Practice Free 400-007 Exam Online Questions
Refer to the exhibit.
Your company designed a network to allow server VLANs to span all access switches in a data center In the design, Layer 3 VLAN interfaces and HSRP are configured on the aggregation switches.
Which two features improve STP stability within the network design? (Choose two.)
- A . BPDU guard on access ports
- B . BPDU guard on the aggregation switch downlinks toward access switches
- C . root guard on the aggregation switch downlinks toward access switches
- D . root guard on access ports
- E . edge port on access ports
- F . access switch pairs explicitly determined to be root and backup root bridges
What is the best approach to ensure both scalability and high availability for a cloud-based storage solution over the IP network?
- A . Using a RAID (Redundant Array of Independent Disks) setup to provide data redundancy and improve performance.
- B . Deploying a Content Delivery Network (CDN) to cache and serve frequently accessed storage content.
- C . Implementing Network Attached Storage (NAS) devices in a clustered configuration for load balancing.
- D . Utilizing a Storage Area Network (SAN) with redundant controllers and paths for storage access.
The controller has a global view of the network, and it can easily ensure that the network is in a consistent and optimal configuration.
Which two statements describe a centralized SDN control path? (Choose two.)
- A . Scaling of the centralized controller cluster is challenging for services like DHCP and load-balancing.
- B . It is highly-available by design with no single-point-of-failure risks present.
- C . Integrating smart NIC capabilities on the local host level is made easier through rest APIs.
- D . It significantly improves the latency when performing reactive handling of PACKET_IN events.
- E . It centralized controller can support all southbound APIs, which allows for easy integration with legacy equipment.
Refer to the exhibit.
A company has a hybrid cloud architecture with two on-premises data centers that connect to a public cloud service provider by using direct connect and eBGP routing. Encryption is unsupported by the cloud service provider, so the company plans to use an IPsec overlay network over its direct connects. Two virtual network appliances will be installed in the cloud infrastructure to establish tunnels and perform routing The company chose OSPF as the overlay routing protocol because the operations team is familiar with the protocol and because OSPF is the IGP on the on-premises network. The cloud network must be as isolated as possible from the on-premises network.
What must be used for the OSPF overlay connectivity?
- A . different OSPF area. NVA as the ABR
- B . different OSPF area. Cloud Edge as the ABR
- C . different OSPF instance. Cloud Edge as the ASBR
- D . different OSPF instance. NVA as the ASBR
Backups and mirror-copies of data are an essential part of RPO solutions.
If a business wants to reduce their CAPEX for disaster recovery, which of the following solutions are applicable?
- A . Perform an annual cyber security assessment or penetration test
- B . Renew backup software annually to get the newest version of the console and stay protected
- C . Migrate parts of or all the infrastructure to the cloud
- D . Build a redundant infrastructure for business continuity / disaster recovery purposes at another location
Company XYZ Is running a redundant private WAN network using OSPF as the underlay protocol. The current design accommodates for redundancy In the network, but it Is taking over 30 seconds for the network to reconverge upon failure.
Which technique can be Implemented In the design to detect such a failure in a subsecond?
- A . STP
- B . fate sharing
- C . OSPF LFA
- D . BFD
- E . flex links
As more links are added to the network, information and attributes related to the link is added to the control plane meaning every link that gets added will slow down the convergence of the control plane by some measurable amount of time.
As a result when additional redundancy is built or added the MTTR will increase too.
Which risk increases along with the increased MTTR?
- A . management visibility
- B . slower data plane convergence
- C . overlapping outages
- D . topology change detection
Your company utilizes many different types of network transports and you want to increase the efficiency of the network.
Which solution can be used to improve network efficiency over PPPoE IPsec, and GRE networks?
- A . PMTUD
- B . OATM
- C . IRDP
- D . Host Discovery Protocol
Refer to the exhibit.
Company XYZ BGP topology is as shown in the diagram. The interface on the LA router connected toward the 10.1.5.0/24 network is faulty and is going up and down, which affects the entire routing domain.
Which routing technique can be used in the routing policy design so that the rest of the network is not affected by the flapping issue?
- A . Use route dampening on LA router for the 10 1 5 0/24 network so that it does not get propagated when it flaps up and down
- B . Use route filtering on Chicago router to block the 10.1.5.0/24 network from coming in from the LA router
- C . Use route filtering on LA router to block the 10.15.0/24 network from getting propagated toward Chicago and New York
- D . Use route aggregation on LA router to summarize the 10.1.4.0V24, 10.1.5.0724, 10.1.6.0/24. and 10.1.7.0/24 networks toward Chicago
Which three tools are used for ongoing monitoring and maintenance of a voice and video environment? (Choose three.)
- A . flow-based analysis to measure bandwidth mix of applications and their flows
- B . call management analysis to identify network convergence-related failures
- C . call management analysis to identify CAC failures and call quality issues
- D . active monitoring via synthetic probes to measure loss, latency, and jitter
- E . passive monitoring via synthetic probes to measure loss, latency, and jitter
- F . flow-based analysis with PTP time-stamping to measure loss, latency, and jitter