Address Autoconfiguration, DNS, and ICMP

Networking    |    Intermediate
  • 31 Videos | 43m 4s
  • Includes Assessment
  • Earns a Badge
Every device that communicates in a TCP/IP network must have an IP address configured. The most efficient way to configure end devices in the network is to do so automatically. The Dynamic Host Configuration Protocol is used for such automatic configurations. In this course, you'll explore the disadvantages of static IP configuration and the steps for autoconfiguration using DHCP. You'll also learn about DHCP, including the message format, scopes, renewal process, how it works in a routed network, and troubleshooting techniques. The sheer volume of resources available on the Internet and enterprise networks is astounding. Trying to remember the IP address of even a fraction of these resources would be quite difficult. However, we can assign names to these resources and use the Domain Name System to translate easy to remember names into their specific IP addresses. In this course, you'll also learn about the organizations that coordinate the global DNS. You'll explore the organization and structure of the DNS namespace, the types of top level domains, the purpose of the root name servers and primary and secondary name servers, the DNS name resolution process, and the DNS message format. You'll also learn to match the abbreviations with the resource record function when give a list of resource record abbreviations. Finally, you'll examine the advantages of DDNS and DNS troubleshooting tools. The size and complexity of modern networks almost ensures that problems will sometimes occur in the delivery of IP packets. The Internet Protocol provides a mechanism for reporting error information when those problems arise. The Internet Control Messaging Protocol provides for diagnostic and error reporting in a TCP/IP network. You'll learn how ICMP provides error reports and diagnostic messages. You'll explore the layout of ICMP messages, as well as the common ICMP message types and their functions. You'll also learn to recognize several common types of ICMP messages by examining output from a protocol analyzer. Finally, you'll examine how the ICMP time exceeded message is used with traceroute. This course was originally created by Global Knowledge (GK). 

WHAT YOU WILL LEARN

  • recognize that DHCP supports auto configuration and runs over UDP
    differentiate between manual and automatic IP address assignment
    recognize how automatic configuration was handled historically
    describe the Dynamic Host Configuration Protocol (DHCP)
    recognize the four steps of the DHCP new lease acquisition process
    describe the DHCP message format and the fields that are included
    describe DHCP scopes and options, including their uses
    recognize how the IP lease renewal process works
    recognize how DHCP lease acquisition works in a routed network
    recognize how to properly configure multiple DHCP servers to avoid duplicate addresses
    recognize how to troubleshoot some common DHCP problems
    recognize the organizations that are involved in the global namespace and IP addressing management for the Internet
    describe the DNS namespace
    recognize the role of DNS name servers in the global DNS system
    recognize the role of the resolver function
    describe the DNS name resolution process
  • recognize the elements that make up the message format for DNS
    recognize the types of elements you would find in a zone file on a DNS server
    describe the purpose of reverse lookup
    recognize how dynamic DNS can be used to reduce administrative overhead
    recognize command line utilities that can be used to troubleshoot DNS
    describe the role of the Internet Control Messaging Protocol (ICMP) in TCP/IP networks
    recognize the services provided by ICMP
    recognize the situations cause messages to be sent to specific destinations
    differentiate between silent and informed discard
    recognize the format of ICMP error and diagnostic messages
    recognize the ICMP types and related codes for the most common types of ICMP messages
    recognize why echo request and echo reply are important diagnostic messages for troubleshooting TCP/IP networks
    recognize the destination unreachable message and some of the codes defined for this type of message
    recognize the purpose of the ICMP redirect message
    describe the ICMP time exceeded message, including the situations where it is sent

IN THIS COURSE

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