A service provider is deploying a new edge router that must support frequent software updates and the ability to restart a single routing protocol process without disrupting other services. The router is a fixed-form-factor device. Which operating system architecture best meets this requirement?

Any of the above, because all Cisco network operating systems support process restart.

IOS XR, because it uses a microkernel and is designed for distributed systems.

IOS XE, because it runs processes as separate Linux processes that can be restarted independently.

Classic IOS, because it is lightweight and has a small memory footprint.

How does IOS XR achieve high availability in its architecture?

By running all processes in a single memory space to avoid inter-process communication overhead.

By using a monolithic kernel that can restart the entire system quickly.

By using a single control plane processor that is duplicated for redundancy.

By isolating processes in separate memory spaces so that a failure in one process does not affect others, and by supporting process restart and failover.

Which statement accurately describes the IOS XR architecture?

It runs on a Linux kernel and uses a single user-space process for all control-plane functions.

It uses a microkernel-based design with processes running in separate memory spaces, providing high availability and modularity.

It is a monolithic operating system with a single process for all routing protocols.

It is designed only for small branch routers with limited scalability.

A small ISP has a legacy router running classic Cisco IOS that is experiencing intermittent crashes. The engineer suspects a memory leak in a routing protocol process. What is a key limitation of classic IOS that makes this issue difficult to resolve without a reboot?

All processes share a single memory space

Processes run in isolated virtual machines

The control plane is separated from the data plane

A service provider is planning to decommission a legacy router running classic Cisco IOS. The router is still in production but is no longer receiving software updates. What is a primary architectural reason to migrate to a newer operating system?

Classic IOS does not support BGP or OSPF

Classic IOS uses a microkernel that is insecure

Classic IOS has a monolithic architecture that limits fault isolation

Classic IOS cannot run on any modern hardware

CiscoCertified Network Professional Service Provider

Domain 1Objective 2

1.2 Describe Cisco Network Software Architecture 350-501 Practice Questions (Page 2)

Part of the Architecture domain, which accounts for 15% of the 350-501 exam. Cisco does not publish an official question count, but from its 120-minute exam (~50–80 total, ~8–12 in this domain), expect 1–2 from this objective — we provide 33 practice questions to prepare you well beyond it. (estimate)

33questions here

7free pages

4concepts

15%of the exam

Questions 6–10

6application · medium
A service provider is deploying a new edge router that must support frequent software updates and the ability to restart a single routing protocol process without disrupting other services. The router is a fixed-form-factor device. Which operating system architecture best meets this requirement?
Select an answer first
7foundation · easy
How does IOS XR achieve high availability in its architecture?
Select an answer first
8foundation · easy
Which statement accurately describes the IOS XR architecture?
Select an answer first
9application · medium
A small ISP has a legacy router running classic Cisco IOS that is experiencing intermittent crashes. The engineer suspects a memory leak in a routing protocol process. What is a key limitation of classic IOS that makes this issue difficult to resolve without a reboot?
Select an answer first
10application · medium
A service provider is planning to decommission a legacy router running classic Cisco IOS. The router is still in production but is no longer receiving software updates. What is a primary architectural reason to migrate to a newer operating system?
Select an answer first

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