对革兰阳性菌、革兰阴性菌、厌氧菌均有强大抗菌活性的药物是A．B．C．D．E．

The diffserv approach to providing QoS in networks employs a small, well-defined set of building blocks from which you can build a variety of(). Its aim is to define the differentiated services (DS) byte, the Type of Service (ToS) byte from the Internet Protocol Version 4 ()and the Traffic Class byte from IP Version 6, and mark the standardized DS byte of the packet such that it receives a particular forwarding treatment, or per-hop behavior (PHB), at each network node. The diffserv architecture provides a()within which service providers can offer customers a range of network services, each differentiated based on performance. A customer can choose the ()level needed on a packet-by-packet basis by simply marking the packet&39;s Differentiated Services Code Point (DSCP) field to a specific value.This () specifies the PHB given to the packet within the service provider network.

A.servicesB.UsersC.networksD.structuresA.messageB.PacketC.headerD.packageA.informationB.StructureC.meansD.frameworkA.performanceB.SecureC.privacyD.dataA. packetB.valueC.serviceD.paragraph

eNodeB通过将业务QoS参数映射为()实现传输的DiffServ模型。

A．DiffServ是一种端到端基于流的QoS技术

B．DiffServ不需要信令，逐跳转发，即在一个业务发出报文前，不需要通知路由器

C．DiffServ是基于DSCP的QoS解决方案

D．在网络入口处根据服务要求对业务进行分类、流量控制，同时设置报文的DSCP域

A．DiffServ

B．IntServ

C．DiffServ和IntServ并重

D．IntServ为主，同时也使用DiffServ

A．MPLS

B．RSVP

C．DiffServ

D．intserv

A．错误

B．正确

A．ATM

B．MPLS

C．SDH

D．Ad Hoc

A．ATM

B．MPLS

C．SDH

D．Adhoc

A．DiffServ最主要的优势是弱化了对信令的依赖

B．DiffServ提供全网端到端的QoS保证

C．DiffServ将QoS的一致性范围缩小到每个区域之中，从而降低了这种模型实现的复杂性

D．DiffServ无需像IntServ在每个路由器上为每个业务流保留"软状态"，避免了大量的资源预留信息的传递，具有更好的可扩展性