At which layer of the OSI model, does SMTP (Simple Mail Transfer Protocol) operate?

What do you call a medium which only allows a single channel?

According to the OSI model, at which layer are network addresses assigned?

Which cabling media does not suffer from Electro-Magnetic Interference(EMI)?

What is the X.25 protocol?

Which network topology does Ethernet use?

Ethernet standards are specified at the ________ layer.

Ethernet is easy to ____.

Ethernet has only a single standard at the ________ layer.

Compared with education, the primary goal of training is to ____.

An rfid reader is also called a(n) ______.