Pass 300-420 Exam - Real Test Engine PDF with 151 Questions
Get New 300-420 Certification Practice Test Questions Exam Dumps
NEW QUESTION 79
When provisioning bandwidth for an IP telephony network, which elements are unique to an IP telephony call?
(Choose two.)
- A. voice stream
- B. IGMP packets
- C. routing protocol packets
- D. speed of the segment to the telephone
- E. call-control signaling
Answer: A,E
Explanation:
Bandwidth provisioning for an IP telephony call consists of the voice stream traffic and the call control traffic.
These elements are unique to an IP telephony call.
The network infrastructure should be examined to see if the required bandwidth exists to support the voice and call-control applications. The sum of the bandwidth necessary for each major application, including voice, video, and data, should not exceed 75% of the total available bandwidth for each link. Voice traffic can be characterized as:
Smooth
Benign
Drop sensitive
Delay sensitive
Voice packets are typically around 60 to 120 bytes in size. For good voice quality, packet loss should be less than 1 percent and delay should be no more than 150 ms.
The IP telephony voice call-control procedures also generate traffic. The call control procedures are in the areas of call setup, maintenance, redirect, and tear down. There are special protocols such as H.323 and Media Gateway Control Protocol (MGCP) that handle these procedures.
Voice applications are delay-sensitive. Speech is sampled by voice processors referred to as a codec (coder/ decoder). Then the digitized voice-sample outputs of the codecs are sent into the network towards the receiver at regular intervals in real-time transport protocol (RTP) packets. If these packets containing the voice samples are delayed for any reason behind other data traffic, the quality of the voice conversation suffers.
The transportation of these voice applications in RTP packets through the IP network handled by H.323 protocols and devices is referred to as Voice over IP (or VoIP for short).
The following are other network and design considerations besides bandwidth relating to IP telephony infrastructure support:
Determine if the cabling plant can support the IP telephony equipment.
Determine if the switch hardware can supply power to attached IP telephony equipment or if additional hardware is required.
Ensure that infrastructure supports priority end-to-end VLANs and QoS networking.
Internet Group Management Protocol (IGMP) is used for managing the membership of IP multicast groups and is not an element unique to an IP telephony call.
Routing protocol packets (RIP, OSPF, and EIGRP) are used by routers to share routing information, and are not elements unique to an IP telephony call.
The speed of the segment to the telephone is important to VoIP, but that is not an element unique to an IP telephony call.
Objective:
Layer 2 Technologies
Sub-Objective:
Configure and verify VLANs
References:
Cisco > Support > Technology Support > Voice > Telephony Signaling
NEW QUESTION 80
Which two border nodes are available in the Cisco SD-Access architecture? (Choose two.)
- A. anywhere border
- B. edge border
- C. intermediate border
- D. extended border
- E. internal border
Answer: A,E
NEW QUESTION 81
A branch office has a primary L3VPN MPLS connection back to the main office and an IPSEC VPN tunnel that serves as backup. Which design ensures that data is sent over the backup connection only if the primary MPLS circuit is down?
- A. Use static routes tied to an IP SLA to prefer the primary path while a floating static route points to the backup connection.
- B. Use BGP with the multipath feature enabled to force traffic via the primary path when available.
- C. Use EIGRP to establish a neighbor relationship with the main office via L3VPN MPLS and the IPSEC VPN tunnel.
- D. Use OSPF with a passive-interface
Answer: A
NEW QUESTION 82 
Refer to the exhibit. Which two solutions maximize the use of the links between the core and distribution layers? (Choose two.)
- A. use an IGP
- B. use multiple unequal-cost links
- C. use HSRP
- D. use multiple equal-cost links
- E. use RPVSTP+
Answer: A,D
Explanation:
Section: Advanced Enterprise Campus Networks
NEW QUESTION 83
Which nonproprietary mechanism can be used to automate rendezvous point distribution in a large PIM domain?
- A. BSR
- B. Embedded RP
- C. Static RP
- D. Auto-RP
Answer: A
NEW QUESTION 84
Refer to the exhibit.
An engineer must optimize the traffic flow of the network. Which change provides a more efficient design between the access and the distribution layer?
- A. Add a link between access switch A and access switch B
- B. Create an EtherChannel link between distribution switch A and distribution switch B
- C. Reconfigure the distribution switch A to become the HSRP Active
- D. Change the link between distribution switch A and distribution switch B to be a routed link
Answer: C
NEW QUESTION 85
When IPsec VPNs are designed, what is a unique requirement if support for IP Multicast is required?
- A. additional bandwidth for headend
- B. IPsec forwarding using transport mode
- C. encapsulation of traffic with GRE or VTI
- D. IPsec forwarding using tunnel mode
Answer: C
Explanation:
Section: WAN for Enterprise Networks
Explanation/Reference:
NEW QUESTION 86
An engineer is looking for a standards-driven YANG model to manage a multivendor network environment.
Which model must the engineer choose?
- A. IETF
- B. IEEE NETCONF
- C. OpenConfig
- D. Native
Answer: A
Explanation:
Section: Automation
NEW QUESTION 87
Drag and drop the characteristics from the left onto the Yang model they describe on the right.
Select and Place:
Answer:
Explanation:
NEW QUESTION 88
An engineer must design a scalable QoS architecture that allows the separation of the traffic into classes on predefined business requirements. The design must also utilize the differentiated services code points as the QoS priority descriptor value and support at least 10 levels of classification. Which QoS technology should the engineer include in the design?
- A. DiffSery
- B. RSVP
- C. Best Effort
- D. InterServ
Answer: A
NEW QUESTION 89
Refer to the exhibit. An architect is designing a BGP solution to connect a remote branch to a service provider. There are several prefixes within the branch that the company does not want to be advertised to the internet. Which solution should the architect use to accomplish this?
- A. Implement the NOPEER community.
- B. Set the BGP Internet community for all prefixes.
- C. Use the BGP No-Advertise community for the prefixes to exclude.
- D. Attach the No-Export community with the prefixes to exclude
Answer: D
NEW QUESTION 90
When vEdge router redundancy is designed, which FHRP is supported?
- A. HSRP
- B. OMP
- C. GLBP
- D. VRRP
Answer: D
Explanation:
Section: Advanced Enterprise Campus Networks
NEW QUESTION 91
Refer to the exhibit. An engineer is designing an OSPF network for a client. Requirements dictate that the routers in Area 1 should receive all routes belonging to the network, including EIGRP, except the ones originated in the RIP domain. Which action should the engineer take?
- A. Make area 1 a NSSA.
- B. Make the area 1 routers part of area 0.
- C. Make area 1 a standard OSPF area.
- D. Make area 1 a stub.
Answer: A
Explanation:
NEW QUESTION 92
How do endpoints inside an SD-Access network reach resources outside the fabric?
- A. SD-Access transit links are used to transport encapsulated traffic from one fabric to another
- B. A fabric edge is used to de-encapsulate VXLAN traffic to normal IP traffic then transported over the outside network
- C. Fabric borders use VRFs to map VNs to VRFs
- D. a VRF fusion router is used to map resources in one VN to another VN
Answer: B
NEW QUESTION 93
Drag and drop the characteristics from the left onto the configuration protocols they describe on the right.
Answer:
Explanation:
NEW QUESTION 94
A network solution is being designed for a company that connects to multiple Internet service providers. Which Cisco proprietary BGP path attribute will influence outbound traffic flow?
- A. Weight
- B. Local Preference
- C. MED
- D. Community
- E. AS Path
Answer: A
Explanation:
Section: Advanced Addressing and Routing Solutions
NEW QUESTION 95
A company is using OSPF between its HQ location and a branch office. HQ is assigned area 0 and the branch office is assigned area 1. The company purchases a second branch office, but due to circuit delays to HQ, it decides to connect the new branch office to the creating branch office as a temporary measure. The new branch office is assigned area 2. Which OSPF configuration enables all three locations to exchange routes?
- A. A virtual link must be configured between the new branch office and HQ
- B. The existing branch office must be configured as a stub area
- C. A sham link must be configured between the new branch office and HQ
- D. The new branch office must be configured as a stub area
Answer: A
NEW QUESTION 96 
Refer to the exhibit. An architect must design a solution to connect the network behind R3 with the EIGRP network. Which mechanism should be included to avoid routing loops?
- A. split horizon
- B. route tags
- C. down bit
- D. summarization
Answer: B
Explanation:
Section: Advanced Addressing and Routing Solutions
NEW QUESTION 97 
Refer to the exhibit. An architect is designing a BGP solution to connect a remote branch to a service provider.
There are several prefixes within the branch that the company does not want to be advertised to the internet.
Which solution should the architect use to accomplish this?
- A. Implement the NOPEER community.
- B. Set the BGP Internet community for all prefixes.
- C. Use the BGP No-Advertise community for the prefixes to exclude.
- D. Attach the No-Export community with the prefixes to exclude
Answer: D
NEW QUESTION 98
In an SD-WAN architecture, which methods are used to bootstrap a vEdge router?
- A. DHCP options or manual configuration
- B. vManage or DNS records
- C. DNS records or DHCP options
- D. ZTP or manual configuration
Answer: D
NEW QUESTION 99
Which design consideration must be made when dual WAN Edge routers are deployed at a branch site?
- A. Use BGP AS-path prepending to influence egress traffic and use MED to influence ingress traffic from the branch.
- B. Configure BFD between WAN Edge routers to detect sub-second link failures.
- C. HSRP priorities must match the OMP routing policy to prefer one WAN Edge over the other.
- D. Traffic must be symmetrical as it egresses the WAN Edges and returns from remote sites for DPI to function properly.
Answer: A
Explanation:
Section: WAN for Enterprise Networks
NEW QUESTION 100
Which two tasks must you perform to configure DHCP snooping on a device? (Choose two.)
- A. Enable DHCP snooping globally
- B. Enable VRF support for the DHCP relay agent
- C. Enable DHCP snooping on the VLAN
- D. Enable DHCP option 82
- E. Enable DHCP packet validation on the device
Answer: A,C
Explanation:
Explanation/Reference: https://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nx-os/security/configuration/ guide/sec_nx-os-cfg/sec_dhcpsnoop.html
NEW QUESTION 101
Drag and drop the characteristics from the left onto the YANG modules they describe on the right. Not all options are used.
Answer:
Explanation:
NEW QUESTION 102 
Refer to the exhibit. Customers report low video quality and delays when having point-to-point telepresence video calls between the two locations. An architect must optimize a design so that traffic follows the same path for egress and ingress traffic flows. Which technique optimizes the design?
- A. Configure route leaking on the router in area 2.
- B. Configure route filter on the router in area 4.
- C. Configure the high metric on the router in area 4.
- D. Configure route leaking on the router in area 1.
Answer: C
NEW QUESTION 103
......
How to Pass 300-420 Exam?
The Cisco 300-420 test is a very diligently-designed exam that touches on almost every aspect of Cisco enterprise networking, routing & switching, and designing concepts. Securing the bare minimum passing marks in this exam is not an easy job as it demands more than commitment. All in all, there should be an army of reliable study resources to make a candidate skilled enough to pass the final exam. So, here is a list of some trustworthy resources that have proved beneficial for applicants to have a better hold over exam objectives:
#1 - Designing Cisco Enterprise Networks (ENSLD) v1.0 Course
Managed by Cisco and its associated partners, it is the official training course that the test-takers can join to taste success in the Cisco 300-420 exam. This course, in particular, has been designed by Cisco experts and helps candidates gain the latest information about enterprise network design and its related concepts. To know more, such a training alternative is delivered via classroom and virtual method and is 5 days long. In each delivery mode, candidates will be able to learn via lectures, self-study, and practical sessions. Additionally, taking up this course not only eases down the Cisco 300-420 exam journey but also helps a candidate earn 40 CE credits toward recertification. This way, it can help you reap dual benefits. And when it comes to its target audience, networking design engineers, network engineers, and system administrators are the ideal candidates for such a training course. While there are no official prerequisites to enroll for such a test, it is suggested that applicants should have basic computing and internet understanding. On top of these, a clear understanding of routing and switching fundamentals along with clarity over basic wireless networking concepts and terminology makes the whole course journey way more simplified.
300-420 Exam Dumps - PDF Questions and Testing Engine: https://www.examcollectionpass.com/Cisco/300-420-practice-exam-dumps.html
Real 300-420 Exam Dumps Questions Valid 300-420 Dumps PDF: https://drive.google.com/open?id=19VPqU3kMclAAevTrxXPDA_j_fUiDbrGb