1. Networking Week #10 OBJECTIVES Chapter #6 Questions Review Chapter #8

2. Installing a NOS

3. Multitasking The ability of an O/S to support numerous processes at one time. Maintains its MEMORY POINTERS ACCESS to I/O data Provides CYCLES of the CPU for computations Uses TIME SLICING –This is when the computing cycles (Machine Cycles) are divided between more than one process

4. Preemptive Multitasking The O/S controls what process gets access to the CPU and for how long. When current TIME SLICE has expired the process is halted & the next process accesses the CPU

5. Cooperative Multitasking The O/S does not have the ability to stop a process. Once a process has the CPU nothing else can access it until all of its computations are complete.

6. What is a NOS? A single entity that can manage both the activities of the local PC & enable comm. Over the network media Connect all PC’s & peripherals into a whole Coordinate & control the functions of PC’c & Peripherals across the net. Support security & privacy for both the network and individual users Control access to resources on a user authentication basis Management of users & groups Logon authentication of each individual user Management, control, & auditing tools to administer the network Fault tolerance to protect the integrity of the network and the data it supports

7. NOS is the CLIENT Why called the CLIENT? –The component of the Networking System that requests resources from a server

8. REDIRECTORS Software component found on both Client & Server Operates at PRESENTATION layer INTERCEPTS ALL REQUESTS FOR RESOURCE EXAMINES IT TO SEE IF IT IS local or network item –REQUESTOR NOVELL calls redirectors REQUESTOR

9. Designators Aids in network resource interaction Keeps track of the drive letters assigned locally or to remote or network shared drives. DRIVE MAPPING –Associates a network drive resource with a locally assigned letter. –Designator substitutes the REAL NETWORK ADDRESS of the resource before letting the request go to the redirector

10. UNC \\servername\sharename a.k.a. –\\machinename\sharename

11. Server Network Software The NOS installed on computers that host resources to be distributed to clients Hands out resources Allows sharing of resources Allows restriction to resources –What users –What type of access –# of simultaneous users Allows (P3) = privacy, protection & production

12. BEFORE you install a NOS Topology Size of network Job Requirements of server Files system to be used ID or naming convention Types of O/S’s found on servers & clients Organization of storage devices

13. Windows NT Server Configured as: –Domain Controller Authenticates users & maintains the security database for a domain –Member Server Hosts a service or resource & does not participate in maintaining the security database

14. Naming conventions Predetermined way to create names on a network (or stand alone system) Descriptive enough so anyone using the network share can tell what they are Must be: –Consistent, –Easy –Simple –Clear Should incorporate: –User Accounts Last Name, First Name, Department –Computers: Location Department Type –Directories –Network Shares –Printers –Servers

15. Storage Device Organization Most Crucial organization decision about storage devices is how to organize the drive containing or hosting the NOS: Three Types of Organization –Multiple-Boot Good for testing & learning Can compromise security –Single-Partition, Single-NOS Single primary partition for NOS MOST secure –Multiple-Partition, Single-NOS Increases the level of drive activity Degrades the life of the drive faster

16. Network Adapter Configuration Configure NIC BEFORE installing NOS Set cable type Set BUS slot number

17. Protocol Selection Key to installation of NOS Has special designations for Subnets, network addresses, frame types etc…

18. Protocol Selection TCP/IP (Requires the following) –IP Address (used to ID each individual PC) –Subnet Mask (Logical division to define small networks within larger networks (subnet) –Default Gateway (IP address of “routable” PC so individual systems can “talk” outside of their “subnet”) –DNS (Domain Name Service = server-based service that resolves host names, such as www.yahoo.com, into IP addresses) –WINS (Windows Internet Naming Service = resolves NetBIOS names into IP address, usually large intranets) –DHCP (Dynamic Host Configuration Protocol = Automatic configuration, single IP address needed)

19. Binding Process of linking network components from various levels of the network architecture to enable communication between those components. Associates upper-layer services and protocols to lower-layer network adapter drivers Depending on what your resources use as a protocol that protocol should be bound first to enhance performance

20. Hardware Compatibility HCL –Hardware Compatibility List Published by NOS vendors Maintains a list of compatible hardware with that NOS Must be compatible to get Tech Support in some cases May not work on network at all

21. Network Applications Easier to administer & manage Brings entire network up-to-date at 1x If network performance is bad application performance will be bad

22. 3 Types of Network Apps. Architecture Centralized –App. Operates exclusively on server File-System Sharing –App resides on each client –All clients share a common database file or storage directory True Client/Server –Some aspects of app. Reside on server and some on client

23. 3 Main types of Network Apps. E-Mail Scheduling/Calendering Groupware

24. Questions