In Which OSI Model Layer Do Hubs Operate

question 3

Multiple Choice

In which OSI model layer do hubs operate?

• A) Physical
• B) Network
• C) Data Link
• D) Physical and Data Link

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Definitions:

Prostaglandin

Class of physiologically active substances present in many tissues; among its effects are vasodilation, stimulation and contraction of uterine smooth muscle and the promotion of inflammation and pain.

Glucocorticoids

These are a class of corticosteroids that play a role in glucose metabolism, anti-inflammatory processes, and immune system modulation.

Congenital Birth Defects

Conditions present at birth that can affect the structure and function of a baby, varying widely from mild to life-threatening.

Teratogen

Any agent or factor that causes malformation of an embryo.