All Loran-C transmitting stations are equipped with cesium f

Which two statements describe the operation of the CSMA/CD access method, which is in use on the Ezonexam network? (Choose two)

A. After a collision, the station that detected the collision has first priority to resend the lost data.

B. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.

C. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.

D. The use of hubs to enlarge the size of collision domains is one way to improve the operation of the CSMA/CD access method.

E. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.

F. After a collision, all stations involved run an identical backoff algorithm and then synchronize with each other prior to transmitting data.

On a rigid liferaft (SOLAS B pack) which is equipped with all of the required equipment you may NOT find a ______.

A.bailer

B.sponge

C.whistle

D.fishing kit

For the bus, all stations attach, through appropriate hardware()known as a tap, directly to a linear transmission medium, or bus.

A.processing

B.switching

C.routing

D.interfacing

The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of ______．

A.High frequency pulses

B.Combinations of high and low frequency pulses

C.The same frequency for all stations in a chain

D.Varied long and short pulses

Automatic identification systems（AIS）are required to ______．

A.provide safety-related information automatically to shore stations，other vessels and aircraft

B.receive safety-related information automatically from similarly equipped vessels

C.exchange safety-related information with shore-based facilities

D.All of the above

With regard to Ethernet media access methods, which of the following are true?

(Choose all that apply.)

A．A device waits for an electronic signal before transmitting.

B．A device listens and waits until the media is not busy before transmitting.

C．All devices on an Ethernet segment see data that passes on the network medium.

D．Only the sender and the receiver devices see data that passes on the network medium.

E．Ethernet networks allow you to configured devises with higher transmission priority.

Vessels required to be equipped with an approved backfire flame arrester are ______．

A.Those with diesel engines

B.All those with gasoline engines

C.Those with large engines only

D.None of the above

Two stations on the Ezonexam LAN transmit at the same time, resulting in a collision. What happens when a collision occurs on the network? (Choose all that apply)

A．Each device on the Ethernet segment stops transmitting for a short time.

B．A jam signal informs all devices that a collision occurred.

C．When data transmission resumes, the devices that were involved in the collision have priority to transmit.

D．The devices that are involved in the collision stops transmitting for a short time.

E．The collision invokes a random back-off algorithm.

The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with ______．

A.An atomic time standard

B.Daylight Savings Time

C.Eastern Standard Time

D.Greenwich Mean Time

What is meant by the term“radio silence”________．

A.Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channel

B.Stations remaining off the air to safeguard proprietary information

C.Two three-minute silent periods，at 15 and 45 minutes after the hour，that provide a transmitting“window”for distressed vessels to transmit distress alerts using J3E

D.Communications on a distress frequency or channel is banned for 24 hours following the cessation of the distress traffic