four example of network operating system
principles of network and system administration
... administration, the word system is used to refer both to the operating system of a computer and often, collectively the set of all computers that cooperate in a network. If we look at computer systems analytically, ... security. 2.3.3 Securable operating systems To distinguish them from insecure operating systems we shall refer to operating systems like Unix and NT as securable operating systems. This should not ... basic standards in order to work systematically. The type of hardware limits the kind of software that can run on it. Software requires hardware, a basic operating system infras- tructure and a...
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Principles of Network and System Administration 2nd phần 2 doc
... There are two types of Windows system with separate software licenses: workstations and servers.Windowscanworkasastand-alonesystemorasaworkstation, integrated into a system of network services. ... mach. Knowing the operating system of a host is not sufficient. We also need to know what kind of resources the host has to offer the network, so that we can later plan 60 CHAPTER 2. SYSTEM COMPONENTS Net ... (255.255.255.0) 72 CHAPTER 2. SYSTEM COMPONENTS 3. What effect does temperature have on computer systems? 4. What is the function of an operating system? (Hint: how do you define an operating system? ) 5. Why...
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Principles of Network and System Administration 2nd phần 3 pptx
... to the system before change strikes. A plan is needed for testing new versions of software. Package systems for software make this process easier, since one can allow several versions of software to ... which replace many of the older Unix equivalents, like ls and cp. GNU software has its own system of installation and set of standards. GNU will also eventually become an operating system in its own right. ... be regarded as one of the unsolved problems of system administration. Part of the problem is that the requirements of each organization are rather different. Many Unix-like systems provide shell...
Ngày tải lên: 13/08/2014, 22:21
Principles of Network and System Administration 2nd phần 4 potx
... competing system to SNMP called COPS-PR [101]. 6.3. NETWORK ADMINISTRATION MODELS 207 6.3 Network administration models The management of clusters of systems leads to the concept of logistic networks. Here ... territory of more intelligent agent systems like cfengine and PIKT. Despite the shortcomings of SNMP for host operations, many operating systems do define their own MIBs for the collection of system ... build software systems which apply certain principles to the problem of management. Network management has, to some extent, been likened to the process of software develop- ment in the System...
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Principles of Network and System Administration 2nd phần 5 pot
... freak coincidence of human social structures; it is a property of a kind of network known as a small-world network [319]. Definition 6 (Small-world network) . There is a class of highly clustered ... services, like web mail, often consist of a farm of PCs running FreeBSD Unix (this has retained the record for the most efficient network handling of all the operating systems to date), backed ... study of networks reveals that networks with the small-world property also exhibit so-called ‘scale-free’ behavior, over a wide range of scales. In other words, over a wide range of scales, the networks...
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Principles of Network and System Administration 2nd phần 6 pot
... 303]. More often than not, performance tuning is related to the availability or sharing of system resources. This requires tuning the system kernel. The most configurable piece of software on the system ... plan for loss of some of the hosts. EXERCISES 327 8. What is meant by the environment of a system? 9. How does one find the boundary between system and environment? 10. What kind of faults can ... services Network services are the crux of network cooperation (see section 3.5). They distinguish a cooperative network from a loose association of hosts. A community is bound together by a web of...
Ngày tải lên: 13/08/2014, 22:21
Principles of Network and System Administration 2nd phần 7 doc
... Samba Samba is a free software solution to the problem of making Unix filesystems available to Windows operating systems. Windows NT uses a system of network file sharing based on their own SMB (Server ... quantitative terms. The details of this are beyond the scope of the present book. 3 Example 14. The simplest kind of SLA is that offered by Internet Service Providers, using ADSL lines, who might offer a home user ... or /etc/filesystems. On Solaris systems it is called /etc/vfstab. The advantage of writing the disks in the filesystem table is that the mount commands will not be lost when we reboot our system. The filesystems...
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Principles of Network and System Administration 2nd phần 8 pps
... the case of an accident. In the unlikely event of every host being destroyed simultaneously, downloading the software again from the network is the least of your worries! Reconstructing a system ... nature of possible threats to the security of a human–computer system. 444 CHAPTER 11. PRINCIPLES OF SECURITY Authentication is usually performed at the start of a session between client and system. ... In earlier times, it was normal to backup the operating system partitions of hosts to tape. Today that practice is largely unnecessary: the operating system is readily available on some straightforward...
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Principles of Network and System Administration 2nd phần 9 potx
... impressions include the amount of dependency of a software component on other software systems, hosts or processes; also the dependency of a software system on the presence of a human being. In ref. ... of the environment around it. The system is open because input changes the state of the system s internal variables and output changes the state of the environment. Every piece of computer software ... of a system, within a fixed number of states. It is one of many possibilities 536 CHAPTER 13. ANALYTICAL SYSTEM ADMINISTRATION f ( t ) - signal Fourier transform FrequencyTime Figure 13.16: Fourier...
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Principles of Network and System Administration 2nd phần 10 pps
... burned into the network interface. ã Memory image: A copy of some software in the actual RAM of the system. Often used to refer to the resident size of a program, or the amount of memory actually ... memory image of a Perl program is often smaller than that of a shell script when all of the sub-programs of a shell script are taken into account. We have barely scratched the surface of Perl here. ... Self-monitoring and self-adapting operating systems. Proceedings of the Sixth Workshop on Hot Topics in Operating Systems, 1997. Appendix D Glossary ã ACL: Access control list, a list of access rights to...
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principles of network and system administration phần 1 docx
... PRICING AND COMMUNICATIONS NETWORKS a network increases as the square of the number of users. It relates to the idea of network externality and the fact that a larger network has a competitive ... the learning curve for this type of software is very steep. Similarly, Microsoft Word commands a good price because of a network externality effect: the number of people who can exchange documents ... indeed, as the example of Microsoft Word shows, there may be added value if many computers install the same software. 1.1.4 Special Features of the Communications Market One special feature of the market...
Ngày tải lên: 14/08/2014, 12:20
principles of network and system administration phần 2 pot
... manner, without preallocating any slots. Examples of synchronous networks are ISDN (Integrated Services Digital Network) , SDH and SONET. Examples of asynchronous networks are the Internet, Frame Relay ... concrete examples of Service Level Agreements for ATM and Frame Relay can be seen at the web sites of Nortel Networks (2002a) and (2002b). The concepts of network service layering and quality of service ... multiples of 155.52 Mbps. An important quality of service provided by SONET and SDH networks is the ability to recover in the event of fibre disruption or node failure. The nodes of SONET and SDH networks...
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principles of network and system administration phần 3 potx
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principles of network and system administration phần 5 docx
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principles of network and system administration phần 6 potx
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