working principles of network operating system ppt
Principles of Network and System Administration 2nd phần 3 pptx
Ngày tải lên :
13/08/2014, 22:21
... 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. ... 4
Not all systems distinguish between target and device. On many systems you will
find only t or d but not both.
4.6 Installation of the operating system
The installation process is one of the most...
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principles of network and system administration
Ngày tải lên :
03/06/2014, 01:29
... 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 ... case.
1.9 The meta principles of system administration
Many of the principles in this book derive from a single overriding issue: they
address the predictability of a system. The term system clearly...
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Principles of Network and System Administration 2nd phần 2 doc
Ngày tải lên :
13/08/2014, 22:21
... 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 4 potx
Ngày tải lên :
13/08/2014, 22:21
... 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 ... 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...
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Principles of Network and System Administration 2nd phần 5 pot
Ngày tải lên :
13/08/2014, 22:21
... 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
Ngày tải lên :
13/08/2014, 22:21
... 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...
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Principles of Network and System Administration 2nd phần 7 doc
Ngày tải lên :
13/08/2014, 22:21
... 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 ... Plan for mapping quality of experience onto physical measurables.
3
For a discussion of this point, see the follow-up book by the author: Scientific Principles of Network
and System Administration, ... 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
Ngày tải lên :
13/08/2014, 22:21
... 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. ... examines filesystems.
4
As the reviewer of this book put it: ‘They’re done. Stick a fork in them.’
446 CHAPTER 11. PRINCIPLES OF SECURITY
11.8.2 Denial of service (DoS) attacks
Another type of attack ... 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...
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Principles of Network and System Administration 2nd phần 9 potx
Ngày tải lên :
13/08/2014, 22:21
... 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 ... basis of programming
algorithms in computer software and the same thing applies to conglomerations of
different software systems. The same principle applies to the storage of any kind
of information....
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Principles of Network and System Administration 2nd phần 10 pps
Ngày tải lên :
13/08/2014, 22:21
... burned into the network interface.
• 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 ... Homogeneous: Uniform. In a network context, a homogeneous network is one
in which all of the hosts have the same operating system.
• IETF: Internet Engineering Task Force. A working group that defines ... 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....
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