Protocol Testing

Layer2 and Layer 3 protocols are very important in networking.Layer 3 deals with routing with header of packets. Routing define the best path to reach to destination.Here higher level data will converted with packets.
Protocols operated with layer 3 (RIP, OSPF, BGP,IS-IS,IGRP, EIGRP, IPSec, NAT, VRRP,IPv4,IPv6,.....

Layer 2 deals with switching technology with header of frames. Here the upper layer data will be converted to frames.

Layer 2 protocols are ( VLANS,RSTP,MSTP,STP,VPLS.......)

Use of verification command

Router# configure terminal
Router(config)# protocol-filter
Router(config)# end
Router(config)# show running-configuration
Router(config)#show protocol-filtering

Above configuration is sample to learn protocol testing .....

Up dates will be continue on protocol testing.........Thanks