Which device provides the main means in the GMDSS for locati

The main function of a processor is to(68)and carry out instructions which usually consist of operation and(69). The term to measure the speed of the processor is called a Megahertz(MHz), which means million(70)per second.

A．translate

B．interpret

C．describe

D．store

The network technician is troubleshooting a network issue by implementing a new security device.After installing and configuring the device, which of the following steps should the technician takeNEXT?（）

A. Verity full system functionality

B. Identify the main problem and question the user

C. Document their findings, actions, and outcomes

D. Escalate the issue to upper management

In the open systems interconnection (OSI) reference model, "layer" means one of seven conceptually complete,(71) arranged groups of services, functions, and protocols, that extend across all open systems.Application layer provides means for the application(72) to access the OSI environment. Presentation layer provides for the selection of a common syntax for representing data.(73) layer provides the means necessary for cooperating presentation entities to organize and synchronize their dialog and to manage their data exchange. Transport layer provides a reliable end-to-end data transfer service. Network layer provides for the entities in the transport layer the means for transferring blocks of data, by(74) and switching through the network between the open systems in which those entities reside. Data link layer provides services to transfer data between network layer entities. Physical layer provides the mechanical, electrical, functional, and procedural means to establish, maintain and(75) physical connections for transfer of bits over a transmission medium.

A．rankly

B．levelly

C．layered

D．hierarchically

Adjust ______by means of lead wire.

A.the clearance of the main bearing

B.the diameter of main bearing

C.the gap of main bearing

D.the tolerance of main bearing

Which of the following can best summarize the main idea of the passage?

A. With no Retriever, thousands of laptops are stolen every year.

B. A new software provides a means to reduce laptop theft.

C. Retriever has helped to find thieves and lost computers.

D. A new program offers a communication platform. with the thief.

A. Supports up to 1500 WX devices.

B. Simplifies software deployment of WX devices.

C. Provides a scheduler for device management tasks.

D. Support is offered for both UNIX- and Windows-based products.

E. Provides views of the immediate status of deployed devices and the service tunnels.

is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication。

A．The virtual address

B．The subnet address

C．The MAC address

D．The IP address

TCP/IP is a communication protocol, which provides many different networking services. The TCP/IP Internet protocol suite is formed from two standards: the TCP （Transmission Control Protocol） and the IP（Internet Protocol）.

（72） means it is on the transport layer.

A.ISO

B.IP

C.OSI

D.TCP

Which of the following components provides a direct source of seawater for the fire main system?

A.Rose box

B.Sea chest

C.Sluice(闸式) valve

D.Fire pump stuffing box

Which device provides the main means in the GMDSS for locating ships in distress or their survival craft ________．

A.Radio direction finder

B.Satellite EPIRBs

C.MF/HF DSC

D.VHF homing device