What statement describes the application layer as defined in the software-defined networking architecture?

1. A. This layer is responsible for collecting the network status such as network usage and topology.
2. B. This layer contains programs that communicate their desired network behavior to controllers.
3. C. This layer is responsible for handling packets based on the rules provided by the controller.
4. D. This layer processes the instructions and requirements sent by networking components.

Correct Answer: B

Which two statements explain the operation of BFD asynchronous mode? (Choose two )

1. A. BFD asynchronous mode with echo packets combines the control packets and echo packets into a single packet.
2. B. BFD asynchronous mode without echo packets uses control packets, and BFD asynchronous mode with echo packets does not.
3. C. BFD asynchronous mode with and without echo packets use control packets.
4. D. BFD asynchronous without echo packets has control packets sent back to the originating router, which echoes the control packet to detect failures.
5. E. BFD asynchronous mode with echo packets uses separate control packets and echo packets.

Correct Answer: CE

Company XYZ is designing their network using the three-layer hierarchical model. At which layer must the QoS design classify or mark the traffic?

1. A. access
2. B. core
3. C. collapsed core
4. D. distribution

Correct Answer: A

A service provider hires you to design its new managed CE offering to meet these requirements
• The CEs cannot run a routing protocol with the PE
• Provide the ability for equal or unequal ingress load balancing in dual-homed CE scenarios.
• Provide support for IPv6 customer routes
• Scale up to 250.000 CE devices per customer.
• Provide low operational management to scale customer growth.
• Utilize low-end (inexpensive) routing platforms for CE functionality. Which tunneling technology do you recommend?

1. A. FlexVPN
2. B. point-to-point GRE
3. C. DMVPN
4. D. LISP

Correct Answer: D

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?

1. A. Replace legacy phones with new phones because the legacy phones will lose trust if the certificate is renewed.
2. B. Enable phone VPN authentication based on end-user username and password.
3. C. Temporarily allow fallback to TLS 1.0 when using certificates and then upgrade the software on legacy phones.
4. D. Use authentication-based clear text password with no EAP-MD5 on the legacy phones.

Correct Answer: B