tailieunhanh - Basic Networking Concepts

-A network can be defined as a group of computers and other devices connected in some ways so as to be able to exchange data. -Each of the devices on the network can be thought of as a node; each node has a unique address. -Addresses are numeric quantities that are easy for computers to work with, but not for humans to remember. Example: -Some networks also provide names that humans can more easily remember than numbers. Example: , corresponding to the above numeric address. Internet address Consists of 4 bytes separated by periods Example: -The R first bytes. | Basic Networking Concepts 1. Introduction 2. Protocols 3. Protocol Layers 4. Network Interconnection Internet 1 1. Introduction -A network can be defined as a group of computers and other devices connected in some ways so as to be able to exchange data. -Each of the devices on the network can be thought of as a node each node has a unique address. -Addresses are numeric quantities that are easy for computers to work with but not for humans to remember. Example -Some networks also provide names that humans can more easily remember than numbers. Example corresponding to the above numeric address. 2 Addressing Internet address Consists of 4 bytes separated by periods Example -The R first bytes R 1 2 3 correspond to the network address -The remaining H bytes H 3 2 1 are used for the host machine. -InterNIC Register organization in charge of the allocation of the address ranges corresponding to networks. -Criteria considered Geographical area country Organization enterprise Department Host Domain Name System DNS -Mnemonic textual addresses are provided to facilitate the manipulation of internet addresses. -DNS servers are responsible for translating mnemonic textual Internet addresses into hard numeric Internet .