Networks I.ppt

1、Networks I,Chapter 15,Chapter Objectives,Understand basic network terminology. Understand the basics of the TCP/IP protocol suite. Understand the basics of IP addresses. Understand basic IP routing. Understand the basics of ARP, and DNS. Understand the basics of layer 2 and layer 3 “routing”. Unders

2、tand common network hardware.,Network Protocols,Internetworking - the process of connecting two computer networks together. The interconnected networks may or may not use the same network technology. The interconnected networks may or may not be in the same location. The interconnected networks may

3、or may not encompass the same hardware. The interconnected networks may or may not employ the same software. The Internet is one example of internetworking.,Network Protocols,WARNING: Networking seems to encompass every two, three, four, five, and six character combination of letters into an acronym

4、.,Network Protocols (ISO),The International Standards Organization adopted a networking model called the Open System Interconnect. This network model breaks the task of networking down into seven layers (then arranged them like a top-ten list): 7) Application layer - Provide end-user services 6) Pre

5、sentation Layer - Deal with problems bandwidth is wasted) The ATM cell size is a poor choice for data (packets are too small; bandwidth is wasted with excessive overhead). Welcome to the fascinating world of International Standards!,Summary,Configuration, management, and troubleshooting network connections is a major portion of any system administrators job. The system administrator needs to: Understand basic network terminology. Understand the basics of the TCP/IP protocol suite. Understand the basics of IP addresses. Understand basic IP routing. Understand the basics of ARP, and DNS