Here is the latest installment of resources. This covers the first chunk of the massive Layer 2 section.
2.1 LAN switching technologies
2.1.a Implement and troubleshoot switch administration
2.1.a [i] Managing MAC address table
2.1.a [ii] errdisable recovery
2.1.a [iii] L2 MTU
2.1.b Implement and troubleshoot layer 2 protocols
2.1.b [i] CDP, LLDP
2.1.b [ii] UDLD
2.1.c Implement and troubleshoot VLAN
2.1.c [i] Access ports
2.1.c [ii] VLAN database
2.1.c [iii] Normal, extended VLAN, voice VLAN
2.1.d Implement and troubleshoot trunking
2.1.d [i] VTPv1, VTPv2, VTPv3, VTP pruning
2.1.d [ii] dot1Q
2.1.d [iii] Native VLAN
2.1.d [iv] Manual pruning
BOOKS
Cisco LAN Switching Fundamentals
