Cisco 400-007 Cisco Certified Design Expert Online Training
Cisco 400-007 Online Training
The questions for 400-007 were last updated at Oct 19,2025.
- Exam Code: 400-007
- Exam Name: Cisco Certified Design Expert
- Certification Provider: Cisco
- Latest update: Oct 19,2025
Refer to the exhibit.
For Company XYZ Bangkok is using ECMP to reach the 172 20 2 0/24 network. The company wants a design that would allow them to forward traffic from 172 16 2 0/24 toward 172 20 2 0/24 via the Singapore router as the preferred route. The rest of the traffic should continue to use ECMP.
Which technology fulfills this design requirement?
- A . policy-based routing
- B . route summarization
- C . unequal-cost load balancing using variance
- D . LFA
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
Company XYZ is running BGP as their routing protocol. An external design consultant recommends that TCP path MTU discovery be enabled.
Which effect will this have on the network?
- A . It will enhance the performance of TCP-based applications.
- B . It will increase the convergence time.
- C . It will improve the convergence time.
- D . It will create a loop free path.
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?
- A . Add more links between core switches.
- B . Aggregate links Layer 2 link aggregation.
- C . Apply a more granular load- balancing method on SW1.
- D . Apply a more granular load-balancing method on SW2.
- E . Filter IGMP joins on an over -utilized link.
What is a description of a control plane action?
- A . de-encapsulating and re-encapsulating a packet in a data-link frame
- B . matching the destination MAC address of an Ethernet frame to the MAC address table
- C . matching the destination IP address of an IP packet to the IP routing table
- D . hosts locating routers that reside on attached links using the IPv6 Neighbor Discover Protocol
While designing a switched topology, in which two options is UplinkFast recommended? (Choose two)
- A . when switches of different spanning-tree types are connected (for example. 802.1d connecting to 802.1w)
- B . on distribution layer switches
- C . when hello timers are changed to more aggressive values
- D . on access layer switches
- E . on the core switches
Company XYZ runs OSPF in their network. A design engineer decides to implement hot-potato routing architecture.
How can this implementation be achieved?
- A . Enable iBGP and apply prepend to ensure all prefixes will have the same length of the AS path attribute value.
- B . Redistribute the external prefixes onto OSPF and ensure the total metric calculation includes only the ext value and the value is the same in all ASBRs.
- C . Enable OSPF load-balancing over unequal cost path.
- D . Redistribute the external prefixes onto OSPF and ensure that the total metric calculation includes external internal values.
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
DRAG DROP
Drag and drop the optical technology design characteristics on the left to the correct optical technologies on the right. Not all options are used
SDN emerged as a technology trend that attracted many industries to move from traditional networks to SDN.
Which challenge is solved by SDN for cloud service providers?
- A . need for intelligent traffic monitoring
- B . exponential growth of resource-intensive application
- C . complex and distributed management flow
- D . higher operating expense and capital expenditure
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