The Blog Channel

  Objectives Part 1: Examine Network Requirements Part 2: Design the VLSM Address Scheme Part 3: Cable and Configure the IPv4 Network Context / Scenario The Variable Length Subnet Mask (VLSM) was created to prevent IP addresses from being wasted. A network is subnetted and then re-subnetted using VLSM. This procedure may be done indefinitely to establish subnets of varying sizes depending on the number of hosts necessary in each subnet. Address planning is required for effective utilization of VLSM. In this lab, you will utilize the network address 192.168.33.128/25 to create an address scheme for the network seen in the topology diagram. VLSM is used to address IPv4 addresses. After you've created the VLSM address scheme, you'll configure the routers' interfaces with the necessary IP address information. Addresses will need to be assigned to the future LANS at BR2, but no interfaces will be setup at this time. Cisco 4221 routers running Cisco IOS XE Release 16.9.4 are util...

  11.6.6 Lab – Calculate IPv4 Subnets  Objectives Part 1: Calculate IPv4 Subnetting Calculate IPv4 Address Subnetting in Part 2 Context / Scenario Understanding how IPv4 networks function requires the ability to deal with IPv4 subnets and derive network and host information based on a given IP address and subnet mask. The first section is intended to remind how to get network IP address information from an IP address and subnet mask pair. When provided with an IP address and subnet mask, you may deduce further information about the network. Note from the instructor: This task may be completed in class or as homework. If the task is completed in class, you may opt to have students work alone or in pairs. It is advised that the first issue be solved in class to provide assistance to students on how to continue with the remainder of the assignment. Cisco owns the public IP addresses used in this lab. Question of Reflection What is the significance of the subnet mask when examinin...

Objectives Part 1: Initialize Devices and Configure the Topology Configure Devices and Verify Connectivity in Part 2 Context / Scenario This is a thorough lab that goes over previously covered IOS commands. You will wire the equipment in this lab according to the topology diagram. The devices will then be configured to match the addressing table. After you've saved your settings, you'll validate them by checking for network connection. After configuring the devices and verifying network connection, you'll use IOS commands to get information from the devices in order to answer questions about your network equipment. This lab gives just a cursory overview of the instructions required to set up the router. Assess your knowledge by configuring the devices without consulting the material or past activity. Cisco 4221 routers running Cisco IOS XE Release 16.9.4 are utilised in the CCNA hands-on labs (universalk9 image). Cisco Catalyst 2960 switches running Cisco IOS Release 15.2(2...

  Objectives Part 1: Configure and Build the Network Examine the Switch MAC Address Table in Part 2 Context / Scenario A Layer 2 LAN switch's primary function is to transmit Ethernet frames to host devices on the local network. The switch keeps track of all visible host MAC addresses on the network and maps them to its own Ethernet switch ports. This is referred to as creating the MAC address database. When a switch gets a frame from a PC, the source and destination MAC addresses of the frame are examined. The MAC address of the source is saved and mapped to the switch port from which it originated. The target MAC address is then retrieved from the MAC address database. If the destination MAC address is known, the frame is forwarded out of the switch port that corresponds to that MAC address. If the MAC address of the frame is unknown, it is broadcast from all switch ports except the one from which it originated. It is critical to watch and understand how switches operate and how t...