network operating systems ppt

... 1 Unit 6 Operating systems Task 1 Operating systems: hidden software Read the text to find the answers to these questions 1. What difference is there between applications software and operating ... interface – an operating system. An operating system is a set of programs that lies between applications software and the computer hardware. The most important program in the operating system, ... applications program, are actually carried out by the operating system. Task 2 Complete the gaps in this summary of the text on operating systems using these linking words and phrases although...

Ngày tải lên: 21/12/2013, 20:15

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Ngày tải lên: 28/06/2014, 02:20

Ngày tải lên: 28/06/2014, 02:20

... embedded systems, however, the cost increase would be enormous. So the performance of the operating system has significant impact on the costs of embedded systems, especially for single-chip systems. For ... disadvantages of put semaphores apply here as well. Realtime Operating Systems Concepts and Implementation of Microkernels for Embedded Systems Dr. Jürgen Sauermann, Melanie Thelen 2 Concepts 2.1 ... perceived by the user: today’s operating systems consume even more memory and CPU performance than technological development can provide. So the more advanced the operating system, the slower the...

Ngày tải lên: 23/10/2013, 22:15

Ngày tải lên: 26/11/2013, 20:49

... sublayer interfaces with the network layer (OSI model Layer 3). Network Layer Addresses Network layer addresses identify a device at the OSI network layer (Layer 3). Network addresses exist within ... and expands to the network endpoints. This topology allows a network to expand dynamically with only one active data path between any two network endpoints. A tree topology network is one that ... 1163 Current Network Topology and Characterization 1164 Recommendations 1173 Network Health 1173 Network Provisioning 1195 Subnet Masks 1197 Cisco Press has numerous books on networking....

Ngày tải lên: 10/12/2013, 14:16

... Remote Campus Building CORE NETWORK Features • DS1, DS3 and STS-1 network interfaces • Integrated intelligent network management Benefits • Fits anywhere in the network DS1s need to be distributed • ... Integrated intelligent network management • Variety of network interfaces: DS1, DS3 and STS-1 • High density platform - distributes 28 DS1 circuits per chassis • Uniquely designed for network growth Soneplex ... seven remote Soneplex Broadband systems, supporting up to 196 T1 circuits • Uses embedded DS3 communications channel instead of usable communica- tions bandwidth or an overlay network • TBOS and TL1 support...

Ngày tải lên: 10/12/2013, 16:15

... of computers are involved. Networks that run Windows 95/98 as their network operating system or networks using Windows NT in a workgroup are considered peer-to- peer networks. Figure 1.3 shows ... essential networking technologies. Because the Network+ exam covers network fundamentals and is vendor neutral, it may be a good replacement for the Microsoft or the Novell exam. How to Become Network+ ... planet. A WAN is any network that crosses metropoli- tan, regional, or national boundaries. Most networking professionals define a WAN as any network that uses routers and public network links. The...

Ngày tải lên: 10/12/2013, 16:15

... /etc/exports describes one file system per line. The format is: file system options systems systems is a list of systems allowed to mount the file system. The only required field is the name of the ... Internet, you should at least limit the number of systems that can mount your file systems. By default anysystem on the Net can mount your file systems. There are a number of options. Here are the ... important; don’tchange it. Proxyweb servers Apache is capable of operating as a proxy server: it can accept requests for web pages of other systems. This can be an alternative toageneral IP aliasing...

Ngày tải lên: 11/12/2013, 00:15

... host or a network is unreachable. Although it may be too long or volatile on many systems to be very helpful, the routing table is sometimes useful in getting a quick idea of what networks are ... may be quite ignorant of his network. With the rapid growth of the Internet, turnkey systems seem to have grown in popularity. A fundamental assumption of these systems is that they are managed ... control, if any, over what is connected to the network. This isn't necessarily bad—it's the way universities work. But rogue systems on your network can have annoying consequences. In...

Ngày tải lên: 11/12/2013, 01:15

... Single-mode riser and plenum cables are available in yellow. † NR = Not Rated FiberOptic CABLING SYSTEMS ...

Ngày tải lên: 11/12/2013, 13:15

Ngày tải lên: 12/12/2013, 23:15

... Securing the Network 23 Today, corporate networks require access to the Internet and other public networks. Most of these networks have several access points to public and other private networks, ... reachability in the network. Two Links Connected to the Same Networking Device 22 Chapter 1: Building a Simple Network Securing the Network Security is a fundamental component of every network design. ... provide network attachment to the end systems and intelligent switching of the data within the local network. ■ Routers: Routers interconnect networks and choose the best paths between networks. Interpreting...

Ngày tải lên: 13/12/2013, 05:15

... xxiii Chapter 1 Building a Simple Network 3 Chapter Objectives 3 Exploring the Functions of Networking 3 What Is a Network? 4 Common Physical Components of a Network 5 Interpreting a Network Diagram 6 Resource-Sharing ... LAN Exploring the Functions of Networking To understand how networks function, you need to become familiar with the basic elements of a network. This chapter explains networks by introducing fundamental ... build a computer network is defining what a network is and understanding how it is used to help a business meet its objectives. A network is a connected collection of devices and end systems, such...

Ngày tải lên: 13/12/2013, 05:15