在R2的BGP里面:network 198.16.0.0/16 network 10.1.1.0/19 network 10.1.1.0/24.在R1上要求只收:10.1.1.0/19的路由。請選擇在R1上面的哪個配置是正確的:
1.access-list 100 permit ip 10.1.0.0 0.0.0.255 host 255.255.224.0
Router bgp 1
Distribute-list 100 in
2.access-list 10 permit 10.1.0.0 0.0.31.0
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A.data marked with DSCP AF21,VOIP marked with DSCP EF
B.data marked with DSCP AF51,VOIP marked with DSCP EF
C.data marked with the DE-bit,VOIP marked with the CLP-bit
D.data marked with DSCP EF,VOIP marked with DSCP AF31
E.data marked with IP precedence 5 VOIP marked with DSCP EF
A.mark VOIP traffic with IP precedence 6 and configure only ’fair-queue’ on the links
B.configure the scheduler allocate 3000 1000 command to allow the QoS code to have enough CPU cycles
C.enable class-based traffic shaping on the VoIP traffic class
D.enable Layer 2 fragmentation and interleaving on the links
E.enable Frame Relay on the links and send voice and data on different Frame Relay PVCs
A.Guaranteed PHB
B.Class-Selector PHB
C.Reserved Forwarding PHB
D.Discard Eligible PHB
E.Priority PHB
A.with traffic shaping,a router stores excess traffic in packet buffers until bandwidth is available again
B.with policing you can tune the buffer usage for traffic exceeding the specified CIR
C.with shaping you can tune the buffer usage for traffic exceeding the specified CIR
D.shaping should only be applied for ingress traffic,policing only for egress
E.policing uses a token bucket algorithm,shaping uses an SPD algorithm
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