Network+, CCNA & CCNP Video Collections Part 1

Learn the basics of layer 2 switching, including MAC address learning, CAM tables, forward and filter decisions, and loop avoidance with spanning tree.

Discover how spanning tree protocol prevents switching loops by electing a route bridge using priority and MAC address, and how designated, non designated, and blocking ports shape the network path.

Explore switchport security fundamentals, configure port security with sticky mac addresses, limit addresses per port, and respond to violations by shutting down, while viewing static and dynamic entries.

Explore how to create and manage VLANs to segment networks, using native VLANs, access and trunk ports, and inter-switch routing concepts to reduce broadcast domains and improve security.

Learn how VTP keeps VLAN databases aligned across switches, with server, client, and transparent modes, domain name and password protections, and revision-based updates warn on native VLAN mismatches.

Configure a router on a stick by creating subinterfaces for multiple vlans, applying correct encapsulation, assigning vlan-based ip gateways, and verifying connectivity across networks.

Learn how layer 2 etherchannel aggregates ports into a port channel to boost bandwidth and redundancy, and compare layer 2 versus layer 3 etherchannel and its negotiation protocols like pagp.

Configure layer 3 ether channels by turning layer 2 ports into routed links with IP addresses, assign VLAN gateways, and route between networks using rep.

Master default and static routes, including gateway of last resort and floating static routes. Grasp administrative distance and when to use static versus dynamic routing (RIP, OSPF, EIGRP).

Explore dynamic routing with RIP version 2, a distance-vector, classless protocol that uses multicast updates every 30 seconds and can originate default information in a three-router lab.

Explore dynamic routing with EIGRP, a hybrid distance-vector protocol using topology and neighbor tables, with default summarization and metrics like K values guiding path selection.

Explore how ospf uses area zero as the backbone, builds adjacencies, and conducts dr/bdr elections to determine the best routes.

Explore how OSPF multi-area networks use a backbone area zero, ABRs, and virtual links to connect multiple areas and advertise routes.

OSPF elects a designated router and a backup designated router in multi-access networks. It uses the highest IP or a loopback router ID, with priority numbers to influence the election.

This midterm lab integrates IP addressing, VLAN and VTP trunking, and static and dynamic routing (RIP and OSPF) into a router on a stick with layer 3 etherchannel and DNS.

configure a router as a dhcp server and use an ip helper address to obtain ip addresses across networks. create pools, exclusions, and reservations with gateway and dns details.

Configure nat with static, dynamic, and pat, set up private and public interfaces, create address pools, apply access lists, and troubleshoot translations in real networks.

Configure standard access control lists by permitting or denying traffic based on source addresses. Apply near the destination ACLs on interfaces, following top-to-bottom processing with implicit denial.

Master extended access lists to filter tcp traffic by source and destination addresses and ports, apply them at the appropriate interface given your topology, and respect implicit deny.

Configure named standard and extended ACLs by assigning a name instead of a number, and apply them near the destination to block a specific host.

learn the basics of wireless networks, including access points vs routers, the 2.4 gigahertz and 5 gigahertz frequencies, channel interference, placement strategies, and basic security like WPA personal.