Friday, March 4, 2011

Docx to Pdf with Bullzip PDF Printer (Free Download)

Bullzip PDF Printer is a software to convert docx to pdf. Docx is the file extention from office 2007. By using bullzip job easier. Size Bullzip PDF Printer is a small, namely 4.5 MB, so a place that is used in computers is very small. Here are Bullzip PDF Printer Features:
  • Print to PDF from almost any Windows program.
  • Runs on Microsoft Windows 2000/XP/XP x64/2003/2003 x64/Vista/Vista x64/2008/Windows 7.
  • Supports 64-bit operating systems.
  • Direct output to the same file each time or prompt for destination.
  • Control if the printer should ask if you want to see the resulting PDF document.
  • Control output and prompts programmatically.
  • Setup can run unattended.
  • Graphical user interface.
  • Password protect PDF documents.
  • 128/40 bit encryption.
  • Quality settings (screen, printer, ebook, prepress).
  • Set document properties.
  • Watermark text, size, rotation, and transparency.
  • Superimpose/background documents.
  • Appending/prepending documents.
  • User interface control.
  • Command line interface to all settings.
  • COM/ActiveX interface for programmatic control.
  • Support for Citrix MetaFrame
  • Support for Windows Terminal Server
  • Multiple output types supported: BMP, JPEG, PCX, PDF, PNG, and TIFF.

It’s free software. Please download Bullzip PDF Printer: . No need patch, crack, or serial number. Please. Enjoy it.

Thursday, March 3, 2011

OSI Transport Layer (part4)

Managing TCP Session
When services send data using TCP, segments may arrive at their destination out of order. For the original message to be understood by the recipient, the data in these segments is reassembled into the original order. Sequence numbers are assigned in the header of each packet to achieve this goal.
During session setup, an initial sequence number (ISN) is set. This initial sequence number represents the starting value for the bytes for this session that will be transmitted to the receiving application. As data is transmitted during the session, the sequence number is incremented by the number of bytes that have been transmitted. This tracking of data byte enables each segment to be uniquely identified and acknowledged. Missing segments can be identified.

Wednesday, March 2, 2011

OSI Transport Layer (part3)

The TCP Protocols
The key distinction between TCP and UDP is reliability. The reliability of TCP communication is performed using connection-oriented sessions. Before a host using TCP sends data to another host, the Transport layer initiates a process to create a connection with the destination. This connection enables the tracking of a session, or communication stream between the hosts. This process ensures that each host is aware of and prepared for the communication. A complete TCP conversation requires the establishment of a session between the hosts in both directions.
After a session has been established, the destination sends acknowledgements to the source for the segments that it receives. These acknowledgements form the basis of reliability within the TCP session. As the source receives an acknowledgement, it knows that the data has been successfully delivered and can quit tracking that data. If the source does not receive an acknowledgement within a predetermined amount of time, it retransmits that data to the destination.

Tuesday, March 1, 2011

OSI Transport Layer (part2)

Application developers choose the appropriate Transport Layer protocol base on the nature of the application.
The two most common Transport layer protocols of TCP/IP protocol suite are Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). Both protocols manage the communication of multiple applications. The differences between the two are the specific functions that each protocol implements.
User Datagram Protocol (UDP)
UDP is a simple, connectionless protocol, described in RFC 768. It has the advantage of providing for low overhead data delivery. The pieces of communication in UDP are called datagrams. These datagrams are sent as "best effort" by this Transport layer protocol.
Applications that use UDP include: Domain Name System (DNS), Video Streaming, Voice over IP (VoIP), and
Transmission Control Protocol (TCP)
TCP is a connection-oriented protocol, described in RFC 793. TCP incurs additional overhead to gain functions. Additional functions specified by TCP are the same order delivery, reliable delivery, and flow control. Each TCP segment has 20 bytes of overhead in the header encapsulating the Application layer data, whereas each UDP segment only has 8 bytes of overhead. See the figure for a comparison.
Applications that use TCP are: Web Browsers, E-mail, File Transfers.
This is table content of TCP Segment:
Bit (0)
Bit (15) Bit (16)                                       Bit (31)
Source Port (16)
Destination Port
Sequence Number (32)

Acknlowledgement Number (32)

Header Length (4) Reserved (6) Code Bits (6)
Checksum (16)
Option (0 or 32 if any)

Application Layer Data (Size varies)

Monday, February 28, 2011

OSI Transport Layer (part1)

OSI Transport Layer (part1)
This posting, we examine the role of the Transport layer in encapsulating application data for use by the Network layer. Data from each of these applications is packaged, transported, and delivered to the appropriate server daemon or application on the destination device. The processes described in the OSI Transport layer accept data from the Application layer and prepare it for addressing at the Network layer. The Transport layer is responsible for the overall end-to-end transfer of application data. In fine, The Transport Layer prepares application data for transport over the network and processes network data for use by applications.