Internet of Things course

QUESTION 11 Amplitude Modulation is in which layer of communication network? Physical Layer MAC Layer Network Layer Transport Layer QUESTION 12 Which of the following is not a common network topology? Bus Ring Rectangle Mesh QUESTION 13 Which of the followings is wireless transmission media? Air Vacuum Water All of the above QUESTION 14 Which of the following is right? An antenna is an electrical conductor or system of conductors used for radiating electromagnetic energy An antenna is an electrical conductor or system of conductors used for collecting electromagnetic energy An antenna is an electrical conductor or system of conductors used for radiating electromagnetic energy or for collecting electromagnetic energy None of the above QUESTION 15 Which computer network layer does Media Access Control belong to? Physical layer Data link Layer Network Layer Application layer