题目
●The (75)is designed specifically as a security system for preventing unauthorized communications between one computer network and another computer network.
(75)A.firewall
B.protocol
C.hacker
D.virus
第1题
● (75) are designed to manage large bodies of information.
(75)
A. I/O ports
B. Printers
C. Database system
D. Keyboards
第2题
OSPF is a link-state routing protocol。It is designed to be run internal to a single __(71__system。Each OSPF router maintains an identical __(72)__ describing the autonomous system’s topology。From this database,a routing table is calculated by constructing a shortest-path __(73)__。OSPF recalculates routes quickly in the face of topological changes,utilizing a minimum of routing __(74)__ traffic。OSPF provides support for equal-cost multipath。An area routing capability is provided,enabling an additional level of routing protection and a reduction in routing protocol __(75)__。
A.autonomous
B.network
C.computer
D.server
第3题
Originally, the World-Wide Web was designed as information medium for(71) research teams. A deliberately simple implementation model was chosen to make it as simple as possible for authors to(72) documents to the web, and to(73)these in the sense of updating content. This implementation model is centered around the notion of resources, usually file-based. For the (74)intended use of the web, resources presented a useful abstraction, as they related to relatively self-contained chunks of information such as research publications and (75) pages. Such chunks of information typically could be set up and maintained independently of other resources, so that resources were the appropriate abstraction for composition and modification.
A.all
B.world
C.distributed
D.internet
第4题
71
A.autonomous
B.network
C.computer
D.server
第5题
A.buffer
B.modem
C.computer
D.server
第6题
● Traditional Internet access methods like dial-up were so slow that host computers were connected to the dial-up (71) at the customer premise over slow (72) ports. PPP was designed to run directly over these serial links. But with the advent of broadband Internet (73) technologies such as ADSL and cable modems there has been a considerable increase in the bandwidth delivered to the end users. This means that the host computers at the customer premise connect to the (74) or cable "modem" over a much faster medium such as Ethernet. It also means that multiple (75) can connect to the Internet through the same connection.
第7题
(71)A. hardware B. business C. software D. external
(72)A. driver B. application C. kernel D. boot loader
(73)A. data B. storage C. bus D. CPU
(74)A. time B. format C. controller D. packet
(75)A. JAFFS B. format C. file systems D. protocol
第8题
Most of today's internet uses IPv4, which is now more than twenty years old. IPv4 has been(72) resilient in spite of its age, but it is beginning to have problems. Most importantly, there is a growing(73) of IPv4 addresses, which are needed by all new machines added to the Internet. IPv6 fixes a number of problems in IPv4, such as the(74) number of available IPv4 addresses. It also adds many improvements to IPv4 in areas such as routing and network autoconfiguration. IPv6 is expected to gradually replace IPv4, with the two coexisting for a number of years during a transition(75) .
A.substitution
B.swap
C.switchover
D.replace
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