At what Open System Interconnection (OSI) layer are virtual circuits established, maintained and terminated?

a. Network
b. Physical
c. Data link
d. Transport


Ans: d. Transport

Computer Science & Information Technology

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When many LAN devices are connected in a continuous loop, it is called a

a. star network b. mesh network c. bus network d. ring network

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A wired network interface card is sometimes call a(n) ________ card

A) modulator-demodulator B) PictBridge C) Wi-Fi D) Ethernet

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A Subject Alternative Name (SAN) digital certificate, is also known as a Unified Communications Certificate (UCC).

Answer the following statement true (T) or false (F)

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A user's laptop screen is extremely dim. A technician attempts to alter the brightness using function keys and the BIOS, but the screen never changes in brightness. Which of the following is MOST likely the cause?

A. Battery failure B. Bulb failure C. Display driver is corrupted D. Backlight failure

Computer Science & Information Technology