TCP/IP Addressing 100% LABS Hands On Experience.

Download and install Cisco Packet Tracer to simulate DHCP labs; register for a free download, log in, and launch the latest version (8.22) for use later in the course.

Explore the fundamentals of TCP/IP addressing, including IPv4 32-bit addresses, four octets, and binary-to-decimal conversion, with class A–E examples and host concepts.

Identify TCP/IP class A, B, and C by first octet ranges and their masks (/8, /16, /24). Note class D multicast, class E research, loopback 127.0.0.1 and unicast, multicast, broadcast.

Explore class B addressing and identify the 16-bit network and 16-bit host portions with the 255.255.0.0 subnet mask (/16). Understand first and last hosts, broadcast, and 65,534 hosts per network.

Explore class a addressing, where the first octet forms the network and the last three form the host, and remember class a ranges 1 to 127.

Learn about class d and class e IP addresses, their multicast and research roles, and the ranges 224 to 239 and 240 to 254, with notes on future subnetting.

Explain the difference between private and public networks on a LAN using private ranges (192.168.x.x, 172.16.x.x, 10.x.x.x) and 169.254.x.x, and outline how DHCP and NAT connect private to public IPs.

explains how network address translation translates private addresses to public addresses for internet access, using internal and external interfaces, and demonstrates static nat and pat concepts.

Explore dynamic NAT, using a public IP pool and three commands to translate private addresses via an access list, showing one-to-one mappings before switching to PAT.

Explain port address translation (pat) by mapping many private addresses to a single public ip using distinct port numbers, allowing multiple devices to share one ip.

Configure a dhcp server in Cisco Packet Tracer, connect devices via a switch, and observe dhcp broadcasts assign ip addresses and validate with ipconfig release/renew.

Set up two dhcp servers on different networks, configure gateways and dns, and observe how ipconfig release renew may select either server; learn how to secure dhcp in next lecture.

Secure the dhcp server by enabling ip dhcp snooping on a Cisco switch and designating the trusted port connected to that server to prevent hackers' network from distributing addresses.

Set up dhcp on a Cisco router in packet tracer, enable interfaces, configure a dhcp pool with gateway and dns, exclude the router ip, and verify with ipconfig and ping.

Configure dhcp on a router to support multiple broadcast domains using two interfaces on separate networks (100 and 200) with distinct pools and gateways.

Learn to set up a DHCP relay on a Cisco router using ip helper-address to forward DHCP requests from one network to a central DHCP server across segments.

Configure dhcp for multiple vlans by creating vlan 10, 20, 30 with subinterfaces and dot1q, then configure per-vlan dhcp pools with gateways 10.254, 20.254, 30.254.

Explore how tcp and udp differ and how ports and sockets enable connections with ip addresses, including 80, 443, 53, 21, and 25, plus system and dynamic nat/pat ports.

Compare tcp and udp, use netstat to view open ports like 3389 for remote desktop and 445 for file sharing, and understand how port numbers influence connectivity and security.

Change the default RDP port from 3389 to 5555 by editing the registry, restart the server, and verify the new port with netstat while securing access with firewall rules.

Learn subnetting a class c network by subnetting 192.168.100.0/24 into eight /27 subnets, each with 30 usable hosts, using 255.255.255.224 and network, first/last host, and broadcast concepts.

Subnet a class C network to create 14 networks by borrowing four bits, yielding a /28 mask and 14 hosts per network with private and ISP public IP examples.

Learn to reverse engineer class C subnetting by deducing network IDs, borrowed bits, and host ranges from an address and mask, with examples of /26 to /30.

Master class b subnetting using the private 172.16.0.0 network and the default /16 mask, borrowing bits from the third octet to form subnets, with /21 and /23 examples.

Explore subnetting a class B network to maximize networks and hosts, borrowing bits to create 1024 subnets with 62 hosts each, using /26 and /28 CIDR masks.

Reverse engineer class B subnetting using CIDR notation and subnet masks to identify network IDs, first and last hosts, and broadcasts, with VLAN concepts.

Learn to subnet a class A network by borrowing bits from the second octet, creating networks with cidr slash 13 or 15, and calculating hosts and broadcasts using 255.248.0.0.

Demonstrate subnetting a class a network by borrowing bits to form 256 networks within 10.0.0.0/8, treated as a class b subnet with /16 cidr and 65,534 hosts per network.

Master reverse engineering a class A network to master subnetting through hands-on masks, network IDs, and broadcasts, with quizzes to reinforce identifying hosts, networks, and wildcards.

Explore how vlans relate to subnetting and how a switch uses mac addresses to separate devices into department-based networks, reducing traffic and improving security.

Set up a topology with multiple VLANs, assign each VLAN its own subnet using subnetting and VLSM, and configure DHCP and switches to enforce inter-VLAN isolation.

Conclude by outlining TCP/IP addressing and subnetting foundations, including classful vs classless networks, CIDR, VLSM, DHCP, static and dynamic IPs, and TCP/UDP port basics with hands-on packet tracer practice.