Cisco CCNA Networking Security 200-125 Exam Complete Course

Explore the basics of the Cisco CCNA, introduce the Cisco Certified Network Associate framework, and cover essential networking concepts for the 200-125 exam.

Define computer network as several computers connected by a communication medium to share resources such as printers and files, as illustrated by a home network with a laptop and desktop.

Explore basic network types: LAN, MAN, WAN, and SAN. Note geography, cost, and devices like switches for LAN and routers for WAN.

Compare peer-to-peer and client-server network architectures, describing distributed versus central-server models, with workstations, clients, and services such as email, print, and storage servers over lan transmission medium.

Define unicast as a one-sender one-receiver transmission and illustrate its one-to-one delivery. Explain multicast as delivery to a group of members and broadcasting as a one-to-all transmission.

Explore the TCP/IP model, its layers from network to application, and how transport protocols like TCP and UDP differ in reliability, with practical application through DNS and FTP examples.

explains the seven-layer OSI model, from physical bit transmission and frames with error checking to network routing, transport segmentation and multiplexing, session management, and presentation and application layer functions.

Compare tcp/ip and osi models and explore how they transfer data on networks, reflecting theoretical and international standards for computing systems.

Explore how the internet protocol defines network addressing, distinguish IP addresses from MAC addresses, and review IPv4 and IPv6 with ARP as a key address-mapping mechanism.

Explores the difference between IPv4 and IPv6, comparing IPv4’s 32-bit, four-dot format with IPv6’s 128-bit, eight-group, colon-separated notation.

Explain public and private IPs, how an ISP assigns a unique public address, and how static IPs provide a fixed device address within a home or organization network.

Learn binary to decimal conversion through a worked example, converting a binary sequence to its decimal value (193) and outlining the steps.

Explore computer network cables as data transfer media, including unshielded and shielded twisted pair, UDP, and fiber optic cables.

Explore unshielded twisted pair (UTP) cable construction, its role in reducing electromagnetic interference, and how crosstalk impacts network signaling.

Learn how shielded twisted pair cables (STP) remove electromagnetic interference. The shield also removes this interference.

Explore the construction of coaxial cable, including the copper conductor, insulator, metallic shield, and plastic jacket, and learn how these layers enable cable connections.

Explore fiber optic cables, including core and cladding construction, plastic materials, and the differences between single mode and multimode fibers, where light carries data over long distances.

Explore network devices including hub and switch, and discuss the role of praetor and breach devices within a basic network setup.

Explore how a hub repeats incoming signals to all ports, with an active hub broadcasting signals without modification.

Learn how layer 2 switches learn MAC addresses, forward frames by broadcast then unicast, and how layer 3 switches deliver router-like functionality at lower cost.

Inspect router memory and boot process, from ROM, RAM, and flash to power-on self-test, load the operating system, and apply startup configuration while managing broadcast domains.

Explore static routing theory for IPv4, highlighting administrator-configured, manual routes using a destination network, subnet mask, and next-hop.

Configure IPv4 static routing in a hands-on lab, assigning IP addresses to interfaces across multiple networks. Verify reachability between subnets after applying subnet masks and routing configurations.

Configure an IPv6 unicast address on a specific interface or router by entering the interface, applying the ipv6 address command with the address and prefix length, and saving the configuration.

Configure static IPv6 routing by specifying destination networks and next-hop addresses, and apply the /64 prefix in practical examples.

This lecture explains router interfaces and lines, including console and auxiliary ports, global and interface configuration, ip address assignment with no shutdown, and securing access with passwords and service password encryption.

Explore CIDR and classless IP addressing, learn to determine subnet masks, network and broadcast IDs, and perform subnet calculations using fixed prefixes and slash notation.

Learn how variable length subnet masking (VLSM) optimizes IP allocation by tailoring subnets to department needs: 100, 60, and 30 addresses, reducing wastage and improving IPv4 efficiency.

Master how administrative distance values influence choosing the best routing protocol, compare different protocols, and apply AD to select optimal paths in Cisco networking.

Learn how dynamic routing protocols work, compare their practicality to static routing in production, and study examples like RIP, OSPF, and BGP inside and between autonomous systems.

Explore how routing protocols move data from one location to another, using examples such as RIP, IPX, and AppleTalk to illustrate production networking.

Analyze interior routing protocol concepts within the Cisco CCNA course, focusing on algorithms and hybrid approaches, and review referenced articles and examples such as e.a.g.

Examine the diameter concept and its policy implications in distance vector routing protocols, while noting funding duration and Group 7 references mentioned in the caption.

RIP, designed for small networks, uses metrics and the Bellman-Ford algorithm to find the best routes, supports load balancing up to four paths with equal cost.

Analyze routing information protocol versions, including v1 and v2, their classful and multicast and broadcast behavior, periodic updates, and basic authentication concepts.

Learn to configure RIPng on a router with global configuration mode, apply it on a specific interface, and verify IPv6 routing with show commands, noting multicasting and periodic updates.

Execute a RIP configuration lab to enable IPv6 unicast on interfaces, verify neighbor relationships, and troubleshoot basic routing in this Cisco CCNA course.

Explore EIGRP theory by examining neighbor relationships, multicast updates, reliable delivery, and how bandwidth, delay, and advertised distance shape feasible successors and route calculations.

Learn how EIGRP packets establish neighbor relationships through hello exchanges, and how update, query, reply, and acknowledgement packets support reliable routing.

Explore eigrp router states, including the active state seeking an alternate route and how routes may transition to different conditions under network dynamics.

Explain how EIGRP calculates metrics by using bandwidth and delay, while ignoring reliability and load by default.

Learn to configure EIGRP for IPv4 and IPv6, set the router-id on the desired interface, and apply EIGRP on a specific interface with the correct syntax.

Explore how equal-cost load balancing works and how to configure it, contrast with unequal-cost load balancing, and use feasible distance calculations and the Regus command variants for IPv4 routing decisions.

Configure EIGRP across six routers, establish neighbor relationships, and verify reachability to ensure correct routing in this practical lab.

Explore what OSPF is and how open charters, links, production stoppage, and recycling relate to large networks.

Identify the types of tables created, such as the name table and topology table, in OSPF.

Learn how OSPF forms a neighbor relationship with hello packets on multicast, how router IDs are chosen, and how DR/BDR elections use interface priority across network types.

Learn how OSPF forms neighbor relationships via multicast hello packets and how DR/BDR elections and dead and hello timers govern adjacency across point-to-point, broadcast, and non-broadcast networks.

Explore how ospf uses areas to segment routing, how external routes and costs influence inter-area paths, and how each area maintains an identical topology database.

Explore link-state advertisements in ospf: router lsa type 1, network lsa type 2, summary lsa type 3 by abr, and external lsa type 5, with aging and flooding concepts.

Explore OSPF versions. Outline SPF concepts and learn how to configure for s.p. in this module.