Network \hspace{20.5pt} \\ \hline
\end{array}
\\ \hline
\text{TCP Layer 1}& Network~ Access &
\begin{array}{|r|l|} \hline
\text{OSI Layer 2} & Data~ Link \hspace{12.5pt} \\ \hline
\text{OSI Layer 1} & Physical \\ \hline
\end{array}
\\ \hline
\end{array}\)

So for OSI is is layer 2 but for TCP all that stuff is dumped into layer 1. In OSI they differentiate between the physical media; glass, wire, radio, etc; and how it is addressed. In TCP they just lump all that together, just like they lump all the user level stuff at the higher levels together.

Answer 5

It's true. XD