VLSM, ARP, and Multicasting

Networking    |    Intermediate
  • 29 videos | 51m 22s
  • Includes Assessment
  • Earns a Badge
Subnetting is the practice of dividing a given block of addresses into sub-units. This is done to meet organizational, security, and performance needs. In this course, you'll learn the differences between fixed-length subnet masks and variable-length subnet masks. You'll explore how subnet values are calculated and how to use VLSM to subnet a given block address. Finally, you'll learn how VLSM relates to Classless Inter-Domain routing. Address Resolution Protocol is a fundamental protocol that maps an IP address to a target MAC address. In this course, you'll also learn the purpose of address mapping, the characteristics of the ARP cache, and ARP commands. In addition, you'll learn about each of the fields in an ARP message and other ARP capabilities. While the majority of network communications gets done using a one-to-one transmission, some forms of communication are better served using a one-to-man transmission, like a television broadcast. The Internet Protocol supports this one-to-many type of communication with the Internet Group Management Protocol. You'll learn about the uses of multicasting and its main characteristics. You'll also explore the role of IGMP in multicasting and how multicast routing works. This course was originally created by Global Knowledge (GK).


  • recognize goals, rules, and design considerations for subnetting
    differentiate between fixed-length subnet masking and variable-length subnet masking
    recognize the formulas used for calculating subnet values
    recognize situations where you would choose VLSM to meet organizational needs
    recognize the process involved in creating the first subnet
    determine the four key addresses for the first subnet
    recognize the process involved in creating the second subnet
    determine the four key addresses for the second subnet
    recognize the process involved in creating the third subnet
    determine the range of addresses and the four key addresses for the third subnet
    recognize how to avoid sequential allocation errors
    recognize the cause of sequential allocation errors
    determine the key addresses for a fourth future subnet
    recognize the proper place to start subnetting for a fourth future subnet
    recognize how CIDR and VLSM can be used for a company with regional and district offices
  • recognize the purpose of the Address Resolution Protocol (ARP) and where it is used
    recognize restrictions when using ARP
    recognize the purpose of the ARP cache and the types of entries it contains
    recognize some ARP commands and describe their purpose
    recognize ARP message fields and their purpose
    describe gratuitous ARP
    describe the concept of multicasting and how it differs from unicast and broadcast
    recognize the situations where multicast is a useful alternative to unicast and broadcast
    recognize important characteristics of multicasting
    recognize how Internet Group Management Protocol (IGMP) is used to manage multicast groups
    recognize the requirements of joining multicast groups
    recognize protocols a router must support in order to support multicasting
    map a Class D IP address to an Ethernet multicast address
    recognize how multicasting can be used with a real-world example



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