principles of network and system administration phần 5 docx

... addresses /27 1/8th 32 /26 1/4th 64 /25 1 /2 128 /24 1 25 6 /23 2 5 12 /22 4 1, 024 /21 8 2, 048 /20 16 4,096 /19 32 8,1 92 /18 64 16,384 /17 128 32, 768 /16 25 6 = 1 class B 65,536 /15 5 12 131,0 72 /14 1, 024 26 2,144 /13 ... like this: 128 .39.0.0 (25 5 .25 5 .25 2.0) 128 .39.1.0 128 .39 .2. 0 128 .39.3.0 128 .39.4.0 (25 5 .25 5 .25 4.0) 128 .39.5.0 128 .39.6.0...

Ngày tải lên: 13/08/2014, 22:21

... 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. ... database 10771 files and directories currently installed.) Unpacking bison (from /bison_1%3a1 .35 -3_ i386.deb) Setting up bison (1 .35 -3) 122 CHAPTER 4. HOST MANAGE...

Ngày tải lên: 13/08/2014, 22:21

... independently by Burgess in [43 , 44 ], in the wider context of general system maintenance. References [44 , 42 ] also discuss how computer systems can be thought of as statistical mechanical systems, drawing ... CHAPTER 6. MODELS OF NETWORK AND SYSTEM ADMINISTRATION 6 .4. 4 Jini and UPnP: management-free networks Jini is a Java derivative technology that is aimed at self-...

Ngày tải lên: 13/08/2014, 22:21

... attempts to keep track of changes in individual systems using a method of revision control. A typical Unix system might consist of thousands of files comprising software and data. All of the files (except ... digested, understood and, not least, obeyed by users and system staff alike. ã Determine the system policy. This is the prerequisite for all system mainte- nance. Kn...

Ngày tải lên: 13/08/2014, 22:21

... 302 13 .4 .1 RegulationintheUS 302 13 .4.2 CurrentTrends 305 13 .5FurtherReading 306 14 Auctions 309 14 .1SingleItemAuctions 311 14 .1. 1 Take-it-or-leave-itPricing 311 14 .1. 2 TypesofAuction 312 14 .1. 3 ... TypesofAuction 312 14 .1. 3 RevenueEquivalence 313 14 .1. 4 OptimalAuctions 315 14 .1. 5 RiskAversion 317 14 .1. 6 Collusion 318 14 .1. 7 TheWinner’sCurse 318 14 .1. 8 Ot...

Ngày tải lên: 14/08/2014, 12:20

... sites of Nortel Networks (20 02a) and (20 02b). The concepts of network service layering and quality of service are covered in the classic networking textbooks of Walrand (1998), Walrand and Varaiya ... value of a network increases as about the square of the number of users’, and ‘the number of transistors in computer chips doubles every eighteen months’. The web p...

Ngày tải lên: 14/08/2014, 12:20

... (d) (b) R 1 R 2 R 3 R 4 leased lines R 3 R 2 R 1 R 4 ATM network virtual path R 3 R 2 R 1 R 4 datagram network R 3 R 2 R 1 R 4 Figure 3. 10 Some possible virtual private networks. In (a) we show the logical network ... minimum of linear functions of x,the right-hand side of (4.11) defines a concave function of x and so each A t is the complement of a convex set (refe...

Ngày tải lên: 14/08/2014, 12:20

... of x satisfying the following two constraints: k X jD1 x j ² j Ä C (4. 15) k X jD1 x j  ² j C ² 2 j  2B Á Ä B C C (4. 16) Constraints (4. 15) and (4. 16) correspond to .s; t/ values of .0; 1/ and ... capacity of the links become larger. This assumption is realistic in the context of the expanding capacity of today’s broadband networks. Using this result we can describe the tec...

Ngày tải lên: 14/08/2014, 12:20

... are economies of scale in demand. The monopolist will tend to grow, and will take advantages of economies of scope to offer more and more services. OLIGOPOLY 159 In the case of n competing ... than marginal cost. NETWORK EXTERNALITIES 139 0 50 0 1000 150 0 2000 250 0 0 100 p = MC n 1 n 2 AB p(n) n price Figure 5. 8 An example of a demand curve for N D 100 when there are...

Ngày tải lên: 14/08/2014, 12:20

Ngày tải lên: 14/08/2014, 12:20

... the NETWORK and USER r problems in (10.5) and (10 .7) . We stress again that the advantage of approaching the solution of SYSTEM by way of the NETWORK and USER r problems is that the network and ... managing network resources. 10.1 Notions of fairness In this and the following two sections, we adopt the following model of a network of elastic users. We let L...

Ngày tải lên: 14/08/2014, 12:20

... (19 68) . The impact of random effects and of time lags on stability together with arrivals and departures of users are further treated in Johari and Tan (2001). Other interesting formulations of ... routing of the packets inside the network, addressing, congestion control, and quality of service issues, such as the reliability and variability of transmission. These a...

Ngày tải lên: 14/08/2014, 12:20

... book of Kahn ( 199 8). A theoretical treatment of regulation issues and policies can be found in Wolfstetter ( 199 9). Many regulators have excellent web sites. We recommend the sites of the UK and ... auctions are of great practical importance, and have been applied to selling units of bandwidth in computer networks and satellite links, MWs of electric power, capacity of...

Ngày tải lên: 14/08/2014, 12:20

... Application of the many sources asymptotic and effective bandwidths to traffic engineering. Telecommunication Systems 12, 167–191. Courcoubetis, C. and J. Walrand (1991) Note on the effective bandwidth of ... characterisation and effective bandwidths for broadband network traces. Gibbens, R. and P. Hunt (1991) Effective bandwidths for the multi-type UAS channel. Queueing Systems...

Ngày tải lên: 14/08/2014, 12:20