ITI-510 Computer Networks ITI 510 – Computer Networks Meeting 6 Rutgers University Center for Applied Computer Technologies Instructor: Chris Uriarte

ITI-510 Computer Networks Agenda Network Computing with Microsoft Operating Systems Popular Internet Protocols –HTTP –SHTTP/SSL –SMTP –FTP –Telnet –SSH Project Overview Questions

ITI-510 Computer Networks Network Computing with Microsoft Operating Systems Microsoft Operating Systems make up the majority of the operating systems install base in the world today. There are a number of different types of MS Operating systems: HomeBusinessServer Windows 3.1 (o)Windows For Workgroups 3.11 (o) Windows NT Server (o) Windows 95 (eol)Windows NT Workstation 4.0 Windows NT Server 4.0 Windows 98/98SEWindows 2000 Professional Windows 2000 Server Windows MEWindows XP Professional Windows.NET Server (coming soon) Windows XP (o) – obsolete (eol) – end of life

ITI-510 Computer Networks Networking Support in MS Operating Systems Since the release of Windows for Workgroups 3.11, MS Operating systems have supported networking as a core operating system feature. All modern Microsoft OS’s support a number of network protocols – most importantly, they support TCP/IP TCP/IP now forms the foundation for network-based computing environments running Microsoft technologies.

ITI-510 Computer Networks Networking Support, con’t We can say that Microsoft OS’s support three classes of network protocols: –Standard Protocols – such as TCP/IP –Third Party Vendor Protocols – such as Novell’s IPX –Microsoft-Specific Protocols – such as Netbios All modern Microsoft OS’s support a modular network kernel architecture, which allows the operating system to support new protocols as they are introduced and developed.

ITI-510 Computer Networks OSI Layer Responsibilities in Relation to MS Operating Systems Application Layer Transport Layer Network Layer Data Link Layer Physical Layer Handled by the application itself (web browser, mail client, etc.). May be distributed with the operating system or by a third party. Handled by a “Protocol Driver” in the operating system. Windows includes a number of supported transport protocols. Handled by a “Protocol Driver” in the operating system. Note: A single protocol driver may handle both Transport and network layer protocols, as in TCP/IP Handled by the network device driver. For example, an Ethernet driver tells the OS how to form Ethernet packets and pass then to the Ethernet card (NIC) Represents the physical hardware (NIC, cables, etc.)

ITI-510 Computer Networks Network Configuration in Windows Windows provides a graphical interface to manage basic network related settings. Windows allows a user to: –Install drivers for NICs –Install protocol drivers for specific Protocols (TCP/IP) –Configure individual protocols (Such as IP Address and Network Settings) The starting point for Network configuration is Start->Settings->Control Panel->Networks –Specific verbiage may vary. For example, the Windows 2000 control panel applet is called “Networking and Dial-up Connections”

ITI-510 Computer Networks Network Properties The general network properties dialog box looks like this: NIC Installed Protocols and Network Components Installed

ITI-510 Computer Networks Configuring Protocols Properties Protocols can be configured by highlighting a protocol and choosing “Properties”: TCP/IP Properties Used to specify IP address Info Tells your computer to use DHCP Address of DNS Servers

ITI-510 Computer Networks Microsoft Networking There are three models that can be used for Windows based computers related to Microsoft- specific networking: –Standalone – a computer that does not use any networking components or a computer that does not have any interaction or dependency on other computers on a network. –Workgroup Environment – a peer-to-peer environment that where computers are segmented into “Workgroups”, mainly used to organize and efficiently catalog computing resources on a network. –Domain Environment – a highly-advanced network computing infrastructure that utilizes a centralized user database and authentication methodology. Users must authenticate onto to the domain to get access to computing resources. –Note: A Windows computer must be one and only one of the above.

ITI-510 Computer Networks Microsoft Windows Domains A Windows domain environment utilizes a central user database, which contains user information, including access rights and passwords. Computers are configured to “join” the domain. The central user database is contained on a domain controller (must be a Windows NT Server or Windows 2000 server machine). When a user logs into a local PC or attempts to access network resources, credential information is passed to the domain control, which authorizes or denies access to a requested resource. The standard in corporate computing environments. Allows for central administration of user access rights and passwords.

ITI-510 Computer Networks Windows Domain and Workgroup Client Configuration In Windows 2K, Domain and Workgroup settings can be configured under My Computer (Rt. Click)->Properties->Network ID Tab->Properties