单选题With MPLS Fast Reroute, what is the "point of local repair"?（）A egress routerB ingress routerC start of the bypass tunnelD all routers in the bypass tunnel

第1题：

第2题：

Which three statements about the Cisco MPLS TE Fast Reroute （FRR） process are true？（）

• A、TE tunnels that are configured with the FRR option cannot be used as backup tunnels.
• B、TE tunnels that are configured with the FRR option can be used as backup tunnels.
• C、The backup tunnel that is used to protect a physical interface must have a valid IP address configured.
• D、Interfaces must use MPLS global label allocation.
• E、The source IP address of use backup tunnel and the merge point （MP） should not be reachable.

正确答案:A,C,D

第3题：

On Cisco Nexus 5000 Series Switches， where are the virtual output queues implemented， and what is the main purpose of virtual output queues？（）

• A、 on all ingress interfaces； to ensure maximum throughput on a per-egress， per-CoS basis
• B、 on all ingress interfaces； to provide independent congestion management and 16 queues
• C、 on all egress interfaces； so that a congested egress port does not affect traffic directed to other egress ports
• D、 on all egress interfaces； to prevent head-of-line blocking by utilizing multiple virtual output queues
• E、 on all egress interfaces； to be able to use EEE 802.1p CoS

正确答案:A

第4题：

Which router or router combination is used to calculate the MPLS traffic engineering tunnel path？（）

• A、head-end router and tail-end router
• B、middle-point router
• C、head-end router
• D、tart-end router
• E、tail-end router

正确答案:C

第5题：

What is true about a Bypass Tunnel in MPLS Fast Reroute?（）

• A、Only configured on the egress router
• B、Only configured on the ingress router
• C、Is pre-signalled to reduce packet loss
• D、Must intersect the primary LSP at two locations

正确答案:D

第6题：

Which statement about MPLS TE Fast Reroute （FRR） link protection operation is not true？（）

• A、It requires a next-hop backup tunnel.
• B、The backup tunnel terminates on the same tail-end router as the primary tunnel.
• C、The point of local repair （PLR） swaps the label and pushes the backup label.
• D、The restoration time is expected to be under 50 ms.
• E、The backup tunnel can have associated bandwidth capacity

正确答案:B

第7题：

What is the IPv6 address FF02::2 used for?（）

• A、all routers in a local segment
• B、all routers in an autonomous system
• C、all hosts in a local segment
• D、all hosts in a particular multicast group

正确答案:A

第8题：

What is the term "ordered control" mean regarding how MPLS LSPs are established?（）

• A、establish starting at the egress router going back to the ingress router
• B、establish starting at the ingress router going downstream to the egress router
• C、establish when a router learns of a new prefix
• D、establish when the path correctly matches the reverse path forwarding check

正确答案:A

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第14题：

Which statement about the Cisco MPLS TE Fast Reroute （FRR） node protection operation is not correct？（）

• A、It requires a next-next hop backup tunnel.
• B、Point of local repair （PLR） swaps the next hop label and pushes the backup label.
• C、The backup tunnel terminates on the merge point （MP） where traffic rejoins the primary tunnel.
• D、The backup tunnel can have associated bandwidth capacity.
• E、Restoration time is expected under 50 ms.

正确答案:E

第15题：

Where are MPLS point-to-multipoint traffic engineering packets replicated？（）

• A、head-end router
• B、branch-point router
• C、midpoint router
• D、leaf-point router
• E、tail-end router

正确答案:B

第16题：

Which CLI command is used to enable MPLS Fast Reroute on a ingress router?（）

• A、mpls fast reroute
• B、mpls fast-reroute
• C、enable mpls fast-reroute
• D、tunnel mpls fast-reroute

正确答案:D

第17题：

With MPLS Fast Reroute, what is the "point of local repair"?（）

• A、egress router
• B、ingress router
• C、start of the bypass tunnel
• D、all routers in the bypass tunnel

正确答案:C

第18题：

How is an RSVP resv message sent back to the ingress router?（）

• A、reverse path of the RRO
• B、least cost to the ingress router
• C、shortest path to the egress router
• D、reverse path of the path vector TLV

正确答案:A

第19题：

What two statistics appear in show frame-relay map output?（）

• A、The number of FECN packets that are received by the router
• B、The number of BECN packets that are received by the router
• C、The ip address of the local router
• D、The value of the local DLCI
• E、The status of the PVC that is configured on the router

正确答案:D,E

第20题：

The policy action of color is used for congestion control under which circumstance?（）

• A、congestion in an upstream router
• B、congestion in a downstream router
• C、contention for queue space on an egress interface
• D、contention for queue space on an ingress interface

正确答案:C

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