Choose the term described by the sentence: Expert knowledge or skill, esp. in a particular field; know－how（).

A . The sequence of events that produce a power pulse B . One rotation of the engine crankshaft C . One stroke of a piston D . All of the above

A . A CSU/DSU terminates a digital local loop. B . A modem terminates a digital local loop. C . A CSU/DSU terminates an analog local loop. D . A modem terminates an analog local loop. E . A router is commonly considered a DTE device. F . A router is commonly considered a DCE device.

A . It is locally significant. B . It is globally significant. C . It is needed to identify a unique instance of an OSPF database. D . It is an optional parameter required only if multiple OSPF processes are running on the router. E . All routers in the same OSPF area must have the same process ID if they are to exchange routing information.

A . eliminates dependence of middleware layer  B . provides the ability to partition the library  C . makes tape look and work like any removable media  D . provides up to 48% lower power consumption in idle mode

A . includes three design levels B . incorporates products and technologies into enterprise, service provider, and commercial systems C . extends the value of designs through a sustained development plan D . does not factor customer input design process E . facilitates faster and more reliable customer deployments F . incorporates a narrow range of technologies and product

A . addresses chosen by a company to communicate with the Internet B . addresses that cannot be routed through the public Internet C . addresses that can be routed through the public Internet D . a scheme to conserve public addresses E . addresses licensed to enterprises or ISPs by an Internet registry organizatio

A . The port must be put into forwarding state manually after root-inconsistent state has beencorrected B . A Root Guard port receiving superior BPDU goes into a root-inconsistent state C . A Root Guard port receiving inferior BPDU goes into a root-inconsistent state D . While the port is in a root-inconsistent state no user data is sent across that port E . The port returns to a forwarding state if inferior BPDUs stop F . It should be applied to all switch port

A . A BPDU Guard port should only be configured on ports with PortFast enabled B . BPDU Guard and PortFast should not be enabled on the same port. C . BPDU Guard is used to ensure that superior BPDUs are not received on a switch port D . A BPDU Guard port receiving a BPDU will go into err-disable state E . A BPDU Guard port receiving a BPDU will be disabled F . BPDU Guard can be enabled on any switch port

A .  offers a feature-rich implementation alternative to Wi-Fi certification B .  accelerates the availability of innovative features while maintaining interoperability C .  provides innovative features only on Cisco’s wireless client adapters D .  provides an evolving set of specifications for interoperability E .  eliminates the need for testing by providing innovative features to wireless client vendors through a one-time license fee

A . RIP version 1 broadcasts updates whereas RIP version 2 uses multicasts. B . RIP version 1 multicasts updates while RIP version 2 uses broadcasts. C . Both RIP version 1 and RIP version 2 are classless routing protocols. D . RIP Version 2 is a classless routing protocol whereas RIP version 1 is a classful routing protocol. E . Both RIP version 1 and version 2 support authentication. F . RIP version 2 sends the subnet mask in updates and RIP version 1 does not.

A . A CSU/DSU terminates a digital local loop. B . A modem terminates a digital local loop. C . A CSU/DSU terminates an analog local loop. D . A modem terminates an analog local loop. E . A router is commonly considered a DTE device. F . A router is commonly considered a DCE device.

A.franchise B.non-tariff barrier C.expertise D.return

A．sensation B．sensory activation C．perception D．transduction

A．IGP B．BGP C．EGP D．Incomplete E．Anonymous