4 questions about networking

I need short answers for these questions : 

a)  Which of the following is connectionless – Ethernet, IP, TCP? Explain why.

b)  Which of the following is unreliable – Ethernet, IP, TCP, UDP? Explain why.

c)  A tester shows that a UTP cord has too much interference. What might be causing the problem? Give at least two alternative hypotheses.

d)  You find that every time you heat your frozen dinner in the microwave, your hulu plus video streaming starts buffering on your laptop. What could be the problem?

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