问答题What field in IP packet is used for classification by QOS？
问答题
What field in IP packet is used for classification by QOS？
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相关考题：
What are two characteristics of multi－field classification?() A. implemented with firewall filtersB. typically configured on core routersC. typcially configured on customer facing routersD. implemented with Behavior Aggregate (BA) classification
What does qos pre-classify provides inregardto implementing QoS over GRE/IPSec VPN tunnels？（）A、 enables IOS to copy the ToS field from the inner （original） IPheader to theouter tunnel IP headerB、 enables IOS to make a copy of the inner （original） IP header and to run a QoS classification before encryption， based on fields in the inner IP header.C、 enables IOS to classify packets based on the ToS field in the inner （original） IP headerD、 enables IOS to classify packets based on the ToS field in the outer tunnel IP headerE、 enables the IOS classification engine to only see a single encrypted and tunneledflow to reduce classification complexity
Which two QoS classification and marking statements are true？ （）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.
What are three traffic descriptors that are used by the classification process to categorize packets that require special OoS handling？（）A、Resource Reservation Protocol （RSVP）B、IP precedenceC、traffic shapingD、trust boundariesE、DSCPF、application
Which two QoS classification and marking statements are true？（）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 fieldC、 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.
What does the mac packet-classify command do when applied to an interface configuration？（）A、 It enables MAC ACLs to be applied to only IP packets that enter the interface.B、 It enables MAC ACLs to be applied to only non-IP packets that enter the interface.C、 It enables MAC ACLs to be applied to all packets that enter the interface.D、 It enables MAC ACLs to be used for QoS settings.
Which three characteristics of the traffic flow are taken into consideration when the QoS-for-VPNs feature （QoS pre-classify） provides packet classification and applies appropriate QoS service on tunnel interfaces？（）A、IP precedence bitsB、DSCP bitsC、original port numbersD、DE bitsE、source IP addressF、destination IP address
What are three factors used to determine the amount of bandwidth that is required for a single VoIP call？（）A、codecB、link speedC、Layer 2 encapsulationD、packet overhead （IP/UDP/RTP）E、link delayF、total number of simultaneous calls that are allowed
Which two types of QoS functionality will be provided by Network-Based Application Recognition？（）A、NBAR provides the ability to configure MCQ； it is a mandatory MCQ component.B、NBAR provides deep packet inspection and is used for advanced packet classification.C、NBAR provides per-protocol packet and byte accounting functionality； it is used to track bandwidth utilization for all protocols described in the loaded PDLMs.D、NBAR provides scheduling in an MQC policy map using an advanced algorithm.
Which statement correctly describes the disabling of IP TTL propagation in an MPLS network？（）A、The TTL field from the IP packet is copied into the TTL field of the MPLS label header at the ingress edge LSRB、TTL propagation cannot be disabled in an MPLS domainC、TTL propagation is only disabled on the ingress edge LSRD、The TTL field of the MPLS label header is set to 255E、The TTL field of the IP packet is set to 0
What are two QoS mechanisms that are used to prevent packet loss？（）A、header compressionB、payload compressionC、low latency queuing （LLQ）D、weighted random early detection （WRED）E、traffic policingF、traffic shaping
Which three statements are true about the appliance of QoS models？（）A、the DiffServ model requires applications to signal the network with QoS requirementsB、the DiffServ model can be used to deliver QoS based upon IP precedence， or source and destination addressesC、the DiffServ model requires RSVPD、the best effort model is suitable for applications such as file transfer and e-mailE、the IntServ model requires applications to signal the network with QoS requirementsF、the IntServ model model attempts to deliver a level of service based on the QoS specified by each packet
What accurately describes the usage of a Cisco AutoQoS command？（）A、on Catalyst switches， the show auto discovery qos command is used to display the data collected during the Auto-Discovery phaseB、on Catalyst switches， the show auto qos command is used to display packet statistics of all classes that are configured for all service policiesC、on Cisco routers， the show mls qos maps command is used to verify the CoS-to-DSCP maps for egress packet queuingD、on Cisco routers， the show auto qos command is used to display the AutoQoS interface templates， policy maps， class maps， and ACLs
What are two characteristics of multi-field classification?（）A、implemented with firewall filtersB、typically configured on core routersC、typcially configured on customer facing routersD、implemented with Behavior Aggregate (BA) classification
多选题Which two QoS classification and marking statements are true？（）AIn a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit.BIn 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 fieldCIn an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values.DThe differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet.EThe 802.10 standard uses a three bitfield referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.
单选题Which statement correctly describes the disabling of IP TTL propagation in an MPLS network？（）AThe TTL field from the IP packet is copied into the TTL field of the MPLS label header at the ingress edge LSRBTTL propagation cannot be disabled in an MPLS domainCTTL propagation is only disabled on the ingress edge LSRDThe TTL field of the MPLS label header is set to 255EThe TTL field of the IP packet is set to 0
多选题Which three statements are true about the appliance of QoS models？（）Athe DiffServ model requires applications to signal the network with QoS requirementsBthe DiffServ model can be used to deliver QoS based upon IP precedence， or source and destination addressesCthe DiffServ model requires RSVPDthe best effort model is suitable for applications such as file transfer and e-mailEthe IntServ model requires applications to signal the network with QoS requirementsFthe IntServ model model attempts to deliver a level of service based on the QoS specified by each packet
多选题Which three statements about classification marking of traffic at Layer 2 are true？ （）Aa Frame Relay header includes a 1-bit discard eligible （DE） bit to provide the class of service （CoS）Ban ATM header includes a 1-bit DE field to provide the CoSCan MPLS EXP field is inserted in the Layer 3 IP precedence field to identify the CoSDthe CoS field only exists inside Ethernet frames when 802.1Q or Inter-Switch Link （ISL） trunking is usedEin the IEEE 802.1p standard， three bits are used to identify the user priority bits for the CoSFin the IEEE 802.1q standard， six bits are used to identify the user priority bits for the CoS
单选题What does qos pre-classify provides inregardto implementing QoS over GRE/IPSec VPN tunnels？（）A enables IOS to copy the ToS field from the inner （original） IPheader to theouter tunnel IP headerB enables IOS to make a copy of the inner （original） IP header and to run a QoS classification before encryption， based on fields in the inner IP header.C enables IOS to classify packets based on the ToS field in the inner （original） IP headerD enables IOS to classify packets based on the ToS field in the outer tunnel IP headerE enables the IOS classification engine to only see a single encrypted and tunneledflow to reduce classification complexity
多选题What are two QoS mechanisms that are used to prevent packet loss？（）Aheader compressionBpayload compressionClow latency queuing （LLQ）Dweighted random early detection （WRED）Etraffic policingFtraffic shaping
多选题Which two QoS classification and marking statements are true？ （）AIn a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit.BIn 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.CIn an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values.DThe differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet.EThe 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.
单选题What accurately describes the usage of a Cisco AutoQoS command？（）Aon Catalyst switches， the show auto discovery qos command is used to display the data collected during the Auto-Discovery phaseBon Catalyst switches， the show auto qos command is used to display packet statistics of all classes that are configured for all service policiesCon Cisco routers， the show mls qos maps command is used to verify the CoS-to-DSCP maps for egress packet queuingDon Cisco routers， the show auto qos command is used to display the AutoQoS interface templates， policy maps， class maps， and ACLs
多选题Which three characteristics of the traffic flow are taken into consideration when the QoS-for-VPNs feature （QoS pre-classify） provides packet classification and applies appropriate QoS service on tunnel interfaces？（）AIP precedence bitsBDSCP bitsCoriginal port numbersDDE bitsEsource IP addressFdestination IP address
单选题What does the mac packet-classify command do when applied to an interface configuration？（）A It enables MAC ACLs to be applied to only IP packets that enter the interface.B It enables MAC ACLs to be applied to only non-IP packets that enter the interface.C It enables MAC ACLs to be applied to all packets that enter the interface.D It enables MAC ACLs to be used for QoS settings.
问答题What field in IP packet is used for classification by QOS？