题目内容
（请给出正确答案）
●(72) is a device that allows a computer to transmit information over a telephone line.
(72) A．Disk
B．Modem
C．Printer
D．Display
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更多“●（72) is a device that allows …”相关的问题
●In the following, the input device is (72) ．
(72)
A． keyboard
B． monitor
C． printer
D． plotter
The display screen is the most common (72) device used to show you what the computer is doing．
A．input
B．printing
C．output
D．electronic
（72）
A. input
B. printing
C. output
D. electronic
（72）
A. application
B. information system
C. operating system
D. iterative
The(72)has several major components, including the system kernel, a memory management system, the file system manager, device drivers, and the system libraries.
A．application
B．information system
C．operating system
D．iterative
试题（71）～（75）
A Bluetooth device can be either a master or a slave and any of the devices within a （71）can be the master. There is only one master and there can be up to （72） active slave devices at a time within a single network. In addition, a device may be a standby slave or a parked slave. There can be up to （73） parked slaves. If there are already maximum number of active slaves, then a parked slave must wait until one of the active slaves switches to （74） mode before it can become active. Within a network, all （75） communications are prohibited.
（71）
A. Wireless LAN
B. Wireless MAN
C. Cellular radio network
D. Piconet
（72）
A. 7
B. 15
C. 63
D. 255
（73）
A. 127
B. 255
C. 511
D. 1023
（74）
A. master
B. standby slave
C. parked slave
D. active slave
（75）
A. master-to-master
B. master-to-slave
C. slave-to-slave
D. slave-to-master
WAP uses (71) , which includes the Handheld Device Markup Language (HDML) developed by Phone.com. WML can also trace its roots to eXtensible Markup Language (XML). A markup language is a way of adding information to your (72) that tells the device receiving the content what to do with it. The best known markup language is Hypertext Markup Language. (73) HTML, WML is considered a meta. language. Basically, this means that in addition to providing predefined (74) , WML lets you design your own markup language (75) . WAP also allows the use of standard Internet protocols such as UDP, IP and XML.
A．HTML
B．XML
C．DML
D．WML
●Flow control is a function that prevents network congestion by ensuring that (71) do not overwhelm (72) with datA．There are three commonly used methods for handling network congestion ． (73) is used by network devices to temporarily store bursts of excess data in memory until they can be processed． (74) are used by receiving devices to help prevent their buffers from overflowing ． (75) is a flow-control scheme in which the source device requires an acknowledgment from the destination after a certain number of packets have been transmitted．
(71)~(72)A．transmitting devices
B．transmitted devices
C．receiving devices
D．received devices
(73)~(75) A．Buffer
B．Source-quench messages
C．Buffering
D．Windowing
NET is both a business strategy from Microsoft and its(71)of(72)support for what are known as Web services, the ability to use the Web rather than your own computer for various services. Microsoft's goal is to provide individual and business users with a(73)interoperable and Web-enabled interface for applications and computing devices and to make computing activities increasingly Web browser-oriented. The .NET(74)includes servers; building-block services, such as Web-based data storage; and device software. It also includes Passport, Microsoft's fill-in-the-form-only-once identity(75)service.
A．individual
B．collection
C．set
D．unit
● (71) is a one-way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string．
(72) is a protocol that most USENET machines now use it to allow news articles to propagate from one machine to another over a reliable connection．
(73) is an approach preferred by cable TV providers ．In this solution the fiber terminates at an optoelectrical converter and the final segment is a shared coaxial cable．
(74) is a device used to connect two separate network that use different communication protocol．
(75) is a digital-to-digital polar encoding method in which the signal level is always either positive or negative．
(71) A． MD
B．RSA
C．DES
D．MIB
(72)A．RTP
B．RTTPC FTP
D．NNTP
(73) A． ADSL
B．FTTC
C．HFC
D．FTTH
(74)A ．Router
B．Gateway
C．Bridge
D．hub
(75)A ．NNI
B．NRZ
C．NAK
D．NVT
