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Exam 300-420 topic 1 question 101 discussion

Actual exam question from Cisco's 300-420

Question #: 101
Topic #: 1

An architect is working on a design to connect a company's main site to several small to medium-sized remote branches. The solution must include redundant
WAN links, but the customer has a limited budget and wants the ability to increase the link speed easily in the future. QoS will run on the branch routers, so there is no need for consistent end-to-end QoS. Which solution does the architect propose?

A. dual-homed WAN MPLS with single-edge router
B. dual-homed Internet with a single-edge router running a site-to-site VPN topology
C. dual-homed WAN MPLS and Internet links via dual-edge routers
D. dual-homed Internet with dual-edge routers running a hub-and-spoke VPN topology

Show Suggested Answer

Suggested Answer: B 🗳️

by enterTheDevOps at Jan. 21, 2022, 5:45 p.m.

Comments

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chaba7654321

3 months, 1 week ago

Selected Answer: D

going with D, as hub and spoke is more suitable

upvoted 1 times

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neiker45

11 months ago

Hub and spoke. The main site will be the hub and the branches the spokes. You could even use something like DMVPN to set up the links dynamically and while you're at it you are setting up the company for future expansion (more branches).

upvoted 1 times

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salmarin

11 months, 2 weeks ago

Selected Answer: D

I would go with Hub and spoke rather than site to site, and what's the point of two WAN links with a single router ? despite the limited budget dual homed router make sense.

upvoted 1 times

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ALOVEVIKS

1 year, 6 months ago

Selected Answer: B

The solution must include redundant WAN links - dual-homed Internet but the customer has a limited budget - a single-edge router and wants the ability to increase the link speed easily in the future. QoS will run on the branch routers, so there is no need for consistent end-to-end QoS. - site-to-site VPN topology B. dual-homed Internet with a single-edge router running a site-to-site VPN topology

upvoted 4 times

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cerifyme85

1 year, 8 months ago

Selected Answer: B

multiple branches does not mean u need multiple physical links or routers.. the WAN transport is internet with VPN tunnels.. answer is B

upvoted 2 times

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jzzmth

1 year, 9 months ago

Selected Answer: B

I am definitely going with B here. DIA is cheaper than MPLS Single edge router is cheaper than dual edge routers

upvoted 4 times

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Noproblem22

1 year, 11 months ago

I will go for D

upvoted 1 times

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iLikeHamburgers

2 years ago

Selected Answer: B

First of all, these answers suck. An internet connection is usually cheaper than an MPLS 2 routers cost more to operate/own than 1 That being said C & D are out because both solution state "dual-edge" routers. The cheapest solution between A & B is B because B is an internet link, and A is an MPLS link. Further more it mention that "there is no need for consistent end-to-end QoS.", well with MPLS we can ask/require for SLA's in our contract, with an internet connection we cannot. That leaves me with answer B.

upvoted 4 times

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andrewChan

2 years, 1 month ago

Selected Answer: B

I would prefer B as following reason, 1. limited budget 2. does not mention about spoke to spoke connectivity in the requirement. so D is not best in the suitation. the VPN may configure as GRE IPSec or under VTI

upvoted 1 times

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