Which of the following routing protocols is a link state and uses a backbone called area 0?

Consider the following relation:

R (Doctor#, Patient#, Date, Diagnosis, Treat_code, Charge) In this relation, a tuple describes a visit of a patient to a doctor along with a treatment code and daily charge. Assume that diagnosis is determined (uniquely) for each patient by a doctor. Assume that each treatment code has a fixed charge (regardless of patient). Is this relation in 2NF? Justify your answer and decompose if necessary. Then argue whether further normalization to 3NF is necessary, and if so, perform it.

______, with respect to communications, is the time it takes a signal to travel from one location to another on a network.

Fill in the blank(s) with the appropriate word(s).