单项选择题

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.

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热门试题

多项选择题WhichtwoarenativelyincludedbytheIEEE802.1wstandard？（）

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）

多项选择题WhichtwoattributesneedtomatchfortwoswitchestobecomemembersofthesameMSTregion？（）

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

单项选择题Multicastisbeingdeployedinthenetwork，andonlyippimsparse-densemodehasbeenconfiguredonallinterfacesinthenetworktosupportanewvideostreamingapplication.Noothermulticastconfigurationwasappliedanywhereinthenetwork.Sinceenablingmulticast，thenetworkmonitoringtoolsshowperiodic spikesinlinkutilizationthroughoutthenetwork，eveninareaswherethevideoapplicationisnotbeingused.Whatcouldbeapossiblecause？（）

A.PIM sparse mode is being used.
B.PIM dense mode is being used.
C.The BGP multicast address family has not been configured.
D.IGMP version 3 is being used.
E.IP PIM neighbor filters have not been applied.

单项选择题WhichconfigurationwouldmakeanIPSLAprobeuseaprecedencevalueof5？（）

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

单项选择题YouarethenetworkadministratorofanenterprisecompanythatjustdeployedaglobalIPtelephonyenvironment.Inordertoguaranteegoodvoicequality，youaskedyourprovidertoimplementQoSonthe CEroutersofyourMPLSnetwork.OnyourLAN，youhavealsodeployedQoS.Users，however，keepcomplainingaboutbadvoicequality，andtheproviderdoesnotseematchesonthe DSCPvaluesthatyouhaveaskedhimtomatchupon.Whatismostlikelytheproblem？（）

A.The phones are not sending traffic with the correct DSCP value.
B.The Cisco CallManager is not marking the traffic correctly.
C.This is most likely a bug on the CE routers.
D.Your LAN QoS is incorrectly configured.