TCP & UDP
This video builds on redundancy protocols by showing how to configure and verify the protocols in a multi-router setup, ensuring network resilience if one router fails. It demonstrates the step-by-step commands to set up failover, how to monitor which router is active vs standby, and how to test the setup to confirm seamless transition when a router goes down. The lesson emphasizes why redundancy is critical for real-world networks — helping prevent downtime and ensuring continuous connectivity for end-hosts.
Wireshark Demo (TCP/UDP)
This video explains and demonstrates how to configure the Hot Standby Router Protocol (HSRP) in a network to provide gateway redundancy. It walks through the commands that set up a “virtual” IP and MAC address shared by two (or more) routers, allowing one to act as active and the other as standby — so if the active router fails, the standby automatically takes over. The lab also includes verifying the status, adjusting priority, enabling pre-emption, and testing failover, illustrating how HSRP ensures continuous network availability and reliability for hosts. This is a key concept for building fault-tolerant and resilient networks, especially in enterprise or critical-infrastructure environments.
IPv6 Part 1
This video explains how Hot Standby Router Protocol (HSRP) works to provide redundancy for a network’s default gateway. It shows how two or more routers can share a “virtual” IP and MAC address so that hosts on the LAN always see the same gateway — even if the primary router fails. The lecture covers how routers negotiate which one becomes “active” versus “standby,” how to configure HSRP on Cisco devices (including setting priority and enabling pre-emption), and how failover happens automatically and transparently to end-devices. Understanding HSRP helps ensure high availability and uninterrupted connectivity in enterprise-grade or multi-router network designs.
Configuring IPv6 (Part 1)
This video explains how HSRP works to provide redundancy for a network’s default gateway. It shows how multiple routers can be configured to share a virtual IP address and MAC address, so that all hosts on a LAN send their traffic to what looks like a single router. One router is elected as the “active” router — forwarding traffic — and another as “standby,” ready to take over if the active router fails. This ensures that connectivity continues seamlessly even if a router or link goes down, helping avoid a single point of failure in network design.
IPv6 Part 2
This video focuses on first-hop redundancy protocols (FHRP), specifically comparing and explaining how HSRP, VRRP, and GLBP work to provide network gateway redundancy. It covers how each protocol enables multiple routers to act as a virtual default gateway — ensuring that if one router fails, another automatically takes over — and outlines their differences (e.g., election process, failover behavior, load balancing). The video helps you understand how to configure these protocols, why they matter for network availability, and when to use each.
Configuring IPv6 (Part 2)
This video shows how to configure IPv6 addresses and IPv6 static routes on routers, giving a hands-on lab approach to applying IPv6 addressing in real network setups. It walks through assigning IPv6 addresses to interfaces, enables static routing for IPv6 networks, and verifies connectivity to ensure the configuration works correctly.
IPv6 Part 3
This video introduces key concepts of IPv6 — including its address format, prefix notation, and fundamental differences from IPv4 — and explains why IPv6 is important for modern networks. It covers how IPv6 addresses are structured, how to interpret and write them, and the basics of configuring IPv6 on network devices.
Configuring IPv6 (Part 3)
This video walks you through a hands-on lab for configuring IPv6 on network devices. It shows how to assign IPv6 addresses to interfaces, enable IPv6 routing or static IPv6 routes where needed, and verify connectivity under IPv6. The lab helps you transition from IPv4 basics to actual IPv6 implementation — a vital step for working with modern networks and a necessary skill for the certification.
Standard ACLs
This video covers the use of standard Access Control Lists (ACLs) — how to configure, apply, and test them on routers or switches to control traffic flow based on IP addresses. It guides you through the actual commands needed to define ACL rules, apply them to interface inbound or outbound directions, and verify that unwanted traffic is blocked while legitimate traffic passes.
Standard ACLs (Part 2)
This video covers extended Access Control Lists (ACLs) on Cisco devices — showing how to configure both numbered and named ACLs that can filter traffic more granularly than standard ACLs by matching not just source IPs, but also protocol type (TCP/UDP/ICMP), source/destination IP addresses, and even TCP/UDP port numbers. It demonstrates command syntax, how to reorder or resequence ACL entries, and walks through several example ACL entries (like blocking HTTP or restricting specific hosts
Extended ACLs
This video teaches how to configure and use extended Access Control Lists (ACLs) on Cisco devices — a more powerful and flexible type of ACL that allows you to filter network traffic based not only on source IP, but also on destination IP, protocol type (TCP, UDP, ICMP, etc.), and even specific port numbers (e.g. HTTP, SSH). It walks through creating numbered (or named) extended ACL entries, applying them to interfaces (inbound or outbound), and testing to confirm that traffic is permitted or blocked as intended. Because of their granularity, extended ACLs let network administrators enforce detailed security and traffic‑control policies.
Extended ACLs (Part 2)
This video guides you through a lab exercise that demonstrates how to configure multiple extended Access Control Lists (ACLs) on Cisco devices. It shows how to create ACL rules that permit or deny traffic based on combinations of criteria — including source and destination IP addresses, protocol type (TCP/UDP/ICMP), and even specific ports. The lab also covers applying ACLs to router or switch interfaces (inbound or outbound) and testing connectivity to verify correct behavior.
CDP & LLDP
This video introduces the Layer‑2 discovery protocols Cisco Discovery Protocol (CDP) and Link Layer Discovery Protocol (LLDP). It explains how both protocols allow network devices to discover and share information about directly connected neighbors (device type, interface, IP management address, capabilities, etc.) — helping network administrators quickly map out network topology and troubleshoot connectivity. The tutorial covers how to configure CDP (on Cisco devices) and LLDP (vendor‑neutral) and how to verify their operation using show commands.
CDP & LLDP (Part 2)
This video walks you through a lab exercise using the discovery protocols Cisco Discovery Protocol (CDP) and Link Layer Discovery Protocol (LLDP). It shows how to enable these protocols on switches and routers so that each device can automatically detect and report information about its neighbors — such as device type, interface connections, IP management addresses, and capabilities. The lab then demonstrates how to use show‑commands to verify the neighbor relationships, making CDP/LLDP useful tools for mapping network topology and troubleshooting connectivity issues quickly. These protocols help network administrators get a clear view of how devices connect and interact.
NTP
This video explains the role of Network Time Protocol (NTP) in synchronizing time across all devices in a network — routers, switches, servers — so that logs and timestamps remain consistent. It shows why accurate time is essential (e.g., for troubleshooting, correlating event logs), discusses how device internal clocks can drift if left unsynchronized, and demonstrates how to configure NTP on network devices (including server/client setup and time‑zone settings). The lesson covers NTP hierarchy and the concept of stratum levels, and walks through actual commands to configure and verify NTP synchronization on routers, making it a practical and important skill for network management.
NTP (Part 2)
This video walks you through a lab showing how to configure Network Time Protocol (NTP) in a multi‑router network setup. It demonstrates how to have one router sync its clock to a public NTP server (over the Internet) and then configure other routers to synchronize to that router — creating a chain of time synchronization across the network. The lesson covers important commands (e.g. ntp server …, ntp source loopback, time‑zone settings, and updating the hardware clock), and emphasizes why synchronized time is critical: consistent timestamps help make device logs comparable and useful for troubleshooting. By the end, you learn how to practically implement accurate, network‑wide timekeeping.
DNS
This video explains the role of the Domain Name System (DNS) — the system that translates easy‑to‑remember domain names (like “google.com” or “youtube.com”) into numerical IP addresses that computers use to communicate. It shows how a DNS lookup works (client → DNS server → name resolution → IP address), how devices can cache DNS results for faster subsequent lookups, and demonstrates how to configure DNS settings on both end‑hosts and network devices (e.g. on a Cisco router using IOS) when needed. The video also covers Windows‑based commands like ipconfig /all and nslookup to inspect DNS configuration and test name resolution — practical skills helpful for troubleshooting and network administration.
DNS (Part 2)
This video explains how the Domain Name System (DNS) works — translating human‑friendly domain names (like example.com) into machine‑usable IP addresses that devices can route packets to. The instructor walks through how DNS lookups happen (client → DNS server → receive IP), how name resolution simplifies internet and network usage, and touches on how DNS configuration looks on routers or end‑hosts. The lesson also shows how to use tools like nslookup to test DNS resolution and verify that DNS is functioning properly. Understanding DNS is essential for networking and for managing or troubleshooting real networks.
DHCP
This video walks you through a lab showing how to configure Network Time Protocol (NTP) across a network — teaching you how to set one router as an NTP server (often syncing to a public time source) and then configure other routers/switches to synchronize from that server. It demonstrates the actual commands used (like ntp server …, time‑zone settings, source interfaces, etc.) and shows how to verify that all devices are properly time‑synced. Accurate, network‑wide time synchronization is vital for consistent logging and troubleshooting.
DHCP (Part 2)
This video offers a hands‑on lab showing how to configure the DHCP (Dynamic Host Configuration Protocol) on network devices. It walks you step‑by‑step through setting up a DHCP server on a router or switch, defining IP address pools, setting gateway and DNS information, and configuring client devices to receive their IP configuration automatically. The lesson emphasizes the practical commands and verification steps, demonstrating how DHCP simplifies IP management for hosts and ensures proper network connectivity