While the Pilot is maneuvering the vessel to a dock，what is the PRIMARY responsibility of the watch officer?（）

For the author, a primary effect of any diary is that it ______.

According to the passage one of the problems for pupils entering secondary schools is that ______.

The primary reason for placing covers over storage batteries is to（）.

●The principle for a stack memory to store data is (72) ．

Before installing a new device， a technician checks to make sure the device is on the HCL. Which of the following is the advantage of having an HCL device？（）

What is the primary purpose of the passage?

Which of the motors for the devices listed below is fitted with an instantaneous overload relay?（）

As a frame leaves a Layer 3 device, the Layer 2 encapsulation information is changed from what it was when it entered the devicE.For what two reasons can this happen? （）

Ezonexam is installing IP phones in a new office. The phones and office computers connect to the same device. To ensure maximum throughout for the phone data sessions, the company needs to make sure that the phone traffic is on a different network from that of the office computer data traffic. What is the best network device to which to directly connect the phones and computers and what technology should be implemented on this device? (Choose two)

（72）is a client/server protocol for transferring files across the Internet.

The data station usually means a(71)unit that provides data for transmission, that accepts transmitted data, and that performs all functions necessary for communication with another functional unit. Data stations may be divided into two kinds, the primary stations and the secondary stations, (72)control functions.In(73)data link control, the primary station is the data station that supports the primary control functions of the data link, generates commands to be transmitted, and interprets received responses. Specific responsibilities assigned to the primary station include initialization of control signal interchange, organization of data flow and actions regarding error control and error recovery functions. The secondary station executes data link control functions as (74)by the primary station, interprets received commands and (75) responses to be transmitted.