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?

1. A. STP
2. B. fate sharing
3. C. OSPF LFA
4. D. BFD
5. E. flex links

Correct Answer: D

Refer to the exhibit.

Traffic was equally balanced between Layer 3 links on core switches SW1 and SW2 before an introduction of the new video server in the network. This video server uses multicast to send video streams to hosts and now one of the links between core switches is over utilized Which design solution solves this issue?

1. A. Add more links between core switches.
2. B. Aggregate links Layer 2 link aggregation.
3. C. Apply a more granular load- balancing method on SW1.
4. D. Apply a more granular load-balancing method on SW2.
5. E. Filter IGMP joins on an over -utilized link.

Correct Answer: B

Drag and drop the design characteristics from the left onto the correct network filter techniques on the right. Not all options are used.

Solution:


Does this meet the goal?

1. A. Yes
2. B. No

Correct Answer: A

What is a characteristic of a secure cloud architecture model?

1. A. limited access to job function
2. B. dedicated and restricted workstations
3. C. multi-factor authentication
4. D. software-defined network segmentation

Correct Answer: C

If the desire is to connect virtual network functions together to accommodate different types of network service connectivity what must be deployed?

1. A. bridging
2. B. service chaining
3. C. linking
4. D. daisy chaining
5. E. switching

Correct Answer: B
Service chaining is the technique of connecting virtual network functions together to provide different types of network service connectivity. Service chaining uses software-defined networking (SDN) programmability to create a chain of connected network services, such as firewalls, load balancers, NAT, and intrusion protection. Service chaining can automate the provisioning of network applications that have different characteristics and requirements, such as security, latency, or quality of service (QoS). Service chaining can also optimize the use of network resources and improve application performance by using SDN analytics and performance tools to select the best available network paths and avoid network congestion. Service chaining is being used in many SDN and network functions virtualization (NFV) use cases and deployments, such as data centers, carrier networks, and virtual customer edge123. References:
1: What is Network Service Chaining or Service Function Chaining - SDxCentral
2: On service chaining using Virtual Network Functions in Network-enabled Cloud systems | IEEE Conference Publication | IEEE Xplore
3: Service function chaining - Gini5