/**
 * \mainpage An Introduction to ns-3
 *
 * The ns-3 library is split across multiple modules:
 *     - core: located in src/core and contains a number of facilities which
 *       do not depend on any other module. Some of these facilities are
 *       OS-dependent.
 *     - simulator: located in src/simulator and contains event scheduling
 *       facilities.
 *     - common: located in src/common and contains facilities specific
 *       to network simulations but shared by pretty much every model
 *       of a network component.
 *
 * The "core" module contains:
 *    - a Functor class: ns3::Callback
 *    - an os-independent interface to get write-only access to a file: ns3::SystemFile
 *    - an os-independent interface to get access to the elapsed wall clock time: ns3::SystemWallClockMs
 *    - a class to register regression tests with the test manager: ns3::Test and ns3::TestManager
 *
 * The "simulator" module contains:
 *    - a time management class to hold a time and convert between various time units: ns3::Time
 *    - a scheduler base class used to implement new simulation event schedulers: 
 *      ns3::Scheduler and ns3::SchedulerFactory
 *    - a simulator class used to create, schedule and cancel events: ns3::Simulator
 *
 * The "common" module contains:
 *    - a packet class to create and manipulate simulation packets: ns3::Packet and ns3::Chunk
 *    - a trace container class to hold lists of trace sources: ns3::TraceContainer
 *    - a Pcap file serializer which can generate pcap files from simulation packets: ns3::PcapWriter
 */
/**
 * \namespace ns3
 * \brief Every class exported by the ns3 library is enclosed in the
 * ns3 namespace.
 */