The Most Up-to-date Guide To 400-007 Answers

NEW QUESTION 1
When designing a WAN that will be carrying real-time traffic, what are two important reasons to consider serialization delay? (Choose two )

• A. Serialization delays are invariable because they depend only on the line rate of the interface
• B. Serialization delays are variable because they depend on the line rate of the interface and on thetype of the packet being serialized.
• C. Serialization delay is the time required to transmit the packet on the physical media.
• D. Serialization delays are variable because they depend only on the size of the packet beingserialized
• E. Serialization delay depends not only on the line rate of the interface but also on the size of thepacket

Answer: BD

NEW QUESTION 2
Which mechanism provides Layer 2 fault isolation between data centers?

• A. fabric path
• B. OTL
• C. advanced VPLS
• D. LISP
• E. TRILL

Answer: D

NEW QUESTION 3
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 SL
• C. andIPsec for secure transport over the public Internet.
• D. Both technologies should be use
• E. Each should be used to back up the other one; where theprimary links are MPLS, the internet should be used as a backup link with IPsec (and vice versa).
• F. MPLS meets all these requirements and it is more reliable than using the Interne
• G. It is widelyused with defined best practices and an industry standard.

Answer: A

NEW QUESTION 4
While reviewing an existing network design, you are discussing the characteristics of different STP versions.
Which protocol minimizes unicast flooding during a Topology Change Notification in a Layer 2 switched network with many VLANs?

• A. PVRSTP
• B. MST
• C. STP
• D. PVSTP+

Answer: A

NEW QUESTION 5
Which design benefit of PortF ast is true?

• A. PortFast does not generate a spanning tree topology change hen a station on a port is connectedor disconnected
• B. PortFast disables spanning tree on the port, which puts the port into the forwarding stateimmediately after it is connected
• C. PortFast allows small, unmanaged switches to be plugged into ports of access switches withoutrisking switch loops
• D. PortFast detects one-way communications on the physical port, which prevents switch loops
• E. PortFast prevents switch loops that are caused by a unidirectional point to point link condition onRapid PVST+ and MST
• F. PortFast prevents switched traffic from traversing suboptimal paths on the network

Answer: A

NEW QUESTION 6
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

Answer: BE

NEW QUESTION 7
SD-WAN can be used to provide secure connectivity to remote offices, branch offices, campus networks, data centers, and the cloud over any type of IP-based underlay transport network. Which two statements describe SD WAN solutions? (Choose two.)

• A. SD-WAN networks are inherently protected against slow performance.
• B. Control and data forwarding planes are kept separate.
• C. Improved operational efficiencies result In cost savings.
• D. Solutions include centralized orchestration, control, and zero-touch provisioning.
• E. Solutions allow for variations of commodity and specialized switching hardware.

Answer: BD

NEW QUESTION 8
In an OSPF network with routers connected together with Ethernet cabling, which topology
typically takes the longest to converge?

• A. partial mesh
• B. full mesh
• C. ring
• D. squared
• E. triangulated

Answer: B

NEW QUESTION 9
Refer to the exhibit. AJI links are P2P Layer 3. A high availability application is synchronizing data between host A and host B.

To increase chance of delivery the same data is sent twice from host A on two different NICs toward the two NICs on host B.
Which solution must be deployed in the network to ensure that any failure in the network does not trigger data loss on host B?

• A. EIGRP with feasible successors
• B. BFD
• C. IP Fast Reroute
• D. Static routes

Answer: C

NEW QUESTION 10
Which option is a fate-sharing characteristic in regards to network design?

• A. A failure of a single element causes the entire service to fail
• B. It protects the network against failures in the distribution layer
• C. It acts as a stateful forwarding device
• D. It provides data sequencing and acknowledgment mechanisms

Answer: A

NEW QUESTION 11
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?

• A. EIGRP
• B. IS-IS
• C. OSPF
• D. BGP

Answer: B

NEW QUESTION 12
Which BGP feature provides fast convergence?

• A. BGP PIC |
• B. BGP-EVPN
• C. BGP FlowSpec
• D. BGP-LS

Answer: A

NEW QUESTION 13
Which encoding format does cisco ios XE software support for NETCONF?

• A. It supports HTML encoding for NETCONF
• B. It supports YAML encoding for NETCONF
• C. It supports XML encoding for NETCONF
• D. It supports JSON encoding for NETCONF

Answer: C

NEW QUESTION 14
Company XYZ wants to improve the security design of their network to include protection from reconnaissance and DoS attacks on their sub interfaces destined toward next hop routers.
Which technology can be used to prevent these types of attacks?

• A. MPP
• B. CPPr
• C. CoPP
• D. DPP

Answer: B

NEW QUESTION 15
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

Answer: C

NEW QUESTION 16
As part of a new network design documentation, you are required to explain the reason for choosing cisco FabricPath for Layer 2 loop avoidance.
Which two elements help Cisco FabricPath mitigate Layer 2 loops if they happen in the Layer 2 MP network? (Choose two)

• A. MAC tunneling
• B. IS-IS multipath
• C. RPF check
• D. TTL header

Answer: CD

NEW QUESTION 17
You want to split an Ethernet domain in two.
Which parameter must be unique in this design to keep the two domains separated?

• A. VTP domain
• B. VTP password
• C. STP type
• D. VLAN ID

Answer: D

NEW QUESTION 18
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