13. Hot Standby Router Protocol
(HSRP) is used for selecting a
standby router when one router
fails. That is, HSRP allows IP
workstations to continue
uninterrupted communication over
the internetwork even if their
default router becomes
unavailable.
14. The number of router hops
from one edge to another edge in
a network is called diameter.
Limiting the diameter of an
internetwork provides
predictable and consistent
performance and ease of
troubleshooting. The network
diameter is more appropriate at
Core layer.
15. Cisco Discovery Protocol
(CDP) is a proprietary protocol
supported by Cisco devices and
gives information about the
devices. Used for automatic
discovery of Cisco networking
components in a network.
