单项选择题 SOCKS is a genetic proxy protocol for TCP/IP-based networking, applications. SOCKS includes two 1 , the SOCKS server and the SOCKS client. The SOCKS server is implemented at the application layer. The SOCKS client is implemented between applications and the 2 layer. When an application client needs to connect to an application server, the client connects to a SOCKS proxy server. The proxy server connects to the application server instead of the client, and 3 data between the client and the application server. For the application server, the proxy server is the 4 . SOCKS is also one of the popular 5 to network firewalls. Because of its simplicity and flexibility, SOCKS has been used as genetic application proxy in virtual private network (VPN), and for extranet applications.
1.
A.elements
B.components
C.services
D.clients
A B C D
B
2.
A.transport
B.transmission
C.network
D.datalink
A B C D
A
3.
A.relays
B.replaces
C.replays
D.repeals
A B C D
A
4.
A.workstation
B.user
C.customer
D.client
A B C D
D
5.
A.methods
B.alternatives
C.choices
D.replacements
A B C D
B
Networks can be interconnected by different devices. In the physical layer, networks can be connected by 6 or hubs, which just move the bits from one network to an identical network. One layer up we find bridges and switches, which operate at data link layer. They can accept 7 , examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two networks. If two networks have 8 network layer, the router may be able to translate between the packet formats. In the transport layer we find transport gateway, which can interface between two transport connections. Finally, in the application layer, application gateways translate message 9 . As an example, gateways between Internet E-mail and X.400 E-mail must 10 the E-mail message and change various header fields.
6.
A.reapers
B.relays
C.connectors
D.modems
A B C D
A
7.
A.frames
B.packets
C.packages
D.cells
A B C D
A
8.
A.special
B.dependent
C.similar
D.dissimilar
A B C D
D
9.
A.syntax
B.semantics
C.language
D.format
A B C D
B
10.
A.analyze
B.parse
C.delete
D.create
A B C D
B
Object-oriented analysis (OOA) is a semiformal specification technique for the object-oriented paradigm. Object-oriented analysis consists of three steps. The first step is 11 . It determines how the various results are computed by the product and presents this information in the form of a 12 and associated scenarios. The second is 13 , which determines the classes and their attributes, then determines the interrelationships and interaction among the classes. The last step is 14 , which determines the actions performed by or to each class or subclass and presents this information in the form of 15
11.
A.use-case modeling
B.class modeling
C.dynamic modeling
D.behavioral modeling
A B C D
A
12.
A.collaboration diagram
B.sequence diagram
C.use-case diagram
D.activity diagram
A B C D
C
13.
A.use-case modeling
B.class modeling
C.dynamic modeling
D.behavioral modeling
A B C D
B
14.
A.use-case modeling
B.class modeling
C.dynamic modeling
D.behavioral modeling
A B C D
C
15.
A.activity diagram
B.component diagram
C.sequence diagram
D.state diagram
A B C D
D
A typical 16 language contains an applicative sub-language which approximates the mathematical abstractions of "timeless" functions applied to "spaceless' values, where the actual operation sequences and use of storage space during expression evaluation are organized behind the 17 . In this setting, values are data structures of low volume, typically a few computer words or less, which means that an illusion of spacelessness can be realized by having 18 results during expression evaluation stored at the discretion of the language implementation, and effecting parameter 19 and 20 operations through value copying.
16.
A.imperative
B.mandatory
C.compulsory
D.voluntary
A B C D
A
17.
A.foreground
B.background
C.screen
D.scenes
A B C D
D
18.
A.middle
B.intermediate
C.previous
D.final
A B C D
B
19.
A.transverse
B.transportation
C.transmission
D.translation
A B C D
C
20.
A.assignment
B.design
C.value
D.dispatch
A B C D
A
Originally introduced by Netscape Communications, 21 are a general mechanism which HTTP Server side applications, such as CGI 22 , can use to both store and retrieve information on the HTTP 23 side of the connection. Basically, Cookies can be used to compensate for the 24 nature of HTTP. The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based 25
21.
A.Browsers
B.Cookies
C.Connections
D.Scripts
A B C D
B
22.
A.graphics
B.processes
C.scripts
D.texts
A B C D
C
23.
A.Client
B.Editor
C.Creator
D.Server
A B C D
A
24.
A.fixed
B.flexible
C.stable
D.stateless
A B C D
D
25.
A.programs
B.applications
C.frameworks
D.constrains
A B C D
B
Traditional structured analysis techniques focus upon the flow of 26 within a system. Object-oriented analysis emphasizes the building of real-world models. It examines requirements from the perspective of the classes and objects found in the vocabulary of the 27 domain. Traditional system design method emphasizes the proper and effective structure of a complex system. Object-oriented design method encompasses the process of object-oriented decomposition and a 28 for depicting both logical and physical as well as static and dynamic models of the system under design. Object-oriented programming is a method of implementation in which programs are organized as cooperative collections of objects, each of which represents an 29 of some class, and whose classes are all members of a hierarchy of classes united via 30 relationships.
26.
A.instance
B.example
C.existence
D.implementation
A B C D
A
27.
A.control
B.program
C.data
D.reference
A B C D
C
28.
A.problem
B.solution
C.data
D.program
A B C D
A
29.
A.mark
B.picture
C.symbol
D.notation
A B C D
D
30.
A.control
B.inheritance
C.inference
D.connection
A B C D
B
MIMD systems can be classified into 31 -oriented systems, high-availability systems and response-oriented systems. The goal of 31 -oriented multiprocessing is to obtain high 31 34 minimal computing cost. The techniques employed by multiprocessor operating systems to achieve this goal take advantage of an inherent processing versus input/output balance in the workload to produce 35 and 36 loading of system 37
31.
A.though
B.through
C.throughout
D.throughput
A B C D
D
32.
A.at
B.of
C.on
D.to
A B C D
A
33.
A.balance
B.balanced
C.balances
D.balancing
A B C D
B
34.
A.uniform
B.unique
C.unit
D.united
A B C D
A
35.
A.resource
B.resources
C.source
D.sources
A B C D
B
Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an 36 from a friend who asks you to open it. This is what happens with Melissa and several other similar Email 37 . Upon running, such worms usually proceed to send themselves out to Email addresses from the victim's address book, previous Emails, Web pages 38 As administrators seek to block dangerous Email attachments through the recognition of well-known 39 , virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users. Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the 40 access to your network.
36.
A.attachment
B.packet
C.datagram
D.message
A B C D
A
37.
A.virtual
B.virus
C.worms
D.bacteria
A B C D
C
38.
A.memory
B.caches
C.ports
D.registers
A B C D
B
39.
A.names
B.cookies
C.software
D.extensions
A B C D
D
40.
A.cracker
B.user
C.customer
D.client
A B C D
A
WebSQL is a SQL-like 41 language for extracting information from the web. Its capabilities for performing navigation of web 42 make it a useful tool for automating several web-related tasks that require the systematic processing of either ail the finks in a 43 , all the pages that can be reached from a given URL through 44 that match a pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common 45 Interface.
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