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Frequently Asked Questions

Cisco 400-007 Sample Question Answers

Question # 1

Which design principal improves network resiliency? 

A. Added load-balancing 
B. Added redundancy 
C. Added confidentiality 
D. Added reliability 

Question # 2

Which function is performed at the access layer of the three-layer hierarchical network design model? 

A. fault isolation 
B. QoS classification and marking boundary 
C. reliability - 
D. fast transport 
E. redundancy and load balancing 

Question # 3

Which three Cisco products are used in conjunction with Red Hat to provide an NFVi solution? (Choose three.) 

A. Cisco Prime Service Catalog 
B. Cisco Open Virtual Switch 
C. Cisco Nexus switches 
D. Cisco UCS 
E. Cisco Open Container Platform 
F. Cisco Virtual Network Function 

Question # 4

Which two technologies enable multilayer segmentation? (Choose two.) 

A. policy-based routing 
B. segment routing 
C. data plane markings 
D. firewalls 
E. filter lists 

Question # 5

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 

Question # 6

Which two possible drawbacks should you consider when introducing Network Functions Virtualization in a network design? (Choose two) 

A. Bandwidth utilization increases 
B. Traffic flows are suboptimal 
C. High-end routers are required to support NFV 
D. OpenFlow must be supported in the network 
E. An SDN orchestration layer is required to support NFV 

Question # 7

A. CWDM over dark fiber 
C. DWDM over dark fiber 
D. Metro Ethernet 

Question # 8

Company XYZ has a hub-and-spoke topology over an SP-managed infrastructure. To measure traffic performance metrics, they implemented IP SLA senders on all spoke CE routers and an IP SLA responder on the hub CE router. What must they monitor to have visibility on the potential performance impact due to the constantly increasing number of spoke sites? 

A. CPU and memory usage on the spoke routers 
B. memory usage on the hub router 
C. CPU usage on the hub router 
D. interface buffers on the hub and spoke routers 

Question # 9

Which two actions ensure voice quality in a branch location with a low-speed, high-latency WAN connection? (Choose two.) 

A. Increase WAN bandwidth 
B. Increase memory branch switch. 
C. Fragment data packets. 
D. Replace any electrical links with optical links 
E. Prioritize voice packets

Question # 10

A Service Provider is designing a solution for a managed CE service to a number of local customers using a single CE platform and wants to have logical separation on the CE platform using Virtual Routing and Forwarding (VRF) based on IP address ranges or packet length. Which is the most scalable solution to provide this type of VRF Selection process on the CE edge device? 

A. Static Routes for Route Leaking 
B. Policy Based Routing 
C. OSPF per VRF Instance 
D. Multi-Protocol BGP 

Question # 11

An enterprise network has two core routers that connect to 200 distribution routers and uses full-mesh IBGP peering between these routers as its routing method. The distribution routers are experiencing high CPU utilization due to the BGP process. Which design solution is the most cost effective? 

A. Implement route reflectors on the two core routers 
B. Increase the memory on the core routers 
C. Implement e BGP between the core and distribution routers
 D. Increase the memory on the distribution routers 
E. Increase bandwidth between the core routers 

Question # 12

A European national bank considers migrating its on-premises systems to a private cloud offering in a non-European location to significantly reduce IT costs. What is a primary factor prior to migration? 

A. data governance 
B. additional latency 
C. security 
D. cloud connectivity 

Question # 13

What are two key design principles when using a hierarchical core-distribution-access network model? (Choose two ) 

A. A hierarchical network design model aids fault isolation 
B. The core layer is designed first, followed by the distribution layer and then the access layer 
C. The core layer provides server access in a small campus. 
D. A hierarchical network design facilitates changes 
E. The core layer controls access to resources for security 

Question # 14

Which optimal use of interface dampening on a fast convergence network design is true? 

A. When occasional flaps of long duration occur 
B. when numerous adjacent flaps of very short duration occur 
C. when the router hardware it slower than the carrier delay down detection 
D. when the switch hardware is faster than the debounce timer down detection 

Question # 15

A customer asks you to perform a high level review of their upcoming WAN refresh for remote sites The review is specially focused on their retail store operations consisting of 500+ locations connected via mutlipoint IPsec VPN solution. Which routing protocol would be valid but would also be the most restrictive for the expansion of this deployment model? 


Question # 16

Which technology is an open-source infrastructure automation tool that automates repetitive tasks for users who work in networks such as cloud provisioning and intraservice orchestration? 

A. Ansible 
B. Contrail 
C. Java 
D. Jinja2 

Question # 17

Which network management framework can be used to develop a network architecture that contains business requirements analysis, gap analysis, and network diagrams as artifacts to be used for design and implementation later? 

D. Cobit 

Question # 18

Company ABC wants to minimize the risk of users plugging unauthorized switches and hubs into the network Which two features can be used on the LAN access ports to support this design requirement? (Choose two.) 

A. Loop Guard 
B. PortFast 
D. Root Guard
 E. BPDU Guard 

Question # 19

You are tasked to design a QoS policy for a service provider so they can include it in the design of their MPLS core network If the design must support an MPLS network with six classes, and CEs will be managed by the service provider, which QoS policy should be recommended? 

A. map IP CoS bits into the IP Precedence field 
B. map flow-label bits into the Exp field 
C. map IP precedence bits into the DSCP field 
D. map DSCP bits into the Exp field 

Question # 20

Which three items do you recommend for control plane hardening of an infrastructure device? (Choose three.) 

A. redundant AAA servers 
B. Control Plane Policing 
C. warning banners 
D. to enable unused .services 
E. SNMPv3 F. routing protocol authentication 

Question # 21

Which two points must network designers consider when designing a new network design or when evaluating an existing network design to help them understand the high-level design direction with regards to the security aspects? (Choose two) 

A. Consider Business objectives and goals 
B. Consider organization’s security policy standards 
C. Consider for only multi-site networks 
D. Consider for only new network technologies and components 

Question # 22

Refer to the exhibit.

A. The transit_delay=5 and dpdu_delay=20 are recommended values, considering helto_timer=2 and specified 
B. Only the maximum_transmission_halt_delay and diameter parameters are configurable parameters in 802. to speed up STP convergence process C. The max_age and forward delay parameters can be adjusted to speed up STP convergence process. 
C. Only the transit_delay and bpdu_delay timers are configurable parameters in 802.1d to speed up STP convergence process. 

Question # 23

Refer to the diagram. 

A. Send packets from the foreign controller to the anchor controller via Layer 3 MPLS VPN or VRF-Lite 
B. Send packets without encapsulation to the anchor controller over the routed network. 
C. Encapsulate packets into an EoIP tunnel and send them to the anchor controller. 
D. Send packets from the foreign controller to the anchor controller via IPinIP or IPsec tunnel. 

Question # 24

What are two common approaches to analyzing and designing networks? (Choose two.) 

A. bottom-up approach 
B. high-low security approach 
C. top-down approach 
D. left-right approach 
E. three-tier approach 

Question # 25

Company XYZ is in the process of identifying which transport mechanism(s) to use as their WAN technology. Their main two requirements are. • a technology that could offer DPI, SLA, secure tunnels, privacy, QoS, scalability, reliability, and ease of management • a technology that is cost-effective Which WAN technology(ies) should be included in the design of company XYZ?

A. Software-defined WAN should be the preferred choice because it complements both technologies, covers all the required features, and it is the most cost-effective solution. 
B. Internet should be the preferred option because it is cost effective and supports BFD, IP SLA. and IPsec for secure transport over the public Internet. 
C. Both technologies should be used. Each should be used to back up the other one; where the primary links are MPLS, the internet should be used as a backup link with IPsec (and vice versa).
 D. MPLS meets all these requirements and it is more reliable than using the Internet. It is widely used with defined best practices and an industry standard. 

Question # 26

Which mechanism provides Layer 2 fault isolation between data centers? 

A. fabric path 
C. advanced VPLS 

Question # 27

You are using iSCSI to transfer files between a 10 Gigabit Ethernet storage system and a 1 Gigabit Ethernet server The performance is only approximately 700 Mbps and output drops are occurring on the server switch port. Which action will improve performance in a costeffective manner? 

A. Change the protocol to CIFS. 
B. Increase the queue to at least 1 GB 
C. Use a WRED random drop policy 
D. Enable the TCP Nagle algorithm on the receiver 

Question # 28

What are two primary design constraints when a robust infrastructure solution is created? (Choose two.) 

A. monitoring capabilities 
B. project time frame 
C. staff experience
D. component availability 
E. total cost 

Question # 29

Company XYZ network runs IPv4 and IPv6 and they want to Introduce a multidomain, multicast-based network. The new design should use a flavor of PIM that forwards traffic using SPT. Which technology meets this requirement? 


Question # 30

Company XYZ is redesigning their QoS policy. Some of the applications used by the company are real-time applications. The QoS design must give these applications preference in terms of transmission. Which QoS strategy can be used to fulfill the requirement? 

A. weighted fair queuing 
B. weighted random early detection 
C. low-latency queuing 
D. first-in first-out 

Question # 31

Which undesired effect of increasing the jitter compensation buffer is true? 

A. The overall transport jitter decreases and quality improves. 
B. The overall transport jitter increases and quality issues can occur. 
C. The overall transport delay increases and quality issues can occur. 
D. The overall transport delay decreases and quality improves.

Question # 32

Which architecture does not require an explicit multicast signaling protocol, such as PIM or P2MP, to signal the multicast state hop-by-hop, but instead uses a link state protocol to advertise the multicast forwarding state? 

A. Binary indexed explicit routing 
B. Binary intermediate enhanced routing 
C. Bit indexed explicit replication 
D. Bi-directional implicit replication 

Question # 33

Which BGP feature provides fast convergence? 

C. BGP FlowSpec 

Question # 34

A network architect must redesign a service provider edge, where multiservice and multitenant PEs are currently present. Which design feature should be minimized in the new design to achieve reliability? 

A. bridging
 B. fate sharing
C. redundancy 
D. unicast overlay routing 

Question # 35

Which two statements describe the hierarchical LAN design model? (Choose two) 

A. It is a well-understood architecture that provides scalability 
B. It is the best design for modern data centers 
C. It is the most optimal design but is highly complex 
D. It provides a simplified design 
E. Changes, upgrades, and new services can be introduced in a controlled and stagged manner 

Question # 36

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 network stability. 
B. Reduce the time for the network to reconverge. 
C. Increase the notification of interface flaps. 
D. Enable lower data link layer recovery systems to have an opportunity to restore the interface 

Question # 37

Company XYZ is planning to deploy primary and secondary (disaster recovery) data center sites. Each of these sites will have redundant SAN fabrics and data protection is expected between the data center sites. The sites are 100 miles (160 km) apart and target RPO/RTO are 3 hrs and 24 hrs, respectively. Which two considerations must Company XYZ bear in mind when deploying replication in their scenario? (Choose two.) 

A. Target RPO/RTO requirements cannot be met due to the one-way delay introduced by the distance between sites. 
B. VSANs must be routed between sites to isolate fault domains and increase overall availability. 
C. Synchronous data replication must be used to meet the business requirements 
D. Asynchronous data replication should be used in this scenario to avoid performance impact in the primary site.
E. VSANs must be extended from the primary to the secondary site to improve performance and availability. 

Question # 38

Which two impacts of adding the IP event dampening feature to a network design are true? (Choose two.) 

A. It protects against routing loops. 
B. It switches traffic immediately after a link failure.
 C. lt speeds up link failure detection. 
D. It reduces the utilization of system processing resources.
 E. It improves overall network stability. 

Question # 39

How many fully established neighbour relationships exist on an Ethernet with five routers running OSPF as network type broadcast? 

A. 5 
B. 6 
C. 7 
D. 10 
E. 20 

Question # 40

You are designing an Out of Band Cisco Network Admission Control. Layer 3 Real-IP Gateway deployment for a customer Which VLAN must be trunked back to the Clean Access Server from the access switch? 

A. authentication VLAN 
B. user VLAN 
C. untrusted VLAN 
D. management VLAN 

Question # 41

Refer to the exhibit. 

A. Increase the bandwidth on the connection between Router A and Router B 
B. Implement LSA filtering ontheAB, allowing summary routes and preventing more specific routes into Area 5 
C. Create a virtual link to Area 0 from Router B to the ABR 
D. Turn on LSA throttling on all devices in Area 5 E. Set Area 5 to stubby at the ABR anyway 

Question # 42

A. Metro Ethernet 

Question # 43

An architect receives a business requirement from a CTO that states the RTO and RPO for a new system should be as close as possible to zero. Which replication method and data center technology should be used? 

A. asynchronous replication over dual data centers via DWDM 
B. synchronous replication over geographically dispersed dual data centers via MPLS 
C. synchronous replication over dual data centers via Metro Ethernet 
D. asynchronous replication over geographically dispersed dual data centers via CWDM 

Question # 44

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? 

B. fate sharing 
E. flex links 

Question # 45

An architect designs a multi-controller network architecture with these requirements: Achieve fast failover to control traffic when controllers fail. Yield a short distance and high resiliency in the connection between the switches and the controller. Reduce connectivity loss and enable smart recovery to improve the SDN survivability. Improve connectivity by adding path diversity and capacity awareness for controllers. Which control plane component of the multi-controller must be built to meet the requirements? 

A. control node reliability 
B. controller stale consistency 
C. control path reliability 
D. controller clustering 

Question # 46

Which two control plane policer designs must be considered to achieve high availability? (Choose two.) 

A. Control plane policers are enforced in hardware to protect the software path, but they are hardware platform dependent in terms of classification ability. 
B. Control plane policers are really needed only on externally facing devices.
 C. Control plane policers can cause the network management systems to create false alarms.
 D. Control plane policers must be processed before a forwarding decision is made. 
E. Control plane policers require that adequate protocols overhead are factored in to allow protocol convergence. 

Question # 47

Which two foundational aspects of loT are still evolving and being worked on by the industry at large? (Choose two) 

A. WiFi protocols 
B. Regulatory domains 
C. Low energy Bluetooth sensors 
D. loT consortia 
E. Standards 

Question # 48

You are designing a network for a branch office. In order to improve convergence time, you are required to use the BFD feature Which four routing protocols can you use to facilitate this? (Choose four.) 

B. static 
 E. BGP 

Question # 49

Refer to the exhibit.

A. policy-based routing 
B. route summarization 
C. unequal-cost load balancing using variance 

Question # 50

Company XYZ has implemented policy-based routing in their network. Which potential problem must be kept in mind about network reconvergence and PBR? 

A. It can limit network scalability
 B. It can create microloops during reconvergence 
C. It increases convergence time. 
D. It reduces convergence time. 

Question # 51

A. In a large-scale network LSA replication by all ABRs can cause serious scalability issues 
B. Multiple ABRs reduce the CPU processing on each A6R due to splitting prefix advertisement
 C. In a large-scale network multiple ABRs can create microloops. 
D. Prefixes from the non-backbone area are advertised by one ABR to the backbone

Question # 52

You have been asked to design a high-density wireless network for a university campus. Which two principles would you apply in order to maximize the wireless network capacity? (Choose two.) 

A. Implement a four-channel design on 2.4 GHz to increase the number of available channels 
B. Choose a high minimum data rate to reduce the duty cycle. 
C. increases the number of SSlDs to load-balance the client traffic. 
D. Make use of the 5-GHz band to reduce the spectrum utilization on 2.4 GHz when dualband clients are used. 
E. Enable 802.11n channel bonding on both 2.4 GHz and 5 GHz to increase the maximum aggregated cell throughput. 

Question # 53

Which management category is not part of FCAPS framework? 

A. Configuration 
B. Security 
C. Performance 
D. Authentication
 E. Fault-management 

Question # 54

You have been tasked with designing a data center interconnect to provide business continuity You want to encrypt the traffic over the DCI using IEEE 802 1AE MACsec to prevent the deployment of any firewall or IPS. Which two interconnect technologies support MACsec? (Choose two.) 

B. MPLS Layer 3 VPN 

Question # 55

The network designer needs to use GLOP IP addresses in order to make them unique within their ASN Which multicast address range should be used? 

A. to 232 255.255.255 
B. H233.0.0 0 to 233.255.255 255 
C. 239000 to 239255255.255 
D. 224000 to 2240.0 255 

Question # 56

A. route summarization the ASBR interfaces facing the OSPF domain
 B. route summarization on the appropriate ASBRS. 
C. route summarization on the appropriate ABRS. 
D. route summarization on EIDRP routers connecting toward the ASBR 

Question # 57

Company XYZ asks for design recommendations for Layer 2 redundancy. The company wants to prioritize fast convergence and resiliency elements. In the design. Which two technologies are recommended? (Choose two.) 

A. Design MLAG/MC-LAG into the network wherever possible.
B. Configure DHCP snooping on the switches. 
C. Use root guard. 
D. Use BPDU guard. 
E. Use UniDirectional Link Detection. 

Question # 58

A. Prepend AS path for the network and set it for neighbor in AS 200.
 B. Use extended community for the network, not advertising it to the bi-lateral peer. 
C. Use local preference on R1 for the networks that AS 500 advertises to AS 111. 
D. Set higher MED for neighbor in AS 100 to influence incoming traffic for the 91. 7.0.0/16 network. 

Question # 59

Organizations that embrace Zero Trust initiatives ranging from business policies to technology infrastructure can reap business and security benefits. Which two domains should be covered under Zero Trust initiatives? (Choose two) 

A. workload 
B. work domain 
C. workplace 
D. workgroup 
E. workspace 

Question # 60

You want to mitigate failures that are caused by STP loops that occur before UDLD detects the failure or that are caused by a device that is no longer sending BPDUs. Which mechanism do you use along with UDLD? 

A. Root guard 
B. BPDU guard 
C. Loop guard 
D. BPDU filtering 

Question # 61

A healthcare customer requested that SNMP traps must be sent over the MPLS Layer 3 VPN service. Which protocol must be enabled? 

B. Syslog 
C. Syslog TLS 
D. SNMPv2 

Question # 62

How must the queue sizes be designed to ensure that an application functions correctly? 

A. Each individual device queuing delay in the chain must be less than or equal to the application required delay. 
B. The queuing delay on every device in the chain must be exactly the same to the application required delay. 
C. The default queue sizes are good for any deployment as it compensates the serialization delay. 
D. The sum of the queuing delay of all devices plus serialization delay in the chain must be less than or equal to the application required delay. 

Question # 63

According to the CIA triad principles for network security design, which principle should be priority for a Zero Trust network? 

A. requirement for data-in-motion encryption and 2FA authentication 
B. requirement for data-at-rest encryption foe user identification within the VPN termination hardware 
C. categorization of systems, data, and enterprise BYOD assets that are connected to network zones based on individual privacy needs 
D. ensuring that authorized users have high-availability system access from defined zones to defined systems or zones 

Question # 64

Company XYZ needs advice in redesigning their legacy Layer 2 infrastructure. Which technology should be included in the design to minimize or avoid convergence delays due to STP or FHRP and provide a loop-free topology? 

A. Use switch clustering in the access layer. 
B. Use switch clustering in the core/distribution layer. 
C. Use spanning-tree PortFast. 
D. Use BFD. 

Question # 65

A European government passport agency considers upgrading its IT systems to increase performance and workload flexibility in response to constantly changing requirements. The budget manager wants to reduce capital expenses and IT staff and must adopt the lowestcost technology. Which technology choice is suitable? 

A. on premises 
B. private cloud 
C. public cloud 
D. hybrid cloud 

Question # 66

A customer investigates connectivity options for a DCI between two production data centers to aid a large-scale migration project. The solution must provide a single 10G connection between locations and be able to run its own varying QoS profiles without service provider interaction based on the migration stages. All connectivity methods are at 10 Gbps. Which transport technology costs the least if the connectivity is required for just one year?

A. MPLS wires only 
B. CWDM over dark fiber 
C. DWDM over dark fiber
 D. Metro Ethernet 

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