单选题Based on the need to limit processing and bandwidth utilization due to dynamic routing protocol operation, the foll owing routing requirements have been specified for your network. - partial and incremental routing updates - only the devices affected b

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What are two steps to define a QoS policy？（）

• A、set a minimum bandwidth guarantee
• B、increase bandwidth
• C、determine a specific transfer rate
• D、establish timers
• E、configure CBWFQ for best-effort traffic
• F、set a maximum bandwidth limit

第4题：

What are two characteristics of the RED algorithm as implemented in JUNOS software?（）

• A、It profiles based on bandwidth.
• B、It profiles based on loss priority.
• C、It prevents traffic loss through buffering.
• D、It prevents global synchronization with tail drops.

第5题：

Spanning Tree Protocol calculates path cost based on which of these？ （）

• A、 interface bandwidth
• B、 interface delay
• C、 interface bandwidth and delay
• D、 hop count
• E、 bridge priority

第6题：

Why is an STM-1 2F-MS-SPRing NOT feasible？（）

• A、 An equal amount of working and protect bandwidth is required.
• B、 DCC bandwidth is not large enough to handle K1/K2 processing.
• C、 Switch times would exceed 50 ms for an STM-1 MS-SPRing ring.
• D、 There is not enough bandwidth in an STM-1 ring to justify MS-SPRing protection.

第7题：

What happens when you enable QoS bandwidth detection? （）(Choose two.)

• A、Circuit speed is reduced by 2% for overhead.
• B、WAN speed can be configured to the LAN speed.
• C、Bandwidth is adjusted based on minimum and maximum settings.
• D、WAN bandwidth is detected based on acknowledgement of metapackets.

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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

第15题：

What happens when you enable QoS bandwidth detection? （）(Choose two.)

• A、Circuit speed is reduced by 2% for overhead.
• B、WAN speed can be configured to the LAN speed.
• C、Bandwidth is adjusted based on minimum and maximum settings
• D、WAN bandwidth is detected based on acknowledgement of metapackets.

第16题：

You are working as an administrator at TestKing, and you need to set the bandwidth of your routers serial port to 56K. Which of the following commands would you use?（）

• A、Bandwidth 56000
• B、Bandwidth 56000000
• C、Bandwidth 56
• D、Bandwidth 56kbps

第17题：

Users at the Charleville Company began experiencing high network delays when Internet connectivity was enabled for all users. After investigating the traffic flow, you determine that peerto-peer traffic from a music download site is consuming a large amount of bandwidth. Which QoS mechanism can you implement to improve the network response time?（）

• A、Use CBWFQ to queue the peer-to-peer traffic into the default traffic class.
• B、Use class-based WRED to randomly drop the peer-to-peer traffic during network congestions.
• C、Use class-based policing to limit the peer-to-peer traffic rate.
• D、Use class-based shaping to delay any excessive peer-to-peer traffic. Answer: C

第18题：

You are building a Front Controller using a JSP page and you need to determine if the user’s session hasNOT been created yet and perform some special processing for this case. Which scriptlet code snippet willperform this test？（）

• A、<% if （ request.getSession（false） == null ） {// special processing} %>
• B、<% if （ request.getHttpSession（false） == null ） {// special processing} %>
• C、<% if （ requestObject.getSession（false） == null ） { // special processing} %>
• D、<% if （ requestObject.getHttpSession（false） == null ） { // special processing} %>

第19题：

our network contains a server that runs window server 2008. The serve has the network policy server(NPS) service role installed. You need to allow only members of a global group named group1 VPN access to the network. What should you do?（）

• A、Add group1 to the RAS and IAS servers group.
• B、Add group1 to the network configuration operators group..
• C、Create a new network policy and define a group-based connection for group1. Set the access permission of the policy to access granted. Set the processing order of the policy to 1.
• D、Create a new network policy and define a group-based condition for group1. Set the access permission of the policy to acces granted. Set the processing of the policy to 3.

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