1.1 LAN switching technologies
1.1.a Implement and troubleshoot switch administration
- 1.1.a (i) Managing MAC address table
- 1.1.a (ii) errdisable recovery
- 1.1.a (iii) L2 MTU
1.1.b Implement and troubleshoot layer 2 protocols
- 1.1.b (i) CDP, LLDP
- 1.1.b (ii) UDLD
1.1.c Implement and troubleshoot VLAN
- 1.1.c (i) access ports
- 1.1.c (ii) VLAN database
- 1.1.c (iii) normal, extended VLAN, voice VLAN
1.1.d Implement and troubleshoot trunking
- 1.1.d (i) VTPv1, VTPv2, VTPv3, VTP pruning
- 1.1.d (ii) dot1Q
- 1.1.d (iii) Native VLAN
- 1.1.d (iv) Manual pruning
1.1.e Implement and troubleshoot etherchannel
- 1.1.e (i) LACP, PAgP, manual
- 1.1.e (ii) layer 2, layer 3
- 1.1.e (iii) load-balancing
- 1.1.e (iv) etherchannel misconfiguration guard
1.1.f Implement and troubleshoot spanning-tree
- 1.1.f (i) PVST+/RPVST+/MST
- 1.1.f (ii) switch priority, port priority, path cost, STP timers
- 1.1.f (iii) port fast, BPDUguard, BPDUfilter
- 1.1.f (iv) loopguard, rootguard
1.1.g Implement and troubleshoot other LAN switching technologies
- 1.1.g (i) SPAN, RSPAN, ERSPAN

1.2 Layer 2 Multicast
1.2.a Implement and troubleshoot IGMP
- 1.2.a (I) IGMPv1, IGMPv2, IGMPv3
- 1.2.a (ii) IGMP snooping
- 1.2.a (iii) IGMP querier
- 1.2.a (iv) IGMP filter
- 1.2.a (v) IGMP proxy
1.3 Layer 2 WAN circuit technologies
1.3.a Implement and troubleshoot HDLC
1.3.b Implement and troubleshoot PPP
- 1.3.b (i) authentication (PAP, CHAP)
- 1.3.b (ii) PPPoE
- 1.3.b (iii) MLPPP
1.4 Troubleshooting layer 2 technologies
1.4.a Use IOS troubleshooting tools
- 1.4.a (i) debug, conditional debug
- 1.4.a (ii) ping, traceroute with extended options
- 1.4.a (iii) Embedded packet capture
1.4.b Apply troubleshooting methodologies
- 1.4.b (i) Diagnose the root cause of networking issue (analyze symptoms, identify and describe root cause)
- 1.4.b (ii) Design and implement valid solutions according to constraints
- 1.4.b (iii) Verify and monitor resolution
1.4.c Interpret packet capture
- 1.4.c (i) Using wireshark trace analyzer
- 1.4.c (ii) Using IOS embedded packet capture