Changing the Concept of 300-420 Exam Preparation 2025 [Q205-Q219]

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Changing the Concept of 300-420 Exam Preparation 2025

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WAN for Enterprise Networks

This topic focuses on 20% of the overall content and validates the applicants’ competence in the following areas:

Designing site-to-site VPN, such as DMVPN, MPLS L3 VPN, L2 VPN, IPsec, GET VPN & GRE;
Designing high availability for enterprise WAN, covering failover, multihomed, backup connectivity, as well as single-homed;
Explaining the architecture for Cisco SD-WAN, including management plane orchestration plan, data plane, security, control plane, provisioning, and on-boarding;
Explaining the design considerations for Cisco SD-WAN (LAN design, control plane design, overlay design, scalability, redundancy, high availability, security design, multicast & QoS over the SD-WAN fabric).
Comparing the connectivity options for WAN, including MPLS L3 VPN, L2 VPN, 4G/5G, DWDM, Metro Ethernet, and SD-WAN customer edge;

Cisco 300-420 exam is a crucial certification exam for network engineers, architects, and designers who are responsible for designing and implementing complex enterprise networks. Designing Cisco Enterprise Networks certification validates your skills and knowledge in enterprise network design principles and best practices, as well as your expertise in advanced routing and switching technologies, network security, wireless technologies, and network automation.

NEW QUESTION 205
Which type of rendezvous point deployment is standards-based and supports dynamic RP discovery?

bootstrap router

Anycast-RP

Auto-RP

static RP

NEW QUESTION 206
Drag and drop the description from the left onto the corresponding WAN connectivity types and categories on the right.

NEW QUESTION 207
Drag and Drop Question
Drag and drop the Cisco SD-WAN components from the left onto their definitions on the right.

NEW QUESTION 208
Refer to the exhibit.

An architect must design an IGP solution for an enterprise customer. The design must support:
Physical link flaps should have minimal impact.
Access routers should converge quickly after a link failure.
Which two ISIS solutions should the architect include in the design? (Choose two.)

Use BGP to IS-IS redistribution to advertise all Internet routes in the Level 1 area.

Advertise the IS-IS interface and loopback IP address toward the Internet and data center.

Reduce SPF and PRC intervals to improve convergence time.

Configure all access and aggregate routers to establish Level 1 / Level 2 adjacencies across the network.

Configure access routers to establish a Level 1 adjacency and aggregate routers to establish a Level 1 /

Level 2 adjacency.

NEW QUESTION 209
Which two best practices must be followed when designing an out-of-band management network? (Choose two.)

Enforce access control

Facilitate network integration

Back up data using the management network

Ensure that the management network is a backup to the data network

Ensure network isolation

https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Security/SAFE_RG/SAFE_rg/chap9.html

NEW QUESTION 210
What is the purpose of an edge node in an SD-Access network fabric?

Edge nodes identify and authenticate endpoints and register endpoint information with control plane nodes.

Edge nodes track endpoint IDs to location mappings, along with IPv4, IPv6, or MAC addresses.

Edge nodes are the gateway between the fabric domain and network outside of the fabric.

Edge nodes resolve lookup requests from edge and border nodes to locate destination endpoint IDs.

NEW QUESTION 211
An engineer is working for a large cable TV provider that requires multiple sources streaming video on different channels using multicast with no rendezvous point. Which multicast protocol meets these requirements?

PIM-SM

PIM-SSM

any-source multicast

BIDIR-PIM

Explanation
PIM-SSM is suitable for when well-known sources exist within the local PIM domain and for broadcast applications. Also, PIM-SSM eliminates the RPs and shared trees

NEW QUESTION 212
In what mode does an LWAPP-enabled access point operate?

lightweight mode

autonomous mode

WGB

ad hoc mode

Lightweight access point protocol (LWAPP)-enabled access points operate in lightweight mode. LWAPP is a protocol used to allow centralized management of APs. The management components are removed from the APs, and a WLAN controller provides a single point of management. This controller coordinates WLAN access, managing the load on the APs and user movement between APs. Upon starting, an LWAPP-enabled access point must obtain an IP address. It can then discover the controller using DHCP, DNS, or a subnet broadcast. When multiple wireless controllers are detected by an AP, it chooses to associate with the controller that has the fewest existing associated APs.
Individually configured APs that operate without central management are operating in autonomous mode. This would be the opposite of lightweight mode, which is made possible by LWAPP. Autonomous access points can be upgraded to lightweight. If they are upgraded, they will only function in conjunction with a WLAN controller.
Moreover, when an autonomous access point is upgraded to lightweight, the console port only provides read access to the unit.
Characteristics that autonomous and lightweight access points have in common:
Both support Power over Ethernet (PoE)
Both can use a Cisco Secure Access Control server (ACS) for security
A wireless gateway bridge (WGB) is used to connect a computer without a wireless network card to a wireless network, but not separate WLANs. The WGB can connect up to eight computers to a WLAN. The WGB connects to the root AP through a wireless interface.
Ad hoc is a WLAN mode used for peer-to-peer connectivity. Ad hoc mode allows wireless-enabled computers to communicate with each other without having an AP involved.
Objective:
Layer 2 Technologies
Sub-Objective:
Configure and verify other LAN switching technologies
References:
Cisco > Support > Product Support > Wireless > Cisco Aironet 1200 Series > Reference Guides > Technical References > Upgrading Autonomous Cisco Aironet Access Points to Lightweight Mode Cisco > Support > Technology Support > Wireless/Mobility > Wireless, LAN (WLAN) > Design > Design Technotes > Cisco Wireless Devices Association Matrix

NEW QUESTION 213
Which two Cisco ISE use cases typically involve the highest level of implementation complexity?
(Choose two.)

Asset visibility

Device management

Software-defined segmentation

Software-defined access

Guest and wireless access

NEW QUESTION 214
A large chain of stores currently uses MPLS-based T1 lines to connect their stores to their data center. An architect must design a new solution to improve availability and reduce costs while keeping these considerations in mind:
– The company uses multicast to deliver training to the stores.
– The company uses dynamic routing protocols and has implemented QoS.
– To simplify deployments, tunnels should be created dynamically on the hub when additional stores open.
Which solution should be included in this design?

VPLS

GET VPN

DMVPN

IPsec

DMVPN can be run over MPLS, with all the benefits of QoS. Under the hood, DMVPN is GRE with IPSEC, and GRE will deliver multicast.

NEW QUESTION 215
Which two overlay network design considerations must be made for a Cisco SD-Access network? (Choose two.)

LAN automation for deployment

Layer 3 to the access design

Reduce subnets and simplify DHCP management

Dedicated IGP process for the fabric

Avoid overlapping IP subnets

Explanation
https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html#Overlay_Network_

NEW QUESTION 216
Refer to the exhibit. A network engineer must design a BGP solution based on:
– The route reflector must have one or more direct physical connections to the core routers (R3 and R4).
– The route reflector must have full redundancy and avoid a single
point of failure.
– R2 to R1 link utilization is 90%, and the remaining links are less
than 50% utilized.
Which two solutions must the design include? (Choose two.)

Configure R1 to be a client of R2 and R4.

Configure R5 to be a client of R3 and R4

Configure R2 to be a client of R1 and R4.

Configure R3 to be a client of R2 and R4.

Configure R4 to be a client of R1 and R3.

We want to try and centralize our Route Reflector, in this example all routers qualify to be Route Reflectors because they have at least 1 link connected to R3/R4 the core Routers.
– We want to try avoid link between R1 and R2 because it’s caping at 90%.
– Answer A uses the link that’s 90%
– Answer B is not a centralize location, R5 is way down there.
– Answer C utilize the link that’s at 90%
– D & E both have redundancy and do not use the link that has 90% and it’s centralized.

NEW QUESTION 217
Which two functions is the Cisco SD-Access Border Node responsible for? (Choose two.)

Map users to a virtual network

Advertise EID subnets

Route and transport IP traffic

Act as an anycast Layer 3 gateway

Act as a LISP proxy tunnel router

NEW QUESTION 218
In an SD-WAN architecture, which methods are used to bootstrap a vEdge router?

DHCP options or manual configuration

vManage or DNS records

ZTP or manual configuration

DNS records or DHCP options

NEW QUESTION 219

Refer to the exhibit. An architect is developing a solution to consolidate networks while retaining device redundancy. The routing protocol for the WAN routers must be open standard, ensure high availability, and provide the fastest convergence time. Which solution must the design include?