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A company implements video conferencing over IP on their Ethernet LAN. The users notice that the network slows down, and the video either stutters or fails completely. What is the most likely reason for this?（）
A.minimum cell rate (MCR)
B.quality of service (QoS)
C.modulation
D.packet switching exchange (PSE)
E.reliable transport protocol (RTP)
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更多 “ A company implements video conferencing over IP on their Ethernet LAN. The users notice that the network slows down, and the video either stutters or fails completely. What is the most likely reason for this?（）A.minimum cell rate (MCR)B.quality of service (QoS)C.modulationD.packet switching exchange (PSE)E.reliable transport protocol (RTP) ” 相关考题
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单选题A project requires a new server to be set up with the ability to automatically fail over its Ethernet connection to a second connection if a network failure occurs. Which of the following provides greatest resiliency？（）A
Two switch ports will be needed on a switch,two Ethernet cables will be needed for theserver each connecting to two different Ethernet cards,and one IP address will be neededB
Two switch ports will be needed on two different switches two Ethernet cables will beneeded for the server each connecting to two different Ethernet cards,and one IP address will be neededC
Two switch ports will be needed on two different switches,two Ethernet cables will be needed for the server each connecting to two different Ethernet cards,two different IP addresses will be neededD
One switch port will be needed on one switch,a splitter will be needed to split the connection,two Ethernet cables will be needed for the server each connecting to two different Ethernet cards,and two different IP addresses will be needed
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单选题While using a packet analyzer， you notice four additional bytes being added to the packets in the Company network. Which protocol inserts a four byte tag into the Ethernet frame and recalculates CRC value？ （）A
DTPB
VTPC
802.1QD
ISLE
None of the other alternatives apply
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单选题Your company has 250 client computers connected to the office LAN. The company has a pool of five public IP addresses. All client computers have dynamically assigned IP addresses. You need to provide all client computers with Internet access. What should you use？（）A
DHCP Relay AgentB
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单选题A company implements video conferencing over IP on their Ethernet LAN. The users notice that the network slows down, and the video either stutters or fails completely. What is the most likely reason for this?（）A
minimum cell rate (MCR)B
quality of service (QoS)C
modulationD
packet switching exchange (PSE)E
reliable transport protocol (RTP)
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单选题A users Junos Pulse client uses 802.1X to access a wired network and is failing to authenticate. You run a packet capture from the users PC and notice that immediately after the client machine sends an EAPoL-start packet, an EAP-failure packet is returned. You review the RADIUS troubleshooting logs on the MAG Series device and do not see any authentication attempts from the user. Other users on the same Ethernet switch are successfully authenticating. Which device is sending the EAP-failure packet to the workstation?（）A
The RADIUS serverB
The EAPoL serverC
The workstation's network adapterD
The Ethernet switch
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单选题A metro Ethernet user is connected using a PPP over Ethernet service.How many Layer 2 headers are attached to each IP datagram?（）A
1B
2C
3D
4
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多选题An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location？ （）AThe switch must be configured with an IP address,subnet mask,and default gateway.BThe switch must be connected to a router over a VLAN trunk.CThe switch must be reachable through a port connected to its management VLAN.DThe switch console port must be connected to the Ethernet LAN.EThe switch management VLAN must be created and have a membership of at least one switch port.FThe switch must be fully configured as an SNMP agent.
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多选题An administrator would like to configure a switch over a virtual terminal connection from locations outside of the local LAN. Which of the following are required in order for the switch to be configured from a remote location? （）AThe switch must be configured with an IP address, subnet mask, and default gateway.BThe switch must be connected to a router over a VLAN trunk.CThe switch must be reachable through a port connected to its management VLAN.DThe switch console port must be connected to the Ethernet LAN.EThe switch management VLAN must be created and have a membership of at least one switch
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单选题You are the administrator of 15 Windows XP Professional portable computers in the sales department of your ompany. The company network uses DHCP to configure the IP addresses of the portable computers when the computers are used in the office. Company policy allows the company portable computers to be connected to users' home networks. The sales department reports that users who use home networks that have manually configured IP addresses are unable to connect the portable computers to their home networks. You want to ensure that users can connect portable computers to their home networks when they are at home and to the company network when they are in the office. You do not want to change the configuration of home computers on users' home networks. You do not want to change the administrative privileges of the sales department users. What should you do?（）A
Configure the network adapters of the portable computers to enable Internet Connection Sharing (ICS). B
Configure the network adapters of the portable computers to enable Automatic Private IP Addressing (APIPA).C
Add a script to the users' desktops that changes the IP configuration between dynamic and manual.D
Configure the IP properties of the portable computers so that they have an alternate configuration.
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单选题Telepresence and video conferencing have been an increasingly important component of the overall collaboration marker, which indicator is the best measure of the continued importance of these technologies going forward?（）A
generation Y ,raised on video, comprises 17 percent of the world populationB
the annual growth rate of the video-conferencing market is 23 percentC
the U.S internet traffic annual growth rate is more than 40 percentD
thecisco long-term growth-rate target is 12 percent to 17 percent
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