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?

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?
A . Having to rebuild all ACLs
B . Having to replace the kernel
C . Having to re-IP the device
D . Having to rebuild ARP tables
E . Having to rebuild the routing tables

View Answer

Answer: B

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.