SPCORE question of the day
- Thread starter PlAwAnSaI
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PlAwAnSaI
Administrator
On a Cisco IOS XR router, which mechanism protects the router resources by filtering and policing the packets flows that are destined to the router that is based on defined flow-type rates?
A. Committed Access Rate
B. ACL
C. Management Plane Protection
D. NetFlow
E. Control Plane Policing
F. LLQ
G. LPTS
A. Committed Access Rate
B. ACL
C. Management Plane Protection
D. NetFlow
E. Control Plane Policing
F. LLQ
G. LPTS
PlAwAnSaI
Administrator
When implementing MPLS DS-TE on Cisco IOS XR routers, all aggregate Cisco MPLS TE traffic is mapped to which class type by default?
A. class-type 2 (bandwidth priority)
B. class-type class-default (bandwidth best-effort)
C. class-type 0 (bandwidth global pool)
D. class-type 1 (bandwidth subpool)
A. class-type 2 (bandwidth priority)
B. class-type class-default (bandwidth best-effort)
C. class-type 0 (bandwidth global pool)
D. class-type 1 (bandwidth subpool)
PlAwAnSaI
Administrator
On the Cisco IOS XR, which MQC configuration is different than on the Cisco IOS and IOS XE?
A. On the Cisco IOS XR, WRED can only be applied in the output direction.
B. On the Cisco IOS XR, LLQ can be applied in the input or output direction.
C. On the Cisco IOS XR, LLQ can use up to four priority queues: level 1, level 2, level 3, and level 4.
D. On the Cisco IOS XR, marking can only be applied in the input direction.
A. On the Cisco IOS XR, WRED can only be applied in the output direction.
B. On the Cisco IOS XR, LLQ can be applied in the input or output direction.
C. On the Cisco IOS XR, LLQ can use up to four priority queues: level 1, level 2, level 3, and level 4.
D. On the Cisco IOS XR, marking can only be applied in the input direction.
PlAwAnSaI
Administrator
On Cisco routers, how is hierarchical QoS implemented?
A. Use the policy-map command within a service-policy to implement nested policy-maps.
B. Within the child policy, reference another parent policy using the policy-map command.
C. Within the parent policy-map, reference another child policy-map using the service-policy command.
D. Within the parent policy, reference another child policy using the policy-map command.
A. Use the policy-map command within a service-policy to implement nested policy-maps.
B. Within the child policy, reference another parent policy using the policy-map command.
C. Within the parent policy-map, reference another child policy-map using the service-policy command.
D. Within the parent policy, reference another child policy using the policy-map command.
PlAwAnSaI
Administrator
Refer to the Cisco IOS XR policy-map configuration exhibit.
policy-map test
!
class one
priority level 1
!
class two
priority level 2
!
class three
bandwidth percent 60
!
interface GigabitEthernet0/0/0/2
service-policy output test
!
What is wrong with the policy-map configuration?
A. missing the bandwidth command under class one and class two
B. missing the priority percent command under class one and class two
C. missing the police command under class three
D. missing the police command under class one and class two
E. missing the priority bandwidth command under class one and class two
policy-map test
!
class one
priority level 1
!
class two
priority level 2
!
class three
bandwidth percent 60
!
interface GigabitEthernet0/0/0/2
service-policy output test
!
What is wrong with the policy-map configuration?
A. missing the bandwidth command under class one and class two
B. missing the priority percent command under class one and class two
C. missing the police command under class three
D. missing the police command under class one and class two
E. missing the priority bandwidth command under class one and class two
PlAwAnSaI
Administrator
When configuring class-based WRED on Cisco routers, which WRED parameter is not user configurable on a Cisco IOS XR but is user configurable on a Cisco IOS and IOS XE?
A. the maximum threshold
B. the minimum threshold
C. the ingress or egress direction where the class-based WRED policy will be applied
D. the mark probability denominator
A. the maximum threshold
B. the minimum threshold
C. the ingress or egress direction where the class-based WRED policy will be applied
D. the mark probability denominator
PlAwAnSaI
Administrator
Which of the following three statements are correct regarding IPv6 QoS?
A. DS-TE is not supported by IPv6.
B. Per-hop behavior in IPv6 networks is based on EXP bits.
C. A 20-bit flow label field enables per-flow processing.
D. IPv6 QoS features are configured using the modular QoS CLI on Cisco routers.
E. The traffic class field in the IPv6 header can be used to set specific precedence or DSCP values.
A. DS-TE is not supported by IPv6.
B. Per-hop behavior in IPv6 networks is based on EXP bits.
C. A 20-bit flow label field enables per-flow processing.
D. IPv6 QoS features are configured using the modular QoS CLI on Cisco routers.
E. The traffic class field in the IPv6 header can be used to set specific precedence or DSCP values.
PlAwAnSaI
Administrator
With unmanaged CE routers, at which point in the service provider network is the QoS trust boundary, and what is required at the trust boundary?
A. between the customer network and the CE router ingress and applying the required egress QoS policy on the CE router
B. between the PE and P router and trusting the QoS markings from the CE router and applying the required QoS mechanisms based on the customer QoS markings
C. between the CE and PE router and mapping of the customer traffic classes into the service provider traffic classes at the PE router ingress
D. between the PE and the P router and mapping of the customer traffic classes into the service provider traffic classes at the P router ingress
E. between the CE and PE router and trusting the QoS markings from the CE router and applying the required QoS mechanisms based on the customer QoS markings
A. between the customer network and the CE router ingress and applying the required egress QoS policy on the CE router
B. between the PE and P router and trusting the QoS markings from the CE router and applying the required QoS mechanisms based on the customer QoS markings
C. between the CE and PE router and mapping of the customer traffic classes into the service provider traffic classes at the PE router ingress
D. between the PE and the P router and mapping of the customer traffic classes into the service provider traffic classes at the P router ingress
E. between the CE and PE router and trusting the QoS markings from the CE router and applying the required QoS mechanisms based on the customer QoS markings
PlAwAnSaI
Administrator
On the Cisco IOS XR, when using the match protocol command within a class-map to classify traffic, you noticed that the match protocol option on the Cisco IOS XR shows much fewer protocol options than on the Cisco IOS or IOS XE, like there is no option such as the match protocol yahoo-messenger command on the Cisco IOS XR. Why is this?
A. because NBAR is not supported on the Cisco IOS XR
B. because when defining the class-map, the class-map type should be set to type inspect: class-map type inspect class-map-name command
C. because the Cisco IOS XR router does not have the correct software packages installed
D. because flexible packet matching has not been enabled on the Cisco IOS XR router
A. because NBAR is not supported on the Cisco IOS XR
B. because when defining the class-map, the class-map type should be set to type inspect: class-map type inspect class-map-name command
C. because the Cisco IOS XR router does not have the correct software packages installed
D. because flexible packet matching has not been enabled on the Cisco IOS XR router
PlAwAnSaI
Administrator
Which three steps are required to configure QPPB on Cisco IOS XR routers?
A. Define a QPPB route policy to match the customer IP precedence or qos-group markings, then set the BGP community
B. Enable QPPB on an interface using the ipv4 bgp policy propagation input ip-precedence|qos-group destination|source command
C. Define a QPPB route policy to match the customer routes, then set the IP precedence or qos-group
D. Apply a QPPB route policy to the BGP neighbor using the route-policy command
E. Enable QPPB on an interface using the ipv4 bgp policy propagation output ip-precedence|qos-group destination|source command
F. Apply a QPPB route policy to the BGP process using the table-policy command
A. Define a QPPB route policy to match the customer IP precedence or qos-group markings, then set the BGP community
B. Enable QPPB on an interface using the ipv4 bgp policy propagation input ip-precedence|qos-group destination|source command
C. Define a QPPB route policy to match the customer routes, then set the IP precedence or qos-group
D. Apply a QPPB route policy to the BGP neighbor using the route-policy command
E. Enable QPPB on an interface using the ipv4 bgp policy propagation output ip-precedence|qos-group destination|source command
F. Apply a QPPB route policy to the BGP process using the table-policy command
PlAwAnSaI
Administrator
The Cisco IOS and IOS XE qos pre-classify command allows which kind of packet classification on IP packets that are encapsulated with GRE and IPsec?
A. allows for packets to be classified based on the packet payload after packet encryption
B. allows for packets to be classified based on the ToS byte values before packet encryption
C. allows for packets to be classified based on the packet payload before packet encryption
D. allows for packets to be classified based on the packet header parameters other than the ToS byte values after packet encryption
E. allows for packets to be classified based on the ToS byte values after packet encryption
A. allows for packets to be classified based on the packet payload after packet encryption
B. allows for packets to be classified based on the ToS byte values before packet encryption
C. allows for packets to be classified based on the packet payload before packet encryption
D. allows for packets to be classified based on the packet header parameters other than the ToS byte values after packet encryption
E. allows for packets to be classified based on the ToS byte values after packet encryption
PlAwAnSaI
Administrator
Which are typical class-based marking policies that are implemented on service provider IP NGN PE routers?
A. On the PE ingress, classify the customer traffic and then mark with qos-group. On the PE egress, classify based on the qos-group and then mark with mpls exp.
B. On the PE ingress, trust the customer QoS markings. On the PE egress, classify based on the customer QoS markings and then mark with mpls exp.
C. On the PE ingress, classify the customer traffic and then mark with mpls exp. On the PE egress, classify based on the mpls exp and then mark with qos-group.
D. On the PE ingress, trust the customer QoS markings. On the PE egress, classify based on the customer QoS markings and then mark with qos-group.
A. On the PE ingress, classify the customer traffic and then mark with qos-group. On the PE egress, classify based on the qos-group and then mark with mpls exp.
B. On the PE ingress, trust the customer QoS markings. On the PE egress, classify based on the customer QoS markings and then mark with mpls exp.
C. On the PE ingress, classify the customer traffic and then mark with mpls exp. On the PE egress, classify based on the mpls exp and then mark with qos-group.
D. On the PE ingress, trust the customer QoS markings. On the PE egress, classify based on the customer QoS markings and then mark with qos-group.