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• The Anatomy
  of an Ethernet Frame
  
  Explanation of the structure
  of data on a network.
  
  
• ARP
  and The Ethernet Header
  
  Closer examination of
  the header and the means of identifying the sender
  and recipient of a data frame.
  
  
• What
  is CSMA/CD and how does it work?
  
  How Ethernet handles traffic
  from multiple sources and how it resolves collisions.
  Also, how CSMA can be of use in network monitoring.
  
  
• Understanding
  Full and Half-Duplex Ethernet
  
  Builds on the CSMA/CD
  subsection. Explains Ethernet cabling, how full and
  half-duplex mode differ, and how they are related to
  collision detection.
  
  
• Measuring
  Ethernet Performance
  
  Explanation of different
  metrics for determining performance on an Ethernet
  network, and how each is affected by the others.

Working
with TCP/IP

This section will discuss various aspects of IP
addressing, and how addresses are divided into network and host sections via
subnet masking. Does not assume knowledge of the previous sections.

• Working with Subnet
  Masks
  
  How a host determines
  if another system is local or not; decoding IP addresses
  into their binary equivalents; Class A, B, and C IP
  addresses and default subnet masks.
  
  
  
• Intro to Variable
  Length Subnet Masking
  
  How to use subnet masks
  to divide networks to change the number of subnets
  and hosts.
  
  
  
• Advanced Variable Length
  Subnet Masking
  
  Builds on the Intro to
  VLSM subsection. Discusses ways of using VLSM
  to ensure that address space is used in the most
  efficient way.

Working
with TCP/IP Services

This section discusses two major TCP/IP services:
Domain Name Services (DNS), which handle the relationship between domain names
and IP addresses, and File Transfer Protocol (FTP), which is used for moving
files via the Internet. Does not assume knowledge of the previous sections.

• Domain Name Services
  
  DNS hierarchy; BIND; nslookup;
  different record types used in DNS; troubleshooting
  DNS problems; Start of Authority; how a name request
  gets passed along the DNS "food chain."
  
  
  
• Active vs. Passive FTP
  
  Explanation of File Transfer
  Protocol, one of the most difficult protocols
  to understand with respect to how servers and
  clients talk to each other; differences between
  active and passive FTP and the implications of
  each with respect to security.