GCED Question #68: Real Exam Question with Answer & Explanation

The correct answer is B. Having to replace the kernel. Many administrators are hesitant to upgrade the IOS on routers based on past experience with the code introducing instability into the network. It is often difficult to completely test an IOS software upgrade in a production environment because the monolithic kernel requires that

Question

Network administrators are often hesitant to patch the operating systems on CISCO router and switch operating systems, due to the possibility of causing network instability, mainly because of which of the following?

Options

AHaving to rebuild all ACLs
BHaving to replace the kernel
CHaving to re-IP the device
DHaving to rebuild ARP tables
EHaving to rebuild the routing tables

Explanation

Many administrators are hesitant to upgrade the IOS on routers based on past experience with the code introducing instability into the network. It is often difficult to completely test an IOS software upgrade in a production environment because the monolithic kernel requires that the IOS be replaced before the device can be tested. Because of these reasons, IOS upgrades to resolve security flaws are often left undone in many organizations.

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