Question 3 of 250 from exam 400-201: Cisco CCIE Service Provider Written Exam
Question
Which are the two advantages of Cisco IOS XR Software over Cisco IOS Software? (Choose two.)
Answers
Explanations
DE.
The two advantages of Cisco IOS XR Software over Cisco IOS Software are:
A monolithic OS: Cisco IOS XR Software is a monolithic operating system that uses a microkernel architecture. This means that the OS runs as a single process, providing enhanced stability and reliability. In contrast, Cisco IOS Software is modular and composed of multiple processes that interact with each other. This can result in a higher risk of instability, especially when making changes or upgrades to the system.
Two-stage configuration: Cisco IOS XR Software uses a two-stage configuration process that separates the configuration of the system from the activation of the configuration. This provides a high degree of control over the configuration process and minimizes the risk of configuration errors. In contrast, Cisco IOS Software uses a one-stage configuration process, which can be more error-prone, as configuration changes are activated immediately upon entry.
The other options are not advantages of Cisco IOS XR Software over Cisco IOS Software:
B. A configuration that is grouped by interface: Both Cisco IOS XR Software and Cisco IOS Software use a configuration that is grouped by interface.
C. One-stage configuration: As discussed above, Cisco IOS XR Software uses a two-stage configuration process, whereas Cisco IOS Software uses a one-stage configuration process.
E. A configuration that is grouped by process: This is not an advantage of Cisco IOS XR Software over Cisco IOS Software, as both use a configuration that is grouped by interface.
