
This section's slides are provided with this video. Tap on "Resources" and download the lecture slides in PDF format.
Explore the OSI model from the application to the physical layer with examples like email, HTTP, HTML, JPEG, and IP routing protocols, alongside the five-layer TCP/IP model.
Explore the OSI model's physical layer, detailing encoding and signaling, copper and fiber media, UTP and RJ-45 connectors, fiber types, and basic network topologies and LAN components.
This section's slides are provided with this video. Tap on "Resources" and download the lecture slides in PDF format.
This section's slides are provided with this video. Tap on "Resources" and download the lecture slides in PDF format.
Explore how switching evolved from hub-based layer one devices to dedicated bandwidth layer two switches and multi-layer switches, highlighting collision and broadcast domains, full duplex, and layer three functionality.
This section's slides are provided with this video. Tap on "Resources" and download the lecture slides in PDF format.
This section's slides are provided with this video. Tap on "Resources" and download the lecture slides in PDF format.
Explore wireless LAN topologies, including repeaters, work group bridges, outdoor bridges, and point to point or multipoint, plus mesh networks, all bridging wired and wireless networks, with throughput tradeoffs.
Examine wireless LAN architectures: autonomous APs operate independently, cloud-based Meraki centralizes management while keeping data local, and split mac with a wireless LAN controller uses capwap tunnels to centralize control.
Protect wireless LANs by authenticating users and access points, encrypting data for privacy, and applying integrity checks to prevent tampering and defend against rogue access points.
This section's slides are provided with this video. Tap on "Resources" and download the lecture slides in PDF format.
Explore IPv4 private addresses defined by RFC 1918 and memorize the ranges 10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, and 192.168.0.0 to 192.168.255.255, not routable on the internet.
At minute 1:07, I made a mistake; it takes 2 bits to come up with 4 subnets. That makes the modified subnet mask 255.255.255.192 or /26.
Finally, we end up with only 4 subnets with the following network range per subnet:
--> 200.10.5.0 - 200.10.5.63
--> 200.10.5.64 - 200.10.5.127
--> 200.10.5.128 - 200.10.5.191
--> 200.10.5.192 - 200.10.5.255
NOTE: This error has been fixed in the attached slide deck for this section.
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Learn how arp maps ip to mac addresses with broadcast requests and unicast replies, building arp tables for local delivery and gateway routing with layer two frame rewrite.
Routing protocols learn IP routes from neighboring routers, advertise them, and select best path by a metric; on topology changes, they converge by removing failed path and recalculating new route.
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Discover how OSPF route summarization reduces routing table entries by combining subnets into a single entry. Configure an area border router to advertise a supernet 172.30.0.0 with 255.255.248.0 for efficiency.
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Explore how IPv6 address assignment works, with automatic link-local addresses from the MAC via EUI-64 and routable addresses through static, stateless auto configuration, or DHCPv6 options.
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