多項選擇題Which three statements are true about policing?()

A.Out-of-profile packets are queued.
B.It causes TCP retransmits.
C.Marking and remarking are not supported.
D.It does not respond to BECN and foresight messages.
E.It uses a single- and two-bucket mechanism for metering.


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1.單項選擇題

Refer to the exhibit. R2 and R3 are routers connected using Ethernet services from a service provider and can receive pings from each other. OSPF is configured as the routing protocol but adjacency is not happening. According to the output of the show commands in the exhibit, what could be the most likely cause of the problem? ()

A. Ethernet interfaces were configured as point-to-point.
B. Process IDs are not matching.
C. Configured bandwidths do not match on both interfaces.
D. Broadcasts and multicast are not being propagated over the Ethernet services.
E. OSPF cost does not match on both interfaces.

2.多項選擇題Which two are natively included by the IEEE 802.1w standard?()

A.instances can control a selection of VLANs
B.load balancing
C.fast transition to forwarding state
D.backbone,uplink,and portfast (or equivalent)
E.root,loop,and BPDU guard (or equivalent)

3.多項選擇題Which two attributes need to match for two switches to become members of the same MST region?()

A.the table of 4096 elements that map the respective VLAN to STP instance number
B.VTP version
C.configuration revision number
D.native VLAN ID

5.單項選擇題Which configuration would make an IP SLA probe use a precedence value of 5?()

A.ip sla 1 icmp-echo 1.1.1.1 tos 160
B.ip sla 1 icmp-echo 1.1.1.1 tos 20
C.ip sla 1 icmp-echo 1.1.1.1 precedence 5
D.ip sla 1 icmp-echo 1.1.1.1 dscp 20

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