多項選擇題Which three methods would help prevent critical network-traffic packet loss on high speed serial interfaces?()

A.policy routing
B.increase link capacity
C.WRED
D.CBWFQ
E.LFI
F.WFQ


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1.多項選擇題Which two steps are executed in the deployment of Cisco AutoQoS for Enterprise?()

A.The customer uses SNMP statistics to create the policy.
B.QoS policy templates are generated and installed on the interface.
C.RTP is used to generate the policy.
D.LLQ,cRTP,and LFI are used to automatically discover the policy.
E.The auto-generated policy is manually optimized before implementation.
F.Auto-discovery is used to determine what traffic is on the interface.

2.多項選擇題What are three security problems with Wi-Fi Protected Access (WPA)?()

A.WPA is based on the outdated IEEE 802.11i standard.
B.WPA uses RSN,which uses the same base encryption algorithm as RC4.
C.WPA requires a hardware upgrade that may not be supported by all vendors.
D.WPA uses TKIP,which uses the same base encryption algorithm as WEP.
E.WPA is susceptible to a DoS attack when it receives two packets in quick succession with bad MICs,forcing the AP to shut down the entire Basic Service Set (BSS) for one minute.
F.WPA is susceptible to a security weakness when preshared keys are used.

4.多項選擇題Which three statements about end-to-end delay are true?()

A.End-to-end delay is the sum of propagation delays,processing delays,serialization delays,and queuing delays.
B.Coast-to-coast end-to-end delay over an optical link is about 20 ms.
C.Processing delay depends on various factors,which include CPU speed,CPU utilization,IP switching mode, and router architecture.
D.Propagation and serialization delays are related to the media.
E.Propagation delay is the time it takes to transmit a packet and is measured in bits-per-second (bps).
F.Serialization delay is the time it takes for a router to take the packet from an input interface and put it into the output queue of the output interface.

5.多項選擇題To have the best possible voice quality and to utilize effectively the available bandwidth, which queuing and compression mechanisms need to be used?()

A.class-based weighted fair queuing (CBWFQ)
B.low latency queuing (LLQ)
C.priority queuing (PQ) or custom queuing (CQ)
D.Real-Time Transport Protocol (RTP) header compression
E.TCP header compression
F.UDP header compression

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