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[主观题]

选出应填入下面一段英语中______内的正确答案。 Public Key Infrastructure (PKI) service providers offer

选出应填入下面一段英语中______内的正确答案。

Public Key Infrastructure (PKI) service providers offer organizations fully integrated PKI-managed services designed to secure Intranet, Extranet, Virtual Private Network (VPN), and e-commerce applications. PKI solutions can enable a number of security services, including strong authentication and non-repudiation oftransaction.

eToken enables the users of PKI systems to generate and store(1)and digital certifications inside the token, creating a secure environment and allowing full portability and maximum ease of use. eToken Pro can also perfonn sensitive on-chip(2)operations, ensuring that users' keys are never exposed to PC environment, eToken eliminates the need to store(3)and keys on a hard disk or browser file, or to transmit them across the Internet/Extranet, assuring peace-of-mind and confidence during online communications.

A digital signature is created using the private key of an individual to ensure the validity of his request. This technology can be used to guarantee(4)of various transactions. The strength of either the authentication level or the digital signature relies on the level of protection offered to the private key. eToken PRO offers the maximum level of security, since it enables the use of the private key for signing and authenticating inside the eToken.

The most secure use of authentication involves enclosing at least one certificate with every signed message. The message(5)verifies the certificate using the CA's public key. If the sender's public key is legitimate, the recipient verifies the message's signature. Digital signatures created with a private key are verified with the digital certificate containing the public key.

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更多“选出应填入下面一段英语中______内的正确答案。 Public Key Infrastructure (PKI) service providers offer”相关的问题

第1题

选出应填入下面一段英语中______内的正确答案。 In a public-key cryptosystem, (1) encrypted with th

选出应填入下面一段英语中______内的正确答案。

In a public-key cryptosystem,(1)encrypted with the public key can only be deciphered with the private key from the same(2). Conversely,(1)encrypted with the private key can be decrypted only with the public key. Users can make their public keys(3)available or place them at a key distribution center or others to access. However, the private key must be(4)safe. In public-key systems there's no(5)to find a safe channel for communicating a shared secret key.

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第2题

选出应填入下面一段英语中______内的正确答案。 Rapid application development (RAD) systems purport to

选出应填入下面一段英语中______内的正确答案。

Rapid application development (RAD) systems purport to lighten the developer's(1)by making it easy to program an application with simple intuitive steps.

RAD tools(2)the developer everything needed to construct afully functional application quickly and easily. They make short work of modifying the developed with product to(3)changes after the program is finished. Applications developed with RAD tools are constructed as they are envisioned. As an application's real usefulness(4), the developer armed with a RAD tools should be able to(5)on new features with little fuss.

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第3题

选出应填入下面一段英语中______内的正确答案 The terms FIFO and LIFO refer to two techniques for (1

选出应填入下面一段英语中______内的正确答案

The terms FIFO and LIFO refer to two techniques for(1)with collection of items to which additions and(2)are to be made. The acronym FIFO(3)for first-in-first-out and LIFO represents last-in-first-out. Derived from business accounting and investing management(4), these techniques have found widespread application in computer science. For example, the LIFO technique has been used in the parsing techniques employed by compilers and in the(5)of data.

供选择的答案:

(1) producing (2) dealing (3) networking (4) searching

(5) deletions (6) locations (7) observations (8) notations

(9) stands (10) represents (11) finds (12) replaces

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第4题

选出应填入下面一段英语中______内的正确答案。 VRML is a (1) for 3D multimedia and shared virtual

选出应填入下面一段英语中______内的正确答案。

VRML is a(1)for 3D multimedia and shared virtual worlds on the WWW. In comparison to HTML, VRML adds the next level of interaction, structured graphics, and extra(2)(z and time) to the presentation of documents. The applications of VRML are(3), ranging from simple business graphics to entertaining WWW page graphics, manufacturing, scientific, entertainment, and educational applications, and 3D shared virtual worlds and communities.

X3D is the name under which the development of VRML is continued. X3D is based on XML and is backwards(4)with VRML. Furthermore, it is componentized, profiled, and extensible, which makes it possible to use X3D in very different(5), from high-end visualizations to lightweight applications.

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第5题

选出应填入下面一段英语中______内的正确答案。 Although the bulk ofindustry resources and energies hav

选出应填入下面一段英语中______内的正确答案。

Although the bulk ofindustry resources and energies have focused on developing the fastest(1)or slickest(2), more and more mindshare is turning to the evolution of the computer interface. Advancements in the areas ofinput device,(3)processing and virtual reality could lead to fundamental changes in the way human and computer interact. The technological battlefield of the future will be adding layers between the user and the raw machine to make the(4)as invisible as possible.(5)represents the next evolutionary step for the interface.

供选择的答案:

(1) voice (2) microprocessor (3) GUI (4) workstation

(5) application software (6) operating system

(7) interface (8) DBMS (9) virtual reality (10) eye-tracking device

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第6题

选出应填入下面一段英语中______内的正确答案。 With hundreds of rrullions of electronic (1) taking

选出应填入下面一段英语中______内的正确答案。

With hundreds of rrullions of electronic(1)taking place daily, businesses and organizations have a strong incentive to protect the(2)of the data exchanged in this manner, and to positively ensure the(3)of those involved in the transactions. This has led to an industry-wide quest for better, more secure methods for controlling IT operations, and for deploying strong security mechanisms deeply and broadly throughout networked infrastructures and client devices. One of the more successful concepts to engage the imaginations of the security community has been the development of standards-based security(4)that can be incorporated in the hardware design of client computers. The principle of encapsulating core security capabilities in(5)and integrating security provisions at the deepest levels of the machine operation has significant benefits for both users and those responsible for securing IT operations.

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第7题

选出应填入下面一段英语中______内的正确答案。 SOX is an alternative (1) for XML. It is useful for

选出应填入下面一段英语中______内的正确答案。

SOX is an alternative(1)for XML. It is useful for reading and creating XML content in a(2)editor. It is then easily transformed into proper XML. SOX was created because developers can spend a great deal of time with raw XML. For many of us, the popular XML(3)have not reached a point where their tree views, tables and forms can completely substitute for the underlying(4)language. This is not surprising when one considers that developers still use a text view, albeit enhanced, for editing other languages such as Java. SOX uses(5)to represent the structure of an XML document, which eliminates the need for closing tags and a number of quoting devices. The result is surprisingly clear.

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第8题

选出应填入下面一段英语中______内的正确答案。 Microsoft's COM is a software (1) that allows a

选出应填入下面一段英语中______内的正确答案。

Microsoft's COM is a software(1)that allows applications to be built from binary software components. COM is the underlying architecture that forms the foundation for higher-level software services, like those provided by OLE. COM defines a binary standard for function calling between components, a way for components to dynamically discover the interfaces implemented by other components, and a mechanism to identify components and their interfaces uniquely.

OLE is a compound(2)standard developed by Microsoft. OLE makes it possible to create(3)with one application and link or embed them in a second application. Embedded objects retain their original format and(4)to the application that created them. Support for OLE is built into the Windows and MacOS Operating Systems.A(5)compound document standard developed mainly by Apple and IBM is called OpenDoc.

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第9题

选出应填入下面一段英语中______内的正确答案。 Since the time of John von Neumann, the basic conceptua

选出应填入下面一段英语中______内的正确答案。

Since the time of John von Neumann, the basic conceptual model used to think about computers and programs has(1)unchanged, in(2)of many advances in both hardware and software technology. In the(3)that von Neumann proposed, the basic instruction cycle is for the processor to fetch the instruction pointed at by the program counter,(4)the program counter, and then execute the instruction. Because instructions are executed strictly sequentially, there is little inherent parallelism, and(5)opportunity to employ large numbers of processors to gain speed.

供选择的答案:

(1) small (2) big (3) add (4) little (5) model

(6) remained (7) style (8) increase (9) stead (10) spite

(11) already (12) period (13) formula (14) decrease (15) not

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第10题

选出应填入下面一段英语中______内的正确答案。 Most IP layer-based proxy mechanisms, such as network a

选出应填入下面一段英语中______内的正确答案。

Most IP layer-based proxy mechanisms, such as network address translation (NAT), only support unidirectional proxy, from the internal network to external network (the Internet). The proxy establishes the communication channel by(1)IP addresses. The IP addresses must be(2). These proxy mechanisms prevent applications that must establish return data channels from establishing their data channels, such as, multimedia applications. IP layer-based proxy mechanisms need additional software(3)for each application that uses.(4)channels. SOCKS identifies communication targets through domain names, overcoming the restriction of using private IP addresses. SOCKS can use domain names to establish communication between separate LANs,with(5)IP addresses.

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第11题

选出应填入下面一段英语中______内的正确答案。 Prior to the UML, there was no clear leading (1) la

选出应填入下面一段英语中______内的正确答案。

Prior to the UML, there was no clear leading(1)language. Users had to choose. from among many similar modeling languages with minor differences in overall(2)power. Most of the modeling languages shared a set of commonly accepted concepts that are expressed slightly differently in various languages. This lack of(3)discouraged new users from entering the OO market and from doing OO modeling, without greatly expanding the power of modeling. Users longed for the industry to it adopt one, or a very few, broadly supported modeling languages suitable for(4)usage.

Some vendors were discouraged from entering the OO modeling area because of the need to support many similar, but slightly different, modeling languages. In particular, the supply of add-on tools has been depressed because small vendors cannot afford to support many different formats from many different(5)modeling tools. It is important to the entire OO industry to encourage broadly based tools and vendors, as well as niche products that cater to the needs of specialized groups.

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