Network Operating System Lab Chapter 1: Introduction Presented by Dr. Souad

Objectives Define Network and Network Operating System Discuss clients, servers, and Windows network models Differentiate among the editions of Windows Server 2008 Identify Windows Server 2008 hardware requirements Discuss the new Windows Server 2008 technologies

Network Benefits

Role of Computers in Network

Types of Network

Network Operation system

Clients, Servers, and Windows Network Models Workgroup Network of computers that allow each other access to their files, printers, or Internet connection By default, all Windows Server 2008 computers are placed in a workgroup named WORKGROUP Membership status Either a single workgroup or a domain

Domain Model with Active Directory Group of users and computers managed by the same security database Active Directory Domain Services (AD DS) Technology that runs the domain security database Domain controllers (DCs) Servers that hosts domain security database Domain Name System (DNS) TCP/IP-based standard for resolving computer names with IP addresses

Windows Server 2008 Editions General editions of Windows Server 2008 Enterprise, Datacenter, and Standard Editions designed for special-purpose server applications Web Server and HPC Server

Windows Server 2008, Standard Edition Designed for smaller environments and single-purpose installations Works as a single domain server for a small business or A single file/application server in larger environments

Windows Server 2008, Enterprise Edition Features not available with SE (Standard Edition) Significant increase in maximum allowable memory Failover clustering Installation of up to four virtual machines on each physical host

Windows Server 2008, Datacenter Edition Additional features Ability to run up to 32 processors Ability to hot-add and replace processors Installation of unlimited virtual machines on each physical host

Windows HPC Server 2008 Designed for high-performance computing (HPC) applications Accommodates up to thousands of processing cores because it is built on the Server 2008 64-bit architecture model

Windows Server 2008 Hardware Requirements Microsoft provides minimum and recommended hardware requirements for installing its operating systems Minimum requirements Let you install and run a system using minimal resources and services

32-Bit and 64-Bit Processors 64-bit architectures Have greater theoretical limit for processing data Can handle twice the amount of data of a comparable 32-bit product

Some New Technologies in Windows Server 2008 This section introduces the following technologies and enhancements Improved installation process Hyper-V Network Access Protection

Improved Installation Process Requires minimal user input You no longer have to wait for the installation program to ask for information Networking information, regional settings, and other settings

Hyper-V Virtualization Allows you to run one or more separate instances of an OS within a single host OS Allows organizations to consolidate these physical systems onto high-powered servers

Network Access Protection Helps to protect networks, both public and private, from malware such as viruses and spyware Threat sources Employees accessing the Internet from work and inadvertently install Trojan horses Isolate access to connections from external networks that create a gateway for viruses Guest (Visitors) computers accessing an internal network that introduce malware to the network

Summary Most modern networks are based on client-server computing Windows Server 2008 offers three general editions and two special-purpose editions Windows Server 2008 Standard Windows Server 2008 Enterprise Windows Server 2008 Datacenter Windows Web Server 2008 Windows HPC Server 2008

Summary (continued) Windows Server 2008 Available for both 32-bit and 64-bit hardware architectures New technologies in Windows Server 2008 Focus on improving the performance, manageability, and security of networks Server Manager Provides administrators with a GUI console for managing roles and features Has a look and feel similar to Windows Vista