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单选题
VOIP is being implemented on the Company network. In a properly designed network， what is the maximum amount of time a voice package should spend crossing a network？ （）
A
90 milliseconds
B
120 milliseconds
C
150 milliseconds
D
240 milliseconds
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考题
VOIP is being implemented on the Company network. In a properly designed network， what is the maximum amount of time a voice package should spend crossing a network？ （）A、90 millisecondsB、120 millisecondsC、150 millisecondsD、240 milliseconds
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LDAP is being utilized throughout the Company Wireless network. Which issue or set of issues does the Lightweight Access Point Protocol （LWAPP） address？ （）A、 Reduction of processing in wireless controllersB、 Distributed approach to authentication， encryption， and policy enforcementC、 Access point discovery， information exchange， and configurationD、 Provides security by blocking communication between access points and wireless clientsE、 None of the other alternatives apply.
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Jitter is causing problems with the VOIP application in the Company network. What causes network jitter？（）A、Variable queue delaysB、Packet dropsC、Transmitting too many small packetsD、Compression
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VOIP is being implemented in the network and you need to assess the need for QoS. Which of thefollowing network problems would indicate a need to implement QoS features？（）A、Mis-routed packetsB、Excess jitterC、Delay of critical trafficD、Packet loss due to congestionE、Data link layer broadcast stormsF、FTP connections unsuccessful
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VOIP is being implemented in the Company network and you need to assess the need for QoS. Which of the following network problems would indicate a need to implement QoS features？（）A、Mis-routed packets B、Excess jitterC、Delay of critical trafficD、Packet loss due to congestionE、Data link layer broadcast stormsF、FTP connections unsuccessful
考题
VOIP has been implemented at the main office of the Company network. Which two statements are true about voice packets in a LAN？（）A、 Voice carrier stream utilizes Real-Time Transport Protocol (RTP) to carry the audio/media portion of the VoIP communication. B、 Voice traffic data flow involves large volumes of large packets. C、 Because a packet loss involves a small amount of data, voice traffic is less affected by packet losses than traditional data traffic is. D、 Voice packets are encapsulated in TCP segments to allow for proper sequencing during delivery. E、 Voice packets are very sensitive to delay and jitter.
考题
An expanding company is deploying leased lines between its main site and two remote sites. The bandwidth of the leased lines is 128kb/s each， terminated on different serial interfaces on the main router. These links are used for combined VOIP and data traffic. The network administrator has implemented a VOIP solution to reduce costs， and has therefore reserved sufficient bandwidth in a low latency queue on each interface for the VOIP traffic. Users now complain about bad voice quality although no drops are observed in the low latency queue.What action will likely fix this problem？（）A、mark VOIP traffic with IP precedence 6 and configure only ’fair-queue’ on the linksB、configure the scheduler allocate 3000 1000 command to allow the QoS code to have enough CPU cyclesC、enable class-based traffic shaping on the VoIP traffic classD、enable Layer 2 fragmentation and interleaving on the linksE、enable Frame Relay on the links and send voice and data on different Frame Relay PVCs
考题
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
考题
You need to configure a new Cisco router to be installed in the Company VOIP network. Which three interface commands will configure the switch port to support a connected Cisco phone and to trust the CoS values received on the port if CDP discovers that a Cisco phone is attached？ （）A、switchport voice vlan vlan-idB、mls qos trust device cisco-phoneC、switchport priority extend cos_valueD、mls qos trust cosE、mls qos trust override cos
考题
A user connecting a laptop to a wall jack is prompted for user credentials before being grantedaccess to the network. Which of the following is MOST likely implemented on the switch?（）A、MAC filteringB、PoEC、IP filteringD、802.1X
考题
单选题A company wants to secure access to its internal wireless network. The company wants to use themost secure means to access the network. Which of the following is the BEST choice for wireless security in this situation?（）A
WEP encryptionB
Channel rotationC
Disable SSIDD
WPA encryption
考题
单选题A user connecting a laptop to a wall jack is prompted for user credentials before being grantedaccess to the network. Which of the following is MOST likely implemented on the switch?（）A
MAC filteringB
PoEC
IP filteringD
802.1X
考题
单选题Jitter is causing problems with the VOIP application in the network. What causes network jitter？（）A
Variable queue delaysB
Packet dropsC
Transmitting too many small packetsD
Compression
考题
多选题Inter-VLAN routing has been implemented in the Company network. In VLAN routing， what are some of the disadvantages of designing a router-on-stick configuration？ （）AInterVLAN routing cannot be filtered by the router.BThe router becomes a single point of failure for the network.CRouters will not route STP BPDUs.DThere is a possibility of inadequate bandwidth for each VLAN.EAdditional overhead on the router can occur.FNetFlow Switching is required for InterVLAN accounting.
考题
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
考题
多选题VOIP is being implemented in the Company network and you need to assess the need for QoS. Which of the following network problems would indicate a need to implement QoS features？（）AMis-routed packetsBExcess jitterCDelay of critical trafficDPacket loss due to congestionEData link layer broadcast stormsFFTP connections unsuccessful
考题
多选题VOIP has been implemented at the main office of the Company network. Which two statements are true about voice packets in a LAN？（）AVoice carrier stream utilizes Real-Time Transport Protocol (RTP) to carry the audio/media portion of the VoIP communication.BVoice traffic data flow involves large volumes of large packets.CBecause a packet loss involves a small amount of data, voice traffic is less affected by packet losses than traditional data traffic is.DVoice packets are encapsulated in TCP segments to allow for proper sequencing during delivery.EVoice packets are very sensitive to delay and jitter.
考题
多选题The Cisco AutoQoS feature is being used throughout the Company VOIP network. Which three statements about this feature are true？（）AThe mls qos global configuration command must be entered before configuring AutoQoS.BCEF must be enabled.CThe no auto qos voip command is used to disable Cisco AutoQos and revoke all configurations generated by Cisco AutoQos.DCDP must be enabled.ESNMP must be enabled.
考题
多选题You need to configure a new Cisco router to be installed in the Company VOIP network. Which three interface commands will configure the switch port to support a connected Cisco phone and to trust the CoS values received on the port if CDP discovers that a Cisco phone is attached？ （）Aswitchport voice vlan vlan-idBmls qos trust device cisco-phoneCswitchport priority extend cos_valueDmls qos trust cosEmls qos trust override cos
考题
多选题VOIP is being implemented in the network and you need to assess the need for QoS. Which of thefollowing network problems would indicate a need to implement QoS features？（）AMis-routed packetsBExcess jitterCDelay of critical trafficDPacket loss due to congestionEData link layer broadcast stormsFFTP connections unsuccessful
考题
单选题Static VLANs are being used on the Company network. What is true about static VLANs？（）A
Devices use DHCP to request their VLAN.B
Attached devices are unaware of any VLANs.C
Devices are assigned to VLANs based on their MAC addresses.D
Devices are in the same VLAN regardless of which port they attach to.
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