Cisco CCNA
Study Notes
CCNA VLANs
Quiz and Flashcards: https://networkdirection.net/labsandquizzes/quizzes/cisco-ccna-quizzes/ccna-vlans Labs: https://networkdirection.net/labsandquizzes/labs/cisco-ccna-labs/ccna-vlans Notes Switching Switches traditionally operate at layer-2, although many are capable of layer-3 (routing) functions as well. At layer-2, they primarily work with Ethernet frames and MAC addresses. When frames are sent through the network, they are rewritten by layer-3 devices. That is, the router updates the source MAC as...
CCNA Interfaces
Quiz and Flashcards: https://networkdirection.net/labsandquizzes/quizzes/cisco-ccna-quizzes/ccna-interfaces Labs: https://networkdirection.net/labsandquizzes/labs/cisco-ccna-labs/ccna-interfaces Notes Connecting Interfaces There are different types of interface, the most common of which are RJ45 and transceivers. RJ45 is the regular copper cable connector that you probably see the most. Transceivers are added to the switch to set a particular port type. Transceivers are commonly called SFP's (although technically,...
CCNA Spanning Tree
Quiz and Flashcards: https://networkdirection.net/labsandquizzes/quizzes/cisco-ccna-quizzes/ccna-spanning-tree-review Labs: https://networkdirection.net/labsandquizzes/labs/cisco-ccna-labs/ccna-spanning-tree Notes The Need for Spanning-Tree There is no loop prevention built into layer-2. This means that certain traffic will loop around the network indefinitely until all resources are consumed or devices are rebooted. Spanning-Tree prevents this from happening by finding redundant links (links that create loops), and blocking traffic on...
CCNA Rapid Spanning Tree
Quiz and Flashcards: https://networkdirection.net/labsandquizzes/quizzes/cisco-ccna-quizzes/ccna-rapid-spanning-tree Labs: https://networkdirection.net/labsandquizzes/labs/cisco-ccna-labs/ccna-rapid-spanning-tree Notes Introducing RSTP Spanning-tree has been around since the mid-80's, and over time needed improvement. There have been several off-shoots of spanning-tree, but the most popular is Rapid Spanning-Tree. As the name suggests, RSTP is faster to react to changes in the network, such as failures, adding new links and...
CCNA Etherchannels
Quiz and Flashcards: https://networkdirection.net/labsandquizzes/quizzes/cisco-ccna-quizzes/ccna-etherchannels Labs: https://networkdirection.net/labsandquizzes/labs/cisco-ccna-labs/ccna-etherchannels Notes What are EtherChannels We might connect two switches with multiple links for redundancy and better performance. If we leave it at that, spanning-tree will keep one link alive, and block the rest. This achieves the redundancy goal, but fails the performance goal. The alternative is to bundle several links...
CCNA Power over Ethernet
Quiz and Flashcards: https://networkdirection.net/labsandquizzes/quizzes/cisco-ccna-quizzes/ccna-power-over-ethernet Labs: No lab with this video Video: https://youtu.be/-RAPwEMHM58 Notes PoE Standards PoE is used to power devices like phones, cameras, and wireless access points, from a switch port. This eliminates the need for separate power sockets in the wall for each of these devices. Any device that supplies PoE power is called...
CCNA Routing Review
https://youtu.be/PXs8KDFVj1c Study Notes Quizzes and flashcards Transcripts Labs Notes IP Addresses Most devices on the network have IP addresses. IP addresses look like a single address, but actually include the network (subnet) and the host. The network portion is used when a packet needs to be sent to another network. The host portion is used...
CCNA Dynamic Routing
Notes What are Routing Protocols? In most cases, dynamic routing protocols are simpler than static routes. However, they still have the same goal - To build the routing table with accurate routing information. Routing Protocols (RPs) discover connected routers that are also running the same protocol. These are called neighbours or peers. Once they establish...
CCNA OSPF Neighbours
https://youtu.be/PNSMLevN3-4 Labs Transcripts Quizzes Study Notes Notes Chapter #1 - Finding Neighbours Cisco routers can (optionally) run OSPF. This is done by starting the OSPF process. There can be multiple OSPF processes on a router, each identified with an ID number. Once the process is running, OSPF routers need to find neighbouring (or adjacent) routers...
CCNA OSPF Database and Networks
https://youtu.be/_jrGX7Tclgo Labs Transcripts Flash Cards Quizzes Study Notes Notes Chapter #1 - The OSPF Database OSPF maintains a database of topology information, called the Link State Database (LSDB). This includes routers (identified by Router-ID), and the links between them. We can look at the contents of the LSDB with show ip ospf database. The router link states...
CCNA OSPF Routes
https://youtu.be/WQ_7iGYu3kc Study Notes Quizzes and flashcards Transcripts Labs Flash Cards Notes Chapter #1 - OSPF Cost OSPF stores the topology in the LSDB. An important piece of information is the metric, or cost. The SPF algorithm uses this to decide which paths through the network are best. OSPF calculates the cost of a link by...
CCNA Introduction to QoS
https://youtu.be/GltpnpM3-C4 Quiz and Flashcards Labs Transcript Study Notes Notes Chapter #2 - What is QoS? Networks experience congestion, like traffic congestion on the road, this is when the link has more traffic than it can handle. Once this happens, some packets are dropped. QoS helps by prioritising important traffic over less important traffic. If traffic...
CCNA QoS Traffic Management
https://youtu.be/BHnd02z6QqM Study Notes Quizzes and flashcards Transcripts Labs Notes Chapter #1 - Class Models We don't need to guess which classes to use. There are several good models out there that we can use as a template, and adjust according to our needs. Cisco have a 4/5-class, 8-class, and 12-class model (they vary in details,...
CCNA IPv6 Overview
https://youtu.be/PWiERFT27NU Study Notes Transcripts Notes Chapter #1 - A History Lesson In 1973, the Internet Protocol (IP) was part of TCPv1. In 1977, TCP and IP became separate protocols. Later in 1982, the US DoD made TCP/IP the standard for networking in the US military. We've been using IPv4 for forty years, but it suffers...
CCNA IPv6 Addresses
https://youtu.be/I6UfJmb5f3k Study Notes Quizzes and flashcards Transcripts Notes Chapter #1 - Address Format IPv6 addresses are quite different to IPv4. They use hexadecimal numbers, rather than decimal. There are also eight groups of numbers, rather than four. Each group is separated by colon characters. Chapter #2 - Making it Simpler IPv6 addresses can be simplified....
CCNA IPv6 Address Types
https://youtu.be/rOODLcicVCw Study Notes Quizzes and flashcards Transcripts Labs Notes Chapter #1 - Public Address Space IPv6 follows the pattern originally intended for IPv4. It intends most addresses to be publically routable. These addresses are called Global unicast addresses. This means we generally have no need for NAT. There are still some NAT technologies, such as...
CCNA Configuring IPv6
https://youtu.be/WQ_7iGYu3kc Study Notes Quizzes and flashcards Transcripts Labs Notes Chapter #1 - Static Addresses We can configure IPv6 addresses statically, or dynamically (EUI-64, stateful DHCP, stateless DHCP, and SLAAC). Keep in mind that we can have IPv6 and IPv4 at the same time (dual-stack). Most IPv6 commands are nearly the same as when we configure...
CCNA Routing with IPv6
https://youtu.be/WQ_7iGYu3kc Study Notes Quizzes and flashcards Transcripts Labs Notes Chapter #1 - Static Routing IPv6 routing is very similar to IPv4. On a Cisco router, start by enabling 'ipv6 unicast' Then, you can just use the 'ipv6 route' command to add static routes. ::/0 is the default route. Use 'show ipv6 route' to show the...
About this Series
This series is designed to take the fundamental networking knowledge that you already have, and build on it to get you CCNA ready.
If you haven't learned the fundamentals of networking yet, I recommend that you try the Network Fundamental Series first.
Most videos include optional extras to help you to test your understanding. These include quizzes, labs, study notes, transcripts, and flashcards.
The video series is free to all. The extra content is an inexpensive bonus for Patreon subscribers.
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