Cisco CCNA 200-301 complete video course

Explore the Cisco CCNA 200-301 complete course overview, covering Packet Tracer usage, configuring devices, subnetting, VLANs, ACLs, NAT, routing protocols, wireless LAN, VPNs, and Python network automation.

Explore Cisco switch models from Catalyst lines, learn layer 2 and layer 3 capabilities, MAC and IP addressing, stacking with StackWise, and the function of supervisor engines in chassis switches.

Explore common router models and how they isolate networks and route between internal networks and the internet service provider, with examples from Cisco 600–900 series for home labs.

Explore Cisco device memory, including flash and dynamic memory, and no page file; check memory before upgrades and access updates via the Cisco support portal.

Explore fixed versus modular Cisco switches, including SFP ports and blades or modules, voice and DSP cards, voice over IP, and redundancy with a supervisor brain and power supplies.

Build a home lab using real hardware or free applications to learn networking, with at least one Cisco device acting as router, switch, and wifi test platform.

Download and install Cisco packet tracer from the Cisco Networking Academy, log in or register, and launch the desktop app. Build and connect networks with switches, PCs, and routers.

Visualize network traffic with a simulation tool, switching between logical and physical views, configuring IP addresses, and testing connectivity with ICMP ping while exploring PDUs, frames, MAC addresses, and ARP.

Visualizes network traffic with complex pdus by simulating a web server, clients, and http traffic; shows IP addressing, port 80, packets, and layered views of requests and responses.

Explore physical view by building a rack: add and rename devices, configure slots, power off to install modules, and connect switches, routers, firewall, access points, and PC with crossover cables.

Hub broadcasts every signal to all ports, increasing latency and security risks; switches learn devices via a CAM table and then use unicast, reducing overhead and improving performance.

Explore primary wireless access point functions, including 2.4 and 5 GHz operation, channel planning, dead zones, interference, and the use of controllers to manage many APs in enterprise networks.

Learn how primary routers connect networks, manage two interfaces, forward traffic with routing tables and IP addresses, and block external access to protect the home network.

Explore how network firewalls protect internal networks, explain hardware and software firewall options, and learn port forwarding, static IP requirements, web filtering, and how to manage bandwidth for small offices.

Explore how bytes and bits define capacity and speed, from kilobytes to gigabytes, and how 100 Mbps and 1 Gbps transfer times relate to collision detection and avoidance.

Explore unicast, broadcast, and multicast as data delivery methods and see how DHCP and ARP support addressing and discovery in practical imaging and IPTV scenarios.

Understand how subnet mask defines network and host portions of IP addresses, explore classful addressing, and apply these rules to assign scalable networks and hosts.

Explore how devices obtain IP addresses, subnet masks, and a default gateway, and how DNS servers translate domain names to IP addresses to access websites.

Discover how network address translation lets private IPs reach the internet using a public IP. Understand private vs public IPs, MAC addressing, and static versus dynamic addresses.

Explore TCP, UDP, and ICMP protocols—TCP for trusted connections and handshake, UDP for real-time apps, and ICMP for troubleshooting—using ping and traceroute to test connectivity and latency.

Master engineer tools for network troubleshooting and remote access, including ipconfig, arp, mac address discovery, dns lookup, and telnet-based device management.

Demonstrate fault-tolerant network design using access, distribution, and core switches with dual paths to keep users online.

Explore the OSI and TCP/IP models, their seven and four-layer structures, and how encapsulation, ports, IP addresses, MAC addresses, and frame check sequences drive network communication.

Learn Cisco ios fundamentals, the operating system, emphasizing the command line interface for flexible configuration and troubleshooting. Explore modular licensing for ip telephony and videoconferencing.

Learn the five Cisco IOS modes on a router—user, privileged, global configuration, interface, and line modes—and master essential commands like enable, configure terminal, and no for undo.

Learn Cisco commands for privilege and global configuration modes. Rename router with hostname, set password with login, disable ip domain lookup, and use arrow keys for history.

Explore how ios filesystem uses flash memory, ram, and startup versus running configurations, and save changes with commands like copy running-config startup-config and write memory.

Configure a basic Cisco router: set hostname and banner, secure console and enable passwords, enable telnet, assign IP addresses to interfaces, activate them, and enable password encryption.

Learn how to configure a Cisco switch: connect via Telnet, assign a management IP to VLAN 1 (not to individual ports), enable interfaces, and understand default VLAN behavior.

This lecture explains why telnet is insecure and shows how to configure ssh on a Cisco device by creating a domain name, usernames, and rsa keys, and restricting ssh access.

Explore collision domains and duplex in network design, comparing hubs and switches, and explain how full duplex avoids collisions while half duplex requires devices to take turns.

Demonstrates securing a wired network with port security on switches, disabling unused ports, enabling Mac address sticky, and preventing unauthorized devices from plugging into access points or patch boxes.

Virtual local area networks on switches isolate ports to improve security, reduce broadcast domains, and manage traffic, with trunk and access ports enabling inter-switch connectivity.

Learn how to route between VLANs using three methods: direct router connections, router-on-a-stick with trunk subinterfaces, and layer 3 switches.

Master vlan trunking concepts, including trunk ports, tagging, and native vlan, and learn to disable dtp and manually configure trunks between switches.

Learn how VTP automatically synchronizes switch information via revision numbers and the risks of reintroducing or resetting switches. Cisco recommends disabling VTP or using transparent mode for manual VLAN configuration.

Create and name vlans, assign port ranges to each vlan as access ports. Then verify connectivity between pcs within vlans and note no inter-vlan routing exists without routers.

Configure trunking between two switches and assign ports to enable inter-switch communication. Verify connectivity with PC pings, and establish domains on both switches to support trunking.

Learn to configure routing across three networks using two routers in Cisco Packet Tracer, assign gigabit interfaces with correct /24 subnets, set default gateways, and verify connectivity with ping.

Configure static routing to reach distant networks by adding destination prefixes and next-hop addresses in the routing table, then verify with icmp pings between interfaces.

Explore administrative distance and load balancing with two links, using static routes and floating static routes to create a primary and backup path for reliable routing.

Configure router on a stick by creating VLAN 51 and 52 subinterfaces with dot1q trunking and IP addresses, enabling inter-VLAN communication between the PCs.

Enable ip routing on the layer 3 switch, configure interfaces with IP addresses, and verify routing between VLANs by pinging hosts.

Learn how the DHCP server automates IP addressing for devices, providing IPs, subnet masks, default gateways, and DNS with pools, exclusions, and lease times across networks and VLANs.

Configure a dhcp server with two scopes for two networks, exclude specific addresses, assign a default gateway and server ip, and verify device bindings show which clients received addresses.

Configure a DHCP relay to forward client requests from vlan 52 to the DHCP server on vlan 51 using an IP helper address on the router interface.

Explore dynamic routing, routing tables, and how protocols share network information, including RIP, IGRP, IS-IS/OSPF, and BGP, with hello messages and load balancing.

Learn how rip dynamically shares network information between routers using version 2, with no auto summary, updates every 30 seconds, and administrative distance of 112.

Learn how subnetting splits a pool of IP addresses into multiple networks by adjusting the subnet mask, enabling more networks or more hosts for ISP customers.

Learn how IPv4 addresses map four octets into 32 bits and master decimal-to-binary and binary-to-decimal conversions using a simple calculator, essential for subnetting.

Master subnetting networks by converting to binary, borrowing host bits to create subnets, calculating increments (32) with a 24-bit mask such as 255.255.255.0, and defining network ranges.

Learn subnetting networks by converting required networks to binary, determining bits and increments, and building subnet masks to define network and host ranges across class C and class B addresses.

Apply subnetting by converting host requirements to binary, selecting the appropriate subnet mask and increments, and defining IP ranges for 30 and 50 hosts using a class C mask.

Master reverse engineering of subnetting by analyzing IP addresses and subnet masks to derive network ranges, troubleshoot connectivity, and assign correct IP addresses for proper network placement.

Master variable length subnet mask (VLSM) by designing six networks with different host needs (60, 40, 20, etc.), calculating masks and increments, and mapping IP ranges.

Learn to configure Cisco ACLs, including standard and extended types, to block or permit traffic between networks, and apply standard ACL inbound on interfaces with default deny.

Demonstrates creating and applying standard ip access lists on Cisco routers to block traffic between networks, using wildcard masks, applying to outbound interface, and validating with ping tests.

Configure NAT on a Cisco router by defining an internal network, designating inside and outside interfaces, and enabling NAT overload to let private hosts access the internet.

Configure static NAT to expose an internal web server to the internet by mapping its inside local IP to the router’s outside global IP and forwarding port 80.

Explore IPv6 addressing, including unicast, multicast, and anycast, and how DHCPv6 uses multicast rather than broadcast for address allocation. Learn leading-zero removal and zero-group compression in IPv6 addresses.

Learn how IPv6 link-local addresses start with fe80 and map to a device’s network interface, while global addresses use a global prefix, subnet, host portions, and mac address considerations.

Configure ipv6 addressing on router gigabit interfaces 0/0 and 0/1, assign 2001:55::/64 and 2001:56::/64, and enable ipv6 unicast routing with static routes.

Learn how IPv6 uses hexadecimal notation and how to convert each nibble into four binary bits to transform hex addresses into binary form.

Learn to back up startup config and flash to a TFTP server, verify backups, and restore device configurations using TFTP or FTP with proper connectivity and permissions.

Learn how to reset a Cisco router password using rommon mode, bypass login, recover startup config, and restore passwords without losing device configurations, plus post-reset checks and security tips.

Compare single-mode and multimode fiber cables, noting thinner single-mode for long distances and thicker multimode for inside buildings, plus core, cladding, buffers, connectors, and SFP ports.

Learn how power over ethernet enables data and power over a single copper cable, via switches or injectors, for devices like IP phones and access points.

Discover how PoE works on a switch, including available power (370 watts total, 50 watts per port), per-port limits, and auto, never, and static modes with a live IP phone.

Master spanning tree protocol to prevent broadcast storms and loops by selecting the root bridge and enabling standby paths for reliable, redundant connectivity.

Learn to configure stp root bridge priorities on Cisco switches, set bridge priorities, and identify root and designated ports, path costs, and mac address relationships in a multi-switch lab.

Understand how the spanning tree protocol selects the best path to the root bridge by evaluating costs, bridge IDs, and designated versus blocked ports, including backup links.

Configure STP to designate a root bridge and backup bridge, adjust bridge priorities, manage designated and blocked ports, and observe listening, learning, and forwarding states, including rapid spanning tree protocol.

Learn to configure spanning tree with portfast and BPDU guard to protect switch ports, enabling portfast for single hosts and applying BPDU guard on port ranges.

Explore wifi security methods such as WEP, WPA, and WPA2, and learn to disable insecure features like WPS, while implementing centralized authentication with 802.1X, radius, or domain controllers.

Protect networks from rogue DHCP servers by enabling DHCP snooping on switches, enforcing trusted ports, and validating client traffic with discovery, offer, request, and acknowledge messages.

Configure and verify dhcp snooping on the switch, set trusted ports, enable option 82, deploy two dhcp servers, and validate client ip address assignments and the dhcp snooping binding table.

Learn how source guard protects networks from spoofing by binding and verifying each client’s IP and MAC addresses, and configure port security on Cisco switches.

Enable dynamic ARP inspection to validate ARP requests with DHCP snooping data, map IP to MAC in ARP tables, and block spoofed updates, using ACLs for manual IP/MAC entries.

Configure dynamic arp inspection to filter invalid arp requests by using the DHCP snooping binding table, trusting specific ports, and validating arp traffic on VLAN 30.

Implement dynamic arp inspection by creating a case-sensitive access-list to permit specific ip or mac hosts. Apply it to interfaces and enable destination and source mac and ip validation.

Aggregate multiple ethernet links into a single virtual interface via etherchannel and link aggregation, boosting throughput and preventing loops with spanning tree on Cisco devices.

Configure etherchannel across three switches with port-channel interfaces, using LSP protocol on the links, and verify spanning-tree roles and port states to ensure active, backup, and designated paths.

Explore how routing tables store network paths, explain next-hop and hop counts, and compare specific versus backup routes, along with administrative distance and RIP version two examples.

Configure static routes on routing tables using connected interfaces or next-hop IPs. Explain administrative distance, default gateway, gateway of last resort, and floating backup routes.

Contrast distance vector and link-state routing protocols, noting RIP and BGP as examples and ISIS as link-state, describe loop prevention via triggered updates, maximum metrics, route poisoning, and split horizon.

Learn how ospf, a link-state interior protocol, uses areas and summarisation to advertise networks. Enable version 2 for ipv4 and version 3 for ipv6 via area border routers.

Explore OSPF neighbor relationships, hello intervals, and how router-id and highest-ip-address on active interfaces define identity, with lookback interfaces and manual router-id overrides.

Explain the OSPF greeting process, detailing hello messages, timers, neighbor matching, master-slave election, database description exchange, link-state updates, and achieving full adjacency.

Explains how OSPF designates a designated router and a backup designated router in multi-access networks using hello messages, router IDs, and priority, and how to influence elections via zero priority.

This OSPF lab teaches activating OSPF on all routers, placing them in area zero, designating a router, configuring precise interface IPs, and verifying adjacencies and hello packets.

Explore hands-on ospf lab setup and troubleshooting, including configuring interfaces, wildcard masks, and neighbor relationships, to achieve designated router and backup designated router roles.

The lab demonstrates configuring OSPF designated router elections by lowering interface priority to zero and setting the reference bandwidth to 10000 for cost calculations across 100 mbps to 10 gbps.

Secure and optimize routing in the OSPF lab by defaulting all interfaces to passive, enabling only required links, aligning hello timers, and creating loopback interfaces for router IDs.

Troubleshoot an OSPF network by verifying physical interfaces and IP protocols, identify duplicate router IDs and area mismatches, and restore neighbor adjacencies across the network.

Demonstrates an OSPF multiarea lab configuring six routers as ABRs, assigning networks to area zero, area one, and area 51, and establishing neighbor relations with loopback interfaces.

Explore OSPF multiarea summarization by configuring area border routers to create brief network summaries across area one, area two, and area 51, reducing routing-table information while preserving reachability.

Explore configuring a simulated internet in an ospf multi-area lab, using a loopback interface, assigning IP addresses, setting a default route, and propagating last-resort information to all routers.

Explore EIGRP, the enhanced interior gateway routing protocol, and its dual diffusing update algorithm for fast backup routes, topology and routing tables, and key terms like successor and feasible successor.

Activate EIGRP across all routers, set the autonomous system, disable auto summarization, and configure networks precisely. Explore equal-cost load balancing and neighbor verification in a hands-on lab.

Observe how EIGRP auto summarization hides network details in the routing table; disable it on all routers to reveal detailed networks and apply a 22-bit IP summary-address EIGRP.

Explore configuring EIGRP lab 3: add a second link for equal-cost load balancing, adjust interface speeds, analyze routing and topology tables, and enable variance to support unequal loads.

Configure IPv6 addresses across head office and stores, enable IPv6 routing and OSPFv3, set up areas, and verify connectivity with ping and show commands.

Configure and verify an ipv6 eigrp lab on Cisco routers, enabling the protocol on interfaces and ensuring no shutdown for neighbor adjacency and route propagation.

Explore the WAN revolution: contrast leased line circuit-switched WANs with fixed speeds and high costs against packet-switched PVC/MPLS networks and VPNs offering lower cost and greater flexibility.

Compare adsl and fiber connections, explain asymmetric download and upload speeds, and distinguish dedicated internet access from shared internet, including router settings, mac address filtering, and bridge mode.

Port forwarding is insecure for remote access; VPN provides a secure tunnel for home and office, supporting client and site-to-site, SSL VPN, and key protections.

Configure a GRE tunnel between two routers to link private 10.x.x.x networks over public IPs, enable oil spill protocol in area zero, and establish a neighbor relationship.

Learn how BGP, an exterior gateway protocol used between autonomous systems on the internet, handles routing with slow, unreliable behavior and blacklist mechanisms.

In this bgp lab, configure two routers, assign interfaces with correct subnet masks, set up neighbor relationships, declare autonomous system numbers, advertise internal networks, and verify with show commands.

Explore HRP, a Cisco proprietary protocol that creates a single virtual IP and virtual MAC address, enabling active and standby routes through two routers with automatic failover.

Enable hsrp on routers to create a virtual ip address 10.1.55.1 with active and standby routes, configure priority and preemption, and verify failover with pings.

Learn how quality of service prioritizes traffic, classifies mission-critical, transactional, best effort, and scavenger traffic, and uses shaping, policy, and queuing to reduce delay, packet loss, and jitter.

Explore the AAA framework of authentication, authorization, and accounting, and see how Radius and TACACS servers centralize login, privileges, and auditing for Cisco devices and Wi‑Fi networks.

Explore extended access control lists, their differences from standard ACLs, and how to configure them. Apply inbound on interfaces to block traffic between networks using source, destination, and wildcard masks.

Learn how SNMP uses MIBs and object identifiers to monitor devices, using community strings for access, with read-only or read-write permissions and encryption across versions.

Configure SNMPv2c on a Cisco router using the RTG network monitor, create SNMP community string, add the device, and enable CPU and memory sensors with system health insights and alerts.

Configure SNMPv3 on a Cisco device by creating a read-only view, a monitor group, and a user with authentication and encryption, then apply and discover sensors.

Configure span (switchboard analyzer) to monitor traffic between devices, using remote span between switches, and forward inbound and outbound traffic from source ports to a server for analysis with Wireshark.

Explore autonomous versus lightweight wireless access points and how a Cisco wireless LAN controller centralizes management, adoption, and configuration across many APs, with centralized password changes and load-balanced link aggregation.

Configure a virtual wireless LAN controller from a VM image in VMware player, setting up service and management interfaces, IP addresses, bridging, and initial admin access.

Learn to configure a Cisco wireless LAN controller: log in, enable web mode, set management IP, create office, warehouse, and security interfaces, build WLANs, set passwords, and adopt access points.

Explore cdp and lldp overview to discover neighboring devices and gather network information for diagrams, including device names, IP/Mac addresses, PoE details, and link aggregation.

Learn to configure cdp and ldp on switches, view neighbors and hold times, and manage advertisements, control ldp transmitting and receiving on interfaces for targeted discovery.

Create a Cisco network diagram by mapping router and switch interfaces, ip addresses, and connections using show CDP neighbors and show ip interface brief, with CDP and LDP tools.

Discover how network automation simplifies configuring and troubleshooting many devices with python scripts and templates. Use zero-touch provisioning and automated configuration pushes to deploy and manage devices remotely.

Rest API stands for representational state transfer. Learn how the client–server model, stateless requests, and cacheable responses enable secure device-to-device communication in networking.

Navigate a rest api by following the uniform interface and kiss principles. Use real-world examples from eBay and bank connections, test endpoints like /people and /films with Postman.

Explore common api verbs such as get, post, patch, put, and delete, and see how they create, read, update, or remove resources using postman and json payloads.

Build a GNS3 lab using the Janus three emulator, link it to a virtual machine, and install real operating system images and appliances to simulate routers, switches, and hosts.

Learn to set up and manage an Ubuntu virtual machine, access Python 3, and practice basic concepts like variables and strings, integers and lists, including nested lists.

Create Python dictionaries with key-value pairs, including nested dictionaries and lists, then compile a trainer roster as a list of dictionaries and query attributes using keys.

Explore universal data serialization languages like XML, JSON, and YAML to enable cross-language communication between systems, allowing servers in Java and Python to exchange documents and APIs readably.

Explore the structure of JSON, including dictionaries/objects, lists/arrays, keys and values, braces, and how they appear in scripts and examples.

Explore controller-based networking that uses management, control, and data planes to automate network operations, with a distributed control plane handling protocols and automatic configuration.

Explore how software defined networking centralizes control in a main brain controller that manages devices via the SBI, using REST APIs and GUI tools like DNA Center.

Learn how software-defined networking uses an underlay physical network and an overlay virtual tunnel to connect switches via a controller, emphasizing layer 3 IP addressing.

Learn how Cisco ACI automates data center networks with the APIC controller, spine-leaf topology, endpoint groups, and policies over an overlay, accessible via a web interface.

Explore software defined access, detailing the control plane, data plane with Reglan virtual extensible LAN, and policy plane with scalable groups for fabric edge and fabric control nodes.

Learn how Cisco DNA Center discovers devices, builds a network topology map, and uses design, policy, and provisioning workflows to automate network management with assurance and APIs.

Connect to Cisco DNA Center's rest API using Postman, authenticate to obtain an access token. Use the token for getting devices and other API calls.

Explore devops tools like ansible, poppit, and siff to prevent configuration drift with infrastructure as code and GitHub, enabling backups, rollbacks, and automated deployments.

Ansible is an agentless, Python-based automation tool that uses YAML playbooks to push configurations from a central inventory to devices and servers, on Linux or Mac via VM (not Windows).

Explore puppet, a tool for managing devices with a puppet master and agents. Write manifests in puppet’s domain-specific language to define classes and resources that agents pull from the master.

Explore SIFF, the NATO automation concept, through a kitchen-themed model of nodes, agents, workstations, and a central server, where cookbooks and recipes configure devices via knife and agents pull updates.