计算机专业英语期末必考题及答案总结

计算机专业英语期末必考题及答案总结

switch

Switches (Switch) is an identification based on the MAC ( network card hardware address) , complete the package forwarding packets functional network equipment

A router is a device that forwards data packets between computer networks, creating an overlay. 路由器（Router）是连接因特网中各局域网、广域网的设备，它会根据信道的情况自动选择和设定路由，以最佳路径，按前后顺序发送信号的设备

路由器是为信息流或数据分组选择路由的设备。Router is a routing device to select the flow of information or data packet

Router (Router) is connected to the Internet , LAN, WAN equipment ,

it will automatically select the channel and routing settings , the best path , according to the equipment before and after the order to send signals

区别

Switch refers to any network -level data relay equipment (although multi-finger bridge ) , while the router is more focused on the network layer

The first switch is a data link layer in the OSI / RM open architecture , which is the second layer , while the router is a beginning design work at the network layer of the OSI model

The switch is a physical address or MAC address to determine the destination address of the forwarding data . While the router is to use the IP address)to determine the data forwarding address交换机是一个物理地址或MAC地址来确定转发数据的目的地址。而路由器是使用的身份证号码不同的网络（即IP地址）来确定数据转发的地址

Traditional switch can only be split collision domain and broadcast domain can not be split ; router can split a broadcast domain

传统的交换机只能分割冲突域和广播域，不能分割;路由器可以分割广播域

路由器支持NAT Router supports NAT而交换机不支持

Windows os

The Windows operating system ( English: Windows ) operating system under Microsoft DOS in 1985 . Microsoft Windows is a color graphical interface operating system . Support Companions function . The default platform is composed of the taskbar and desktop icons Running Windows program operations are controlled by the mouse and keyboard . The left mouse button click Default is selected command, the left mouse button double-click the run command

Windows操作系统是一款由美国微软公司开发的窗口化操作系统。采用了GUI图形化操作模式，比起从前的指令操作系统如DOS更为人性化。Windows操作系统是目前世界上使用最广泛的操作系统

计算机专业英语期末必考题及答案总结

The Windows operating system is a development by the U.S. Microsoft，It uses a GUI graphical mode of operation，Compared to the previous instruction operating system such as DOS more humane. The Windows operating system is the world's most widely used operating system

Unix

UNIX, is a powerful multi-user, multitasking operating system that supports a variety of processor architectures , in accordance with the classification of the operating system , and a timesharing operating system .

Support multi-tasking , multi-user system

Open source code

Simple Mail Transfer Protocol

Simple Mail Transfer Protocol (SMTP) is an Internet standard for electronic mail (e-mail) transmission across Internet Protocol networks.，is a reliable and valid e-mail transmission protocol . It's based on the text of the Protocol. Specifies one or more recipients of a message，and then the message text is transferred。 mainly used to transfer e-mail messages between systems and the delivery of notifications relating to the letter.

WAN

Used to achieve the interconnection of different parts of the LAN or MAN , remote computer, network computer communication between the different regions, cities and countries .

3,

WAN is a hybrid network that contains a variety of network LAN is a single network

WAN IP address can not be repeated

LAN IP address is assigned within the LAN , the LAN IP address can be reused , do not influence each other

The WAN contained greater range than the LAN

Third-generation programming language

A third-generation programming language (3GL) is a refinement of a second-generation programming language.

The third generation brought refinements to make the languages more

计算机专业英语期末必考题及答案总结

programmer-friendly

This includes features like improved support for aggregate data types, and expressing concepts in a way that favours the programmer, not the computer

第三代语言(3GL)是设计更容易被人们所理解的高级程序语言，包括像命名变量的事物。Fortran, ALGOL 和 COBOL 是这种语言的早期例子。大部分“现代”语言(BASIC, C, C++)是第三代语言。大部分 GLs 支持结构化语言设计。

The third-generation language (3GL) programming language design is more easily

understood , including things like named variables . Fortran , the ALGOL and COBOL are early examples of this language . The most " modern" languages ( BASIC, C and C + +) is the third generation language . Most of the GLs to support the design of structured language .

High-level programming language ( third-generation language)include:

Traditional high-level programming language,such as FORTRAN、COBOL、ALGOL、BASIC Common structured programming languages,such as PL/1，PASCAL，C和Ada。

Special language APL、Lisp、PROLOG、Smalltalk、C++、FORT

3.

4GL or fourth-generation language is more close to natural language than 3GL language To access the database language is often referred to as the 4GL

The liquid crystal display ( English: Liquid Crystal Display , often referred to as LCD ) flat thin display device by a number of color or black and white pixels , placed on the front side of the light source or reflector

OSI/ISO

OSI模型，即开放式通信系统互联参考模型（Open System Interconnection Reference Model），是（ISO）提出的一个试图使各种计算机在世界范围内互连为网络的标准框架，简称OSI。

Proposed by the International Organization for Standardization (ISO), an attempt to make a variety of computer networks worldwide interconnection standard framework , referred to as the OSI .

计算机专业英语期末必考题及答案总结

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