All About Best Quality 400-201 practice test

Q1. Refer to the exhibit. 

Customer ABC is peering with two service providers for Internet Access In order to prevent the AS100 from becoming a transit AS between ISP_1 and ISP_2 Which BGP configuration must be applied to achieve this goal? 

A. CE1# 

ip as-path access-list 1 permit ^$ 

route-map LOCAL_ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.2.2 route-map LOCAL_ONLY in 

CE2# 

ip as-path access-list 1 permit ^$ 

route-map LOCAL_ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.1.2 route-map LOCAL-ONLY in 

B. CE1# 

ip as-path access-list 1 permit ^11$ 

route-map LOCAL_ONLY permit 10 

match as-path 1 

, router bgp 100 

neighbor 1.1.1.2 route-map LOCAL_ONLY out 

CE2# 

ip as-path acctss-list 1 permit ^22$ 

router-map LOCAL.ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.1.2 routt-map LOCAL_ONLY out 

C. CE1# 

ip as-path access-list 1 permit ^$ 

route-map LOCAL_ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.2.2 route-map LOCAL_ONLY out 

CE2# 

ip as-path access-list 1 permit ^$ 

route-map LOCAL_ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.1.2 route-map LOCAL_ONLY out 

D. CE1# 

ip as-path access-list 1 permit ^100$ 

route-map LOCAL_ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.2.2 route-map LOCAL_ONLY out 

CE2# 

ip as-path access-list 1 permit ^100S 

route-map LOCAL_ONLY permit 10 

match as-path 1 

router bgp 100 

neighbor 1.1.1.2 route-map LOCALJDNLY out 

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Q2. Due to recent acquisitions, a company's MPLS infrastructure is growing very quickly. Concerns anse about labeling service provider core network The IP address space is designed as per following: 

. Service provide ip address range is: 10.0.0.0/16 

. All loopback addresses use subnet mask/32 

. 10.0.0.0/24 range is used for loopback addresses 

. All other subnet masks used for links are /24 and /25 

Which command would significantly reduce the label allocations without compromising LDP functionalities? 

A. mpls Idp label 

allocate global host-routes 

B. ip prefix-list List1 deny 10.0.0J16 le 20 ge 25 

! 

mpls Idp label 

allocate global prefix-list List1 

C. access-list 1 permit 10.0.0.0.0.0.255.255 

mpls Idp neighbor 10.0.0.1 labels accept 3 

D. mpls Idp password required for 10 

! 

access-list 10 permit 10.0.0.1 

access-list 10 permit 10.0.0.2 

access-list 10 permit 10.0.0.3 

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Q3. What is the main advantage of H-VPLS over VPLS? 

A. H-VPLS provides redundancy. 

B. H-VPLS provides security. 

C. H-VPLS improves the scalability. 

D. H-VPLS allows a broader use of protocols. 

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Q4. In order to prevent malicious traffic flows, how does BGPsec protect prefix advertisements? 

A. It validates only the originating AS. 

B. It validates routes with encryption. 

C. It validates the AS path. 

D. It validates the next-hop AS. 

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Q5. A MPP has been implemented in a Cisco IOS-XR device. Which are the two results that will occur? (Choose two.) 

A. If MPP is disabled and a protocol is activated, all interfaces cannot pass traffic 

B. MPP configuration changes doesn't affect active sessions established before the changes 

C. RP/DRP Ethernet Interfaces are not default out-of-band interfaces 

D. Management traffic to RP from all non-MPP interfaces is dropped 

E. Interfaces configured for out-of-band MPP are still part of global routing/forwarding 

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Q6. The following congestion avoidance configuration has been applied on an outgoing interface: 

Which is the result of the egress packets marked as DSCP AF32 when the average queue depth is 40? 

A. It will be dropped with a random rate less than the one defined by MPD. 

B. It will be tail dropped. 

C. It will be dropped with a rate of 1 packet out of 30. 

D. It will be dropped with a rate of 1 packet out of 20. 

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Q7. Which MPLS technology will achieve LAN extensions over the service provider backbone? 

A. AToM 

B. VPLS 

C. L2VPN 

D. L2TPv3 

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Q8. Which are the four key design requirements for mobile IP backhaul? (Choose four) 

A. network timing distribution and recovery 

B. MPLS-enabled interface 

C. Layer 2 Tunneling 

D. X2 interface turning point 

E. DiffServ QoS 

F. bandwidth 

G. native IPv6 support 

H. mandatory Layer 3 access up to a cell site 

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Q9. Refer to the exhibit: 

A regional operations center recently set up a MPLS Inter-AS Option B solution for two service providers There is no intercommunication between CE1 and CE2 sites yet While troubleshooting this issue on the ASBR1 router, the operations engineer sees the following log: 

BGP(4): 10.24.32.253 rcvd 100:101:40.72.97.0/24, label 136 -- DENIED due to: extended community not supported; What does this log mean? 

A. The route-target value does not match the one in the local VRF 

B. The community that was applied on ASBR 10.24.32.253 does not match the local policies 

C. The bgp default route-target filter command is missing on both inter-AS ASBRs 

D. The BGP command retain route-target all is missing 

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Q10. Which OSPF configuration suppresses the periodic OSPF hello packets? 

A. router ospf 1 

area0 

interface GigabitEthernet 0/1 

passive 

B. router ospf 1 

area0 

interface GigabitEthernet 0/1 

C. router ospf 1 

area 0 

interface GigabitEthernet 0/1

stub-router 

router-lsa r-bit 

D. router ospf 1 

area 0 

interface GigabitEthernet 0/1 

demand-circuit 

point-to-point 

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