400-007 Online Practice Questions and Answers

Two routers R1 and R2 are directly connected through an Ethernet link. Both routers are running OSPF over the Ethernet link and OSPF has been registered with BFD. R1 has been set up to transmit BFD at a 50 ms interval, but R2 can receive only at a 100 ms rate due to platform limitations. What does this mean?

A. After the initial timer exchange. R2 sets its transmission rate to the R1 Desired Min TX interval

B. After the initial timer exchange. R1 sets its transmission rate to the R2 Required Min RX interval

C. Timers renegotiate indefinitely, so the timer exchange phase never converges

D. R2 sets the P-bit on all BFD control packets until R2 sends a packet with the F-bit set

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. Enable unicast heartbeat messages to be periodically exchanged between MEPs

B. Enable Connectivity Fault Management on the SP switches

C. Use upward maintenance endpoints on the SP switches

D. Forward E-LMI PDUs over VPLS

E. Forward LLD PDUs over the VPLS

Which design solution reduces the amount of IGMP state in the network?

A. IGMP filtering

B. IGMPv3 with PIM-SSM

C. multiple multicast domains

D. one multicast group address thorough network regardless of IGMP version

A small organization of 20 employees is looking to deliver a network design service for modernizing customer networks to support advanced solutions.

1.

Project scope and weekly progress should be visualized by the management.

2.

Always consider feedback and make changes accordingly during the project.

3.

Should consider flexibility to change scope at the point of time.

Which project methodology meets the requirements and have the least impact on the outcome?

A. Scrum

B. LEAN

C. Kanban

D. Six-Sigma

Which tool automates network implementation activities and shortens the implementation lifecycle?

A. LISP

B. Java

C. Conclusion

D. Python

An international media provider is an early adopter of Docker and micro services and is using an open-source homegrown container orchestration system. A few years ago, they migrated from on-premises data centers to the cloud Now they are faced with challenges related to management of the deployed services with their current homegrown orchestration system.

Which platform is well-suited as a state-aware orchestration system?

A. Puppet

B. Kubemetes

C. Ansible

D. Terraform

An IT service provider is upgrading network infrastructure to comply with PCI security standards. The network team finds that 802.1X and VPN authentication based on locally- significant certificates are not available on some legacy phones.

Which workaround solution meets the requirement?

A. Replace legacy phones with new phones because the legacy phones will lose trust if the certificate is renewed.

B. Enable phone VPN authentication based on end-user username and password.

C. Temporarily allow fallback to TLS 1.0 when using certificates and then upgrade the software on legacy phones.

D. Use authentication-based clear text password with no EAP-MD5 on the legacy phones.

Which two protocols are used by SDN controllers to communicate with switches and routers? (Choose two.)

A. NetFlash

B. NetFlow

C. Open vSwitch Database

D. OpenFlash

E. OpenFlow

Refer to the exhibit.

Company XYZ must design a DMVPN tunnel between the three sites Chicago is going to act as the NHS and the company wants DMVPN to detect peer endpoint failures.

Which technology should be used m the design?

A. VPLS

B. IP SLA

C. GRE

D. L2TPv3

The SD-WAN architecture is composed of separate orchestration management, control, and data planes.

Which activity happens at the orchestration plane?

A. automatic onboarding of the SD-WAN routers into the SD-WAN overlay

B. decision-making process on where traffic flows

C. packet forwarding

D. central configuration and monitoring