最新Cisco 400-007一発合格！試験リアル問題集最新の[2023年10月]
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質問 # 20
Which two control plane policer designs must be considered to achieve high availability? (Choose two.)
- A. Control plane policers require that adequate protocols overhead are factored in to allow protocol convergence.
- B. Control plane policers are enforced in hardware to protect the software path, but they are hardware platform dependent in terms of classification ability.
- C. Control plane policers must be processed before a forwarding decision is made.
- D. Control plane policers are really needed only on externally facing devices.
- E. Control plane policers can cause the network management systems to create false alarms.
正解：B、C
質問 # 21
Refer to the exhibit.
For Company XYZ Bangkok is using ECMP to reach the 172 20 2 0/24 network The company wants a design that would allow them to forward traffic from 172 16 2 0/24 toward 172 20 2 0/24 via the Singapore router as the preferred route The rest of the traffic should continue to use ECMP Which technology fulfills this design requirement?
- A. route summarization
- B. LFA
- C. policy-based routing
- D. unequal-cost load balancing using variance
正解：C
質問 # 22
You were tasked to enhance the security of a network with these characteristics:
* A pool of servers is accessed by numerous data centers and remote sites
* The servers are accessed via a cluster of firewalls
* The firewalls are configured properly and are not dropping traffic
* The firewalls occasionally cause asymmetric routing of traffic within the server data center.
Which technology should you recommend to enhance security by limiting traffic that could originate from a hacker compromising a workstation and redirecting flows at the servers?
- A. Deploy uRPF loose mode
- B. Poison certain subnets by adding static routes to Null0 on the core switches connected to the pool of servers.
- C. Deploy uRPF strict mode.
- D. Limit sources of traffic that exit the server-facing interface of the firewall cluster with ACLs.
正解：D
質問 # 23
An MPLS service provider is offering a standard EoMPLS-based VPLS service to Customer A. providing Layer 2 connectivity between a central site and approximately 100 remote sites. Customer A wants to use the VPLS network to carry its internal multicast video feeds which are sourced at the central site and consist of 20 groups at Mbps each. Which service provider recommendation offers the most scalability?
- A. Enable snooping mechanisms on the provider PE routers.
- B. EoMPLS-based VPLS can carry multicast traffic in a scalable manner
- C. Replace VPLS with a Layer 3 MVPN solution to carry the streams between sites
- D. Use a mesh of GRE tunnels to carry the streams between sites
正解：C
質問 # 24
Refer to the exhibit.
There are multiple trees in the Cisco FabricPath All switches in the Layer 2 fabric share the same view of each tree. Which two concepts describe how the multicast traffic is load-balanced across this topology? (Choose two )
- A. Every leaf node assigns the specific (S.G) to the same tree.
- B. All trees are utilized at the same level of the traffic rate
- C. A specific (S.G) multicast traffic is load-balanced across all trees due to better link utilization efficiency.
- D. A specific (S.G) traffic is not load-balanced
- E. The multicast traffic is generally load-balanced across all trees
正解：B、C
質問 # 25
Which action must be taken before new VoIP systems are implemented on a network to ensure that the network is ready to handle the traffic?
- A. Enable special requirements such as direct DID lines on pickup
- B. Evaluate bandwidth utilization and connection quality
- C. Make recommendations to limit the size of the half-open session table on routers
- D. Check if anomaly detection is enabled for SIP and H.323 on Layer 3 devices
正解：A
質問 # 26
Which feature must be part of the network design to wait a predetermined amount of time before notifying the routing protocol of a change in the path in the network?
- A. Transmit delay
- B. Interface dampening
- C. SPF hold time
- D. Throttle timer
正解：D
質問 # 27
Refer to the exhibit.
There are multiple trees in the Cisco FabricPath All switches in the Layer 2 fabric share the same view of each tree. Which two concepts describe how the multicast traffic is load-balanced across this topology? (Choose two )
- A. Every leaf node assigns the specific (S.G) to the same tree.
- B. All trees are utilized at the same level of the traffic rate
- C. A specific (S.G) multicast traffic is load-balanced across all trees due to better link utilization efficiency.
- D. A specific (S.G) traffic is not load-balanced
- E. The multicast traffic is generally load-balanced across all trees
正解：B、C
質問 # 28
Which two actions must be taken when assessing an existing wireless network implementation for its readiness to support voice traffic? (Choose two.)
- A. Check for latency over wireless.
- B. Check for high channel utilization.
- C. Identify frequent TX power changes.
- D. Check for high roaming delay.
- E. Check for uniform radio coverage across the floors.
正解：B、D
解説：
https://community.cisco.com/t5/wireless/channel-utilization/td-p/2716667
質問 # 29
An enterprise organization currently provides WAN connectivity to their branch sites using MPLS technology, and the enterprise network team is considering rolling out SD-WAN services for all sites.
With regards to the deployment planning, drag and drop the actions from the left onto the corresponding steps on the right.
正解：
解説：
質問 # 30
A network design includes a long signaling delay in notifying the Layer 3 control plane that an interface has failed Which two of these actions would reduce that delay? (Choose two.)
- A. Increase the notification of interface flaps.
- B. Enable lower data link layer recovery systems to have an opportunity to restore the interface
- C. Reduce the time for the network to reconverge.
- D. Increase network stability.
正解：B、C
質問 # 31
Refer to the exhibit
A service provider has a requirement to use Ethernet OAM to detect end-to-end connectivity failures between SP-SW1 and SP- SW2 Which two ways to design this solution are true? (Choose two)
- A. Use upward maintenance endpoints on the SP switches
- B. Enable Connectivity Fault Management on the SP switches150
- C. Enable unicast heartbeat messages to be periodically exchanged between MEPs
- D. Forward E-LMI PDUs over VPLS
- E. Forward LLD PDUs over the VPLS
正解：A、B
質問 # 32
Which relationship between IBGP and the underlying physical topology is true?
- A. iBGP does not work on a ring network topology even with an underlying IGP.
- B. iBGP full mesh requirement does not dictate any specific network topology.
- C. iBGP can worn only on a ring network topology with a link-state protocol like OSPF or IS-IS
- D. iBGP full mesh requires an underlying fully meshed network topology.
正解：B
解説：
iBGP peers can be multiple hops away. not like eBGP that needs direct connection (or ebgp-multihop defined). thus, only IP connectivity between two peers is required for an adjacency to form.
質問 # 33
Company XYZ is running BGP as their routing protocol. An external design consultant recommends that TCP path MTU discovery be enabled. Which effect will this have on the network?
- A. It will enhance the performance of TCP-based applications.
- B. It will improve the convergence time.
- C. It will increase the convergence time.
- D. It will create a loop free path.
正解：A
質問 # 34
How many fully established neighbour relationships exist on an Ethernet with five routers running OSPF as network type broadcast?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
正解：D
質問 # 35
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