Data transfer is slow between the source and destination. Th

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

A general purpose MySQL instance is configured with the following options:—log-slow-queries—long-query-time=,0001—log-slow-admin-queries—general-log—log-bin—binlog-format=STATEMENT—innodb-flush-log-at-trx-commit=1Which three statements are true（）。

A.The General Query Log records more data than the Binary Log

B.The binary Log records more data than the General Query Log

C.The Slow Query Log records more data than the General Query Log

D.The General Query Log records more data than the Slow Query Log

E.The Slow Query Log records more data than the Binary Log

F.The Binary Log records more data than the Slow Query Log

You are the administrator of several SQL Server 2000 computers. A data Transformation Services (DTS) package uses native OLE DB providers to transfer data between the servers. Connection details for the servers are specified in .udl files. The .udl files are frequently updated as connection details change.

You want to distribute the DTS package as a file to developers in your company. You want to make sure connection details are available to developers who receive the DTS package.

Which two tasks should you perform? (Each correct answer presents part of the solution. Choose two)

A．Enable the Always read properties from UDL file option in the Connection Properties dialog box.

B．Disable the Always read properties from UDL file option in the Connection Properties dialog box.

C．Delete the .udl files and store connection details in the registry by using system data source names.

D．Delete the .udl files, and store connection details in the registry by using user data source names.

E．Make the .udl files available on a network share.

You are the administrator of a SQL Server 2000 computer. The server contains a database that stores financial data. You want to use Data Transformation Services packages to import numeric data from other SQL server computers. The precision and scale values of this data are not defined consistently on the other servers.

You want to prevent any loss of data during the import operations. What should you do?

A．Use the ALTER COLUMN clause of the ALTER TABLE statement to change data types in the source tables. Change the data types so that they will use the lowest precision and scale values of the data that will be transferred.

B．Use the ALTER COLUMN clause of the ALTER TABLE statement to change data types in the destination tables. Change the data types to reflect the highest precision and scale values involved in data transfer.

C．Set a flag on each DTS transformation to require an exact match between source and destination columns.

D．Set the maximum error count for each DTS transformation task equal to the number of rows of data you are importing. Use an exception file to store any rows of data that generate errors.

E．Write Microsoft ActiveX script. for each DTS transformation. Use the script. to recast data types to the destinations precision and scale values.

is the 4th layer of the OSI reference model responsible for reliable network communication between end nodes.

A．Data link layer

B．Session layer

C．Transport layer

D．Application layer

USER_DATA is a nonencrypted tablespace that contains a set of tables with data. You want to convert all existing data in the USER_DATA tablespace and the new data into the encrypted format.Which methodswould you use to achieve this?（）

A. Use Data Pump to transfer the existing data to a new encrypted tablespace

B. Use ALTER TABLE MOVE to transfer the existing data to a new encrypted tablespace

C. Use CREATE TABLE AS SELECT to transfer the existing data to a new encrypted tablespace

D. Enable row movement for each table to be encrypted and then use ALTER TABLESPACE to encrypt the tablespace

E. Encrypt the USER_DATA tablespace using the ALTER TABLESPACE statement so that all the data in the tablespace is automatically encrypted

The "main storage" normally means that part of internal storage into which instructions and other data must be loaded for subsequent execution or processing. In large computing systems, the term "main storage" is(71) to "memory". "Buffer" mainly indicates a special-purpose storage or storage area allowing, through(72) storage, the data transfer between two functional units having different transfer characteristics. A buffer storage is used between non-synchronized devices or where one is(73) and the other is parallel or between those having different trans far rates. "(74) (memory)" is also a special-purpose buffer storage, smaller and faster than main storage, used to hold a copy of instructions and data obtained from main storage and likely to be needed next by the processor. "Register" is commonly composed of a part of internal storage having a specified storage(75) and usually intended for a specific purpose.

A．suitable

B．optional

C．choice

D．preferred

In low-speed network，it is usually adequate to wait for congestion to occur and then react to it bytelling the source of packets to slow down．In high-speed networks，this approach often works poorly，because in the(71) between sending the notification and notification arriving at the source，thousands of additional(72) may arrive．In ATM network，a major tool for preventing(73)is(74)control．When a host wants a new virtual(75)，it must describe the traffic to be offeredand the service expected．

(69)

A．interval

B．time

C．slot

D．delay

In low - speed network ,it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high - speed networks, this approach often works poorly, because in the(71)between sending the notification and notification arriving at the source, thousands of additional(72)may arrive. In ATM network , a major tool for preventing(73)is(74)control. When a host wants a new virtual(75),it must describe the traffic to be offered and the service expected.

A．interval

B．time

C．slot

D．delay

Data transfer is slow between the source and destination. The quality of service requested by the transport layer in the OSI reference model is not being maintained. To fix this issue, at which layer should the troubleshooting process begin?（）

A. presentation

B. session

C. transport

D. network

E. physical