ENVS 1200 Lecture Notes - Lecture 20: Internet Protocol Suite
13 May 2018
School
Department
Course
Professor
ENVS 1200 Lecture 20 Notes – Networks and data communications
Introduction
• It is almost impossible to find a piece of computer-based equipment operating by itself,
without connection to other computers.
• This is true of laptop and desktop computers, PDAs, cell phones, automobile computers,
even satellite TV receivers and other computer-embedded devices.
• Computer networks are an essential part of the infrastructure of modern systems.
• Indeed, it would be fair to say that the Internet is an essential part of modern society as
a whole.
• A careful, detailed overview of the essential features of networking
• We consider the basic requirements for communicating data through a network.
• Topics include the definition and nature of communication channels; the two layered
models
• TCP/IP and OSI, which together with Ethernet are the basis for nearly all networking
• The various types of addresses—port numbers, domain names, IP addresses, and MAC
addresses—that are used to make global communication possible
• And the various types of networks, including local area, metropolitan area, and wide
area networks, and the Internet.
• We observed that a network connected to a computer could be viewed from the
perspective of the computer simply as another I/O device.
• Indeed, for many purposes, this is an attractive and appropriate choice.
• As users, e don’t really care if a file that e are using is stored on a local disk drie or
on a netork serer located halfay ’round the orld, provided the file is readily
accessible.
• As long as we can retrieve our printouts conveniently, it is not important to us that our
printer is actually an office printer being shared by others.
• Shown again we viewed the network as a cloud.
• To each computer the cloud is simply another source of I/O.
find more resources at oneclass.com
find more resources at oneclass.com
