> For the complete documentation index, see [llms.txt](https://cisco.microcisco.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cisco.microcisco.com/icnd-1.md).

# CCNA

- [Networking Fundamentals](https://cisco.microcisco.com/icnd-1/tips-and-tricks.md)
- [Introduction](https://cisco.microcisco.com/icnd-1/introduction.md)
- [OSI, TCP/IP and 5 Layer Model](https://cisco.microcisco.com/icnd-1/osi-model.md): How devices communicate by being critical building blocks for the understanding of networking. Of the 7 layers of the OSI Model, we will concentrate on Layers 1-4 where Network Engineers reside.
- [Binary](https://cisco.microcisco.com/icnd-1/untitled.md): Binary is a basic building block in networking. We use binary for IP addressing, sub-netting, access lists, inverse masks etc.
- [Hexadecimal](https://cisco.microcisco.com/icnd-1/hexadecimal.md): Convert Hex to Binary, Decimal and back again
- [Cabling and Packet Flows](https://cisco.microcisco.com/icnd-1/cabling-and-packet-flows.md): How does data flow in hubs, switches and routers
- [IP v4 Addressing](https://cisco.microcisco.com/icnd-1/ip-v4-addressing.md)
- [VLSM](https://cisco.microcisco.com/icnd-1/ip-v4-addressing/vlsm.md): Variable Length Subnet Mask
- [Cisco IOS Software](https://cisco.microcisco.com/icnd-1/cisco-ios-software.md): Connection to a router, boot-up an various options including basic IOS commands, modes (user mode / privilege mode) etc
- [Wireshark Basics](https://cisco.microcisco.com/icnd-1/wireshark-basics.md)
- [Switches](https://cisco.microcisco.com/icnd-1/switches.md)
- [VLANS](https://cisco.microcisco.com/icnd-1/switches/vlans.md): Virtual LAN's
- [DTP/VTP (Cisco Proprietary)](https://cisco.microcisco.com/icnd-1/switches/vlans/dtp-vtp-cisco-proprietary.md): Dynamic Trunking Protocol / VLAN Trunking Protocol
- [STP - Classic](https://cisco.microcisco.com/icnd-1/switches/vlans/stp.md): Spanning Tree Protocol - Stop network loops !!
- [STP - RSTP](https://cisco.microcisco.com/icnd-1/switches/vlans/stp-rstp.md): Rapid Spanning Tree Protocol - Cisco's Version = Rapid (Per VLAN) Spanning Tree +
- [EtherChannel](https://cisco.microcisco.com/icnd-1/switches/etherchannel.md): Layer2 and Layer3 Ether Channels, L2 grouping of switched ports and L3 is a grouping of routed ports acting as a single port with a single IP address
- [Routing](https://cisco.microcisco.com/icnd-1/routing.md): DAY 11 - NEED TO FINISH :(
- [Dynamic Routing](https://cisco.microcisco.com/icnd-1/routing/dynamic-routing.md): Static routing - manually configure routes to each destination using "IP ROUTE" command. Dynamic routing - use dynamic routing protocol to find best routes to destination networks
- [RIP and EIGRP](https://cisco.microcisco.com/icnd-1/routing/rip-and-eigrp.md)
- [OSPF 1 - Basics](https://cisco.microcisco.com/icnd-1/routing/ospf.md): Open Shortest Path First
- [OSPF 2 - Cost, Neighbours and Configs](https://cisco.microcisco.com/icnd-1/routing/ospf-2-cost-neighbours-and-configs.md)
- [OSPF 3 - Network and LSA Types](https://cisco.microcisco.com/icnd-1/routing/ospf-3-network-and-lsa-types.md): This section looks at neighbour / adjacencies (there is a difference!!) , Point-to-Point , Broadcast (DR/BDR) selections, OSPF Network and LSA Types
- [FHRP](https://cisco.microcisco.com/icnd-1/routing/fhrp.md): First Hop Redundancy Protocol is designed to protect the default gateway used on a subnet by allowing 2 or more router to provide backup to that address
- [HSRP](https://cisco.microcisco.com/icnd-1/routing/fhrp/fhrp.md): First Hop Redundancy Protocol - HSRP
- [VRRP](https://cisco.microcisco.com/icnd-1/routing/fhrp/vrrp.md): Virtual Router Redundancy Protocol
- [IP SLA](https://cisco.microcisco.com/icnd-1/routing/ip-sla.md): Used to be (RTA - Real Time Responder), then it was called the (SAA - Service Assurance Agent) and now its called IP SLA.
- [BGP](https://cisco.microcisco.com/icnd-1/routing/bgp.md)
- [Regular Expressions](https://cisco.microcisco.com/icnd-1/routing/bgp/regular-expressions.md): Asterisk on STEROIDS !!
- [Programming](https://cisco.microcisco.com/icnd-1/programming.md)


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