Which QoS requirement applies to streaming video traffic?（）

A .  In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit. B .  In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field C .  In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values. D .  The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet. E .  The 802.10 standard uses a three bitfield referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.

A .  The SDM QoS wizard will create two real-time traffic classes to handle VoIP and voice signaling packets. B .  The SDM QoS wizard will create three real-time traffic classes to handle VoIP， voice signaling， and video packets. C .  The SDM QoS wizard will create four real-time traffic classes to handle VoIP， voice signaling， video， and video streaming packets. D .  The SDM QoS wizard will create two business-critical traffic classes to handle transactional and network management packets. E .  The SDM QoS wizard will create three business-critical traffic classes to handle transactional， network management， and routing packets. F .  The SDM QoS wizard will create four business-critical traffic classes to handle transactional， network management， routing， and best-effort packets.

A .  Business-critical traffic includes VoIP and voice signaling packets. B .  SDM can be used to configure a basic QoS policy for incoming traffic on WAN interfaces and IPsec tunnels. C .  SDM can provide QoS for real-time traffic and business-critical traffic. D .  SDM creates a custom-queuing （CQ） or a priority-queuing （PQ） policy. E .  SDM creates a low latency queuing （LLQ） service policy with its associated classes. F .  When allocating bandwidth， values can be entered in either bandwidth percentage or kilobytes per second （kBps）.

A .  In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit. B .  In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field. C .  In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values. D .  The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet. E .  The 802.1Q standard uses a three bit field referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.

A . Voice traffic should be marked to DSCP EF per the QoS baseline and RFC3246. B . Voice traffic loss should be no more than 3%. C . One-way latency （mouth-to-ear） should be less than 150 msec. D . Average one way jitter should be targeted to less than 30 msec. E . 21-320 Kbps of guaranteed priority bandwidth is required per call depending on sample rate，codec，and layer 2 overhead.

A . the best-effort class will need to have its percentage entered in the QoS Policy Generation screen B . SDM QoS wizard provides real-time validation of application usage of WAN bandwidth C . the SDM wizard is not able to monitor QoS policing traffic D . the SDM QoS wizard is pre-installed on enterprise router

A . a drawback of implementing RSVP is the requirement to migrate to a supporting routing protocol B . RSVP uses DSCP to signal QoS requirements to routers  C . RSVP is a routing protocol D . RSVP is an IP protocol that uses IP protocol ID 46， and TCP/UDP ports 3455 E . RSVP specifically provides a level of service for rate-sensitive and delay-sensitive traffic F . the flow-based approach of RSVP is ideal for large， scalable implementations such as the public internet

A . the SDM QoS wizard will create two real-time traffic classes to handle VoIP， voice signaling， and video packets B . the SDM QoS wizard will create three real-time traffic classes to handle VoIP， voice signaling， video， and video packets C . the SDM QoS wizard will create four real-time traffic classes to handle VoIP， voice signaling， video， and video streaming packets D . the SDM QoS wizard will create two business-critical traffic classes to handle transactional and  network management packets E . the SDM QoS wizard will create three business-critical traffic classes to handle transactional， network management， and routing packets F . the SDM QoS wizard will create four business-critical traffic classes to handle transactional， network management， routing， and best-effort packet

A .  Implementing DiffServ involves the configuration of RSVP. B .  Implementing IntServ allows QoS to be performed by configuring only the ingress and egress devices. C .  Implementing IntServ involves the utilization of RSVP. D .  Traffic should be classified and marked by the core network devices. E .  Traffic should be classified and marked as close to the edge of the network as possible.

A . best-effort delivery B . ingress committed rate （ICR） C . shaping and policing D . egress committed rate （ECR） E . Integrated Services （IntServ） F . differentiated services （DiffServ）

A . DiffServ requires RSVP to set up a path through the network to accommodate the requested QoS. B . Network traffic is identified by class， and the level of service is chosen for each class. C . The DiffServ model relies on a fairly simple mechanism to provide QoS over a wide range of equipment. D . RSVP enables the DiffServ model to provide end-to-end QoS. E . The DiffServ model is more scalable than the IntServ model. F . The flow-based approach of the DiffServ model is ideal for large scalable implementations such as the public Internet.

A .  DiffServ B .  IntServ C .  RSVP D .  WFQ

A .  The DiffServ model requires applications to signal the network with QoS requirements. B .  The DiffServ model can be used to deliver QoS based upon IP precedence， or source and destination addresses. C .  The DiffServ model requires RSVP. D .  The best effort model is suitable for applications such as file transfer and e-mail E .  The IntServ model requires applications to signal the network with QoS requirements. F .  The IntServ model attempts to deliver a level of service based on the QoS specified by each packet

A . Committing a transaction B . Flashing back a transaction C . Recovering a failed transaction D . Running a read-consistent query E . Changing a tablespace status from READ ONLY to READ WRITE

A .  Enhanced Image B .  StandardImag C .  Cisco IOS software D .  Enhanced Multilayer Software Image

A . Implementing DiffServ involves the configuration of RSVP. B . Implementing IntServ allows QoS to be performed by configuring only the ingress and egress devices. C . Implementing IntServ involves the utilization of RSVP. D . Traffic should be classified and marked by the core network devices. E . Traffic should be classified and marked as close to the edge of the network as possible.

A . The 802.11e standard is the IEEE 802.11 OoS WLAN standard. B . The Wi-Fi Multimedia （WMM） standard decreases the eight priority levels to four access categories. C . The Wi-Fi Multimedia （WMM） standard is a Wi-Fi Alliance standard that increases the four priority levels to eight access categories. D . The Wi-Fi Multimedia （WMM） standard is an IEEE standard that increases the four priority levels to eight access categories. E . Wireless 802.11 deploys Distributed Coordination Function （DCF）， carrier sense multiple access with collision detection （CSMA/CD）， interframe spacing， and random wait timers to avoid collisions. F . Wireless OoS designs and implementations commonly use Layer 3 differentiated services code point （DSCP） or Layer 2 802.1 p to ensure priority

A .  one-way latency of 150 ms to 200 ms B .  jitter of 30 ms or less C .  packet loss of 2 percent or less D .  150bps of overhead bandwidth

A . VPN traffic needs to be classified based on the Layer2 header information B . VPN traffic needs to be classified based on the IP precedence or DSCP C . VPN traffic needs to be classified based on IP flow or Layer 3 information， such as source and destination IP address D . VPN traffic with Authentication Header （AH） needs to preserve the ToS byte

A . Business-critical traffic includes VoIP and voice signaling packets. B . SDM can be used to configure a basic QoS policy for incoming traffic on WAN interfaces and IPsec tunnels. C . SDM can provide QoS for real-time traffic and business-critical traffic. D . SDM creates a custom-queuing （CQ） or a priority-queuing （PQ） policy. E . SDM creates a low latency queuing （LLQ） service policy with its associated classes. F . When allocating bandwidth， values can be entered in either bandwidth percentage or kilobytes per second （kBps）.

A. better B. well C. best D. good

A．well B．better C．best

While Microsoft, which stole a move out of the Apple playbook, won cheers from high-end, creative-class consumers like business analysts, media designers and music producers. Microsoft launched several new products, but the big one was the Surface Studio--a 28-inch, extremely-high-resolution(分辨率) touchscreen tablet that doubles as a desktop PC screen. There’s also the Surface Dial, which can be placed on the Studio’s screen and revolved(旋转) to select menu items. As Hayley Tsukayama remarked at The Washington Post, the Studio is really just a super-sized version of the Surface Books product that Microsoft has been selling for years. But if you’ve ever watched science fiction movies like Minority Report--where Tom Cruise seems to operate pictures and data hanging in mid-air by touching them, spreading their fingers to increase on details, and seeding files and information sliding from one folder(文件夹) to another with a click of the fingers, you can see how Microsoft is trying to show the same experience. Meanwhile, Apple’s new products were almost like some fine promotions for its Apple TV. They boast(自夸) that the new MacBook Pros has a smaller size and more functions, and a new touchscreen bar on laptop keyboards where function keys used to be. So what’s going on？ In many ways, Apple is focusing on attracting the average consumers who have been attracted by Microsoft. And Microsoft is focusing on targeting the high-end professionals Apple has historically been associated with. You can even see this in the companies’ ad campaigns: Microsoft’s ads stress imagination and creativity, while Apple’s commercial chief designer Jony Ive, in calm and professional British accent, explained Apple has improved the performance and convenience of its MacBooks. So Apple is trying to control the world of devices and laptops from the top down, starting with the high-end market and moving on to appeal to a broader base of consumers. Microsoft, having already strengthened itself within the bigger low-end market, is now attempting the opposite with a bottom-up strategy. Will these succeed？ Time will tell… What can we learn from the first paragraph？ A.Microsoft’s new products made a big hit B.Apple’s products aim at high-end consumers C.Apple and Microsoft developed the same products D.The design of Microsoft’s products is original and unique Why does the author mention the science fiction movie in Paragraph 3？A.To tell us Microsoft’s new products can be used in movies B.To show how trendy Microsoft’s new products are C.To show Microsoft’s new products are inspired by the movie D.To advocate more people to see the science fiction movie What is Paragraph 4 mainly about？ A.The features of Apple’s new products B.The bright future of Apple’s new products C.The reason why Apple designed the new products D.The difference between Apple’s new products and Apple TV What can we learn about the two companies in promotion？A.They push forward high tech development B.They lead the development of IT industry C.They adopt different business strategies D.They astonish the world from time to time

A、lick the boot B、grease the hand C、paint the apple D、clean the hand