data communications and networking 5th edition

Data Communications and networking overview

Data communications and Networking

... discussed: data communications, networking, protocols and standards, and networking models.Networks exist so that data may be sent from one place toanother-thebasic con-ceptof data communications. Tofully ... Chapter 1 and Chapter2.Chapter 1InChapter1,we introduce the conceptsof data communications and networking. Wedis-cuss data communications components, data representation, and data flow.Wethen ... hardware and software com-ponentsof data communications and networking. Although the term "network model"suggests a relationship to networking, the model also encompasses data communications. ChaptersThis...

1,171
826
1

business data communications and networking a research perspective

Danh mục: Cao đẳng - Đại học

... ECL SCIV dataset, consisting of over 1,110 skin-color images of more than 1,110 people, which resulted from vi Research in the area of data communications and networking is well and alive ... International Journal of Business Data Communications and Networking (http://www.idea-group.com/ijbdcn). The chapters are divided in four themes: (1) network design and application issues, (2) mobility, ... interesting research activities taking place in the eld of business data communications and networking. The rst section, Network Design and Application Issues, starts with Chapter I, “Design of High...

Data Access and Networking

Danh mục: Kỹ thuật lập trình

... ■ DATA ACCESS AND NETWORKING 147 < ;data: DataGrid x:Name="grdData" Margin="15" AutoGenerateColumns="False"> < ;data: DataGrid.Columns> < ;data: DataGridTemplateColumn ... “Silverlight-enabled WCF Service” and name it StartingHandService.svc, as shown in Figure 6-4. Then click the Add button. CHAPTER 6 ■ DATA ACCESS AND NETWORKING 149 EventHandler<GetHandsCompletedEventArgs>(service_GetHandsCompleted); ... public static List<StartingHands> GetHands() { List<StartingHands> hands = new List<StartingHands>(); hands.Add( new StartingHands() { Nickname = "Big...

Cryptography and network security principles and practice, 5th edition

Danh mục: An ninh - Bảo mật

Tài liệu Communications and Networking doc

Danh mục: Hệ điều hành

... channels, and can be encountered in most of multicarrier systems. In summary, this book covers a wide range of interesting topics of communications and networking. The introductions, data, and ... sub-carriers and can be considered to be guard bands that avoid interference from other applications in adjacent bands and are not employed to deliver any information. It should be noted that xn and ... references in this book would help the readers know more about communications and networking and help them explore this exciting and fact-evolving ﬁ eld. EditorJun PengUniversity of Texas...

distributed systems concepts and design 5th edition

Danh mục: Quản trị Web

... repeaters and network interfaces; and software components,including protocol stacks, communication handlers and drivers. The resulting functionality and performance available to distributed system and ... devices Database serverApplicationlogicDatabasemanagerTier 1 Tier 2 Tier 3a) data manipulationApplication and data managementUser view,controls and data manipulation54 CHAPTER 2 SYSTEM ... including the encoding and decoding of parameters and results, the passing of messages and the preserving of the required semantics for the procedure call. This approach directly and elegantly supports...

1,067
2,221
9

DNS and BIND 5th Edition_3 doc

Danh mục: Hệ điều hành

... your data the first time and then maintain your DNS data manually. Or, you can use h2n over and over again. As youhave seen, the format of the host table is much simpler to understand and to ... cache the data. After thetime to live expires, the name server must discard the cached data and get new data from the authoritativename servers. This also applies to negatively cached data; a ... primary master name server. Let's go back and revisit the DNS database files; there are shortcuts we didn't use. Unless you see and understand the long formfirst, though, the short form...

DNS and BIND 5th Edition_4 doc

Danh mục: Hệ điều hành

... standard. The code is based onDNS 4.9.3, so it understands the domain, search, nameserver, options, and sortlist directives; AIX supportsup to three nameserver directives. AIX versions 4 and ... for the hosts database.6.4.3 HP's HP−UXHP's resolver implementation is basically straight DNS; the HP−UX 8.0 and 9.0 resolvers are based onDNS 4.8.3, and support the standard domain, ... name server pulling the zone data starts a child process, and the name server providing the zone data may start a child process. We'll digress a little here and explainwhy child processes...

DNS and BIND 5th Edition_5 docx

Danh mục: Hệ điều hành

... and one for TCP), and one for opening zone data files.If that's more than the limit your operating system places on processes, BIND won't be able to get any morefile descriptors and ... for data in the movie.edu and two in−addr.arpa zones. Why? Because most of the hosts querying the name server areon the two networks it's connected to, 192.249.249 and 192.253.253. And ... message about the zone data: Jan 10 20:48:38 terminator named[3221]: terminator2 has CNAME and other data (invalid)This message means that there's a problem with your zone data. For example,...

DNS and BIND 5th Edition_6 ppt

Danh mục: Hệ điều hành

... command−line program nsupdate, which ispart of the standard BIND distribution. nsupdate reads one−line commands that it then translates into anupdate message. Commands can be specified on standard ... operateefficiently, and it may even panic or exit. Unless your name server handles an extremely large amount of data, you won't run into this limit. But if you do, BIND 4.9 and 8 have configuration ... host or network cannot handle ten active zone transfers, you should decrease this number. If you run aserver supporting hundreds or thousands of zones, and your host and network can support...

DNS and BIND 5th Edition_7 pdf

Danh mục: Hệ điều hành

... already in its database of authoritative data and cache data, itanswers with this information; this part of the operation hasn't changed. However, if the information is not inits database, ... question in a DNS packet; it includes the name and the requested data type and class. There is never more than one question in a DNS packet. The capability of handling more thanone question in a DNS ... The data are divided into thefollowing basic areas: starting up, updating the database, processing queries, and maintaining zones. Wewon't cover updating the name server's internal database...

53
1,423
0

DNS and BIND 5th Edition_8 doc

Danh mục: Hệ điều hành

... server's internal database − including cached information − can also helpyou track down problems. The INT signal causes named to dump its authoritative data, cache data, and hints data to named_dump.db ... it last loaded the data, and read the file. About thebest you can do is to use nslookup to compare the data returned by the primary and by a slave. If theyreturn different data, you probably ... process.The status of 1 indicates that the zone data was successfully transferred. The old zone data is purged (time00:14:02.094), and the new data is loaded.The next maintenance (see time 00:14:30.058)...

DNS and BIND 5th Edition_9 doc

Danh mục: Hệ điều hành

... and quit */ } /* * Initialize a handle to this response. The handle will * be used later to extract information from the response. */ if (ns_initparse(response.buf, responseLen, &handle) ... bufferhandleA pointer to a data structure filled in by ns_init_parsens_init_parse returns zero on success and −1 when it fails to parse the response buffer.const u_char *ns_msg_base(ns_msg handle)const ... *ns_msg_end(ns_msg handle)int ns_msg_size(ns_msg handle)These routines return a pointer to the start of the response, a pointer to the end of the response, and the size ofthe response. They are returning data...

DNS and BIND 5th Edition_10 potx

Danh mục: Hệ điều hành

... [class] type RDATA[class] [TTL] type RDATAThe RR begins with optional TTL and class fields, followed by a type and RDATA field appropriate to thetype and class. Class and type use the standard mnemonics; ... would expect from Microsoft, and provides a handy hook into WINS: you can configure the server to query a WINS server for address data if itdoesn't find the data in a DNS zone.This is done ... InformationHINFO stands for Host INFOrmation. The data are a pair of strings identifying the host's hardware type and operating system. The strings should come from the MACHINE NAMES and OPERATING...