1.1.a Describe basic software architecture differences between IOS and IOS XE

from ccna security flg, by catherine paquet… this is also a ciscopress 9.99 book of the week… arteq, you say, “you are always going backwards…”  this never ends, you are therefore always beginning…

http://www.ciscopress.com/index.asp

Data plane packets: End-station, user-generated packets that are always forwarded
by network devices to other end-station devices. From the perspective of the net-
work device, data plane packets always have a transit destination IP address and can
be managed by normal, destination IP address–based forwarding processes. Data
plane packets are typically processed in a fast-switching cache.

Control plane packets: Network device–generated/received packets that are used
for the creation and operation of the network itself. From the perspective of the net-
work device, control plane packets always have a receive destination IP address and
are managed by the CPU in the network device route processor. Examples include
protocols such as Address Resolution Protocol (ARP), Border Gateway Protocol
(BGP), Open Shortest Path First (OSPF), and other protocols that hold the network
together.
Management plane packets: Network device–generated/received packets, or man-
agement station–generated/received packets, that are used to manage the network.
From the perspective of the network device, management plane packets always have
a receive destination IP address and are managed by the CPU in the network device
route processor. Examples include protocols such as Telnet, Secure Shell (SSH),
TFTP, SNMP, FTP, Network Time Protocol (NTP), and other protocols that are used
to manage the device or network