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Dan Dan's Questions & Answers

in Agony Aunt, Computers & Technology& Movies

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Total Points: 7597

Answers Given: 2954

Questions Asked: 274

Best Answers: 84

What is meant by Bysinc?

Asked by joydeep bhat in Computers & Technology at 1:31 AM on November 09, 2008

Dan Dan's Answer

Binary Synchronous Communication (BSC or Bisync) is an IBM link protocol, announced in 1967 after the introduction of System/360. It replaced the synchronous-transmit-receive (STR) protocol used with second generation computers. The intent was that common link management rules could be used with three different alphabets for encoding messages. Six-bit Transcode looked backwards to older systems; USASCII with 128 characters and EBCDIC with 256 characters looked forward. Transcode disappeared very quickly but the EBCDIC dialect of Bisync still has limited use in the early years of the 21 century.

Answered at 2:02 AM on November 09, 2008

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Explain the term LATA or Local Access and Transport Area.

Asked by joydeep bhat in Computers & Technology at 1:44 AM on November 09, 2008

Dan Dan's Answer

A geographic area served by a local telephone company. Originally, LATAs had the same boundaries as area codes, and were used to help differentiate between local exchange carriers and interexchange carriers for rate setting and for the purposes of defining which companies could provide which services under the terms of the 1983 breakup of AT&T. However, the rapid proliferation of phone numbers means that many LATAs are now split into multiple area codes

Answered at 1:58 AM on November 09, 2008

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What is a servlet?

Asked by Preeti Singh in Computers & Technology at 3:20 PM on November 08, 2008

Dan Dan's Answer

A servlet is a Java programming language class that is used to extend the capabilities of servers that host applications access via a request-response programming model. Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by web servers. For such applications, Java Servlet technology defines HTTP-specific servlet classes.

Answered at 4:10 PM on November 08, 2008

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Can you please explain the term 'Velocity of Propagation' to me.

Asked by joydeep bhat in Computers & Technology at 1:49 AM on November 09, 2008

Dan Dan's Answer

Velocity of Propagation (VoP) or velocity factor (VF) is a parameter that characterizes the speed at which an electrical signal (e.g. radio) passes through a medium. Expressed as a number between 0 and 1 (or a percentage), it is the ratio of a signal's transmission speed to the speed of light in vacuum. Thus, transmission in a vacuum would have a VoP of 1 (100%). VoP equals the reciprocal of the square root of the dielectric constant of the material through which the signal passes.

Answered at 1:56 AM on November 09, 2008

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What is 802.11n?

Asked by aryan prasad in Computers & Technology at 3:20 PM on November 08, 2008

Dan Dan's Answer

The 802.11 standard, also known by its trade name, Wi-Fi, has become common in the home and has a significant and growing role in corporate settings. But the existing standard, 802.11g, was ratified in 2003 and is increasingly seen as inadequate as applications become more complex and require more bandwidth.

For instance, streaming video -- whether it's a feature-length movie at home or videoconferencing at work -- is a dicey proposition with 802.11g. So-called "g" products have a theoretical maximum throughput speed of 54Mbit/sec. but real-world speeds of half that or even slower, which isn't quite enough for video.

Answered at 4:12 PM on November 08, 2008

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When is a host refered to as Multihomed?

Asked by joydeep bhat in Computers & Technology at 1:46 AM on November 09, 2008

Dan Dan's Answer

Multihoming techniques are under serious consideration as the transition to the new IPv6 protocol is underway, specifically with the objective of imparting the desired level of resilience against malfunction of the links, hardware, and protocols within the system. The following additional advantages may also be derived: redundancy, load sharing, traffic engineering, policy constraints, transport-layer survivability, scalability, DNS compatibility, packet filtering capability and legacy compatibility.

Requirements for Multihoming
While the basic premise of using multihoming is to provide a solution to eliminate scope for the single point of failure (SPOF) in network connectivity, certain important factors have to be satisfied ensure flawless performance:

Answered at 1:57 AM on November 09, 2008

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What is a print bleed for printing?

Asked by boogie woogi in Computers & Technology at 9:12 PM on November 07, 2008

Dan Dan's Answer

"Bleed" is the term for printing that goes right to the edge of the paper. Printed pieces that have a white border or white around the edges, DO NOT bleed. If you have images or backgrounds that you want to print (bleed) off the edge of the paper, then you must design your job larger than the final CUT SIZE. We create bleeds by actually cutting through the enlarged image/background.

Answered at 9:21 PM on November 07, 2008

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How does a DBMS differ from RDBMS?

Asked by boogie woogi in Computers & Technology at 9:12 PM on November 07, 2008

Dan Dan's Answer

RDBMS implements the relational model
designed by Codd for which he designed 12 rules. These r nicknamed as
" Codd Rules".
Are these rules similar to Normalization rules which we follow ? And
does Referential Integrity has a anything to do with Relational-DB

DBMS is simply database management system

Answered at 9:20 PM on November 07, 2008

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How do I handle FORMs with multiple form elements (e.g. radio buttons) using the same name?

Asked by Preeti Singh in Computers & Technology at 3:54 PM on November 08, 2008

Dan Dan's Answer

An HTML form is a section of a document containing normal content, markup, special elements called controls (checkboxes, radio buttons, menus, etc.), and labels on those controls. Users generally "complete" a form by modifying its controls (entering text, selecting menu items, etc.), before submitting the form to an agent for processing (e.g., to a Web server, to a mail server, etc.)

Here's a simple form that includes labels, radio buttons, and push buttons (reset the form or submit it):
<FORM action="http://somesite.com/prog/ad duser" method="post">
<P>
<LABEL for="firstname">First name: </LABEL>
<INPUT type="text" id="firstname"><BR>
<LABEL for="lastname">Last name: </LABEL>
<INPUT type="text" id="lastname"><BR>
<LABEL for="email">email: </LABEL>
<INPUT type="text" id="email"><BR>
<INPUT type="radio" name="sex" value="Male"> Male<BR>
<INPUT type="radio" name="sex" value="Female"> Female<BR>
<INPUT type="submit" value="Send"> <INPUT type="reset">
</P>
</FORM>

Answered at 4:03 PM on November 08, 2008

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What are Wireless Modems?

Asked by aryan prasad in Computers & Technology at 3:19 PM on November 08, 2008

Dan Dan's Answer

A wireless modem is a modem which connects to a wireless network instead of to the telephone system. When you connect with a wireless modem, you are attached directly to your wireless ISP (Internet Service Provider) and you can then access the Internet.

Wireless modems operate at speeds comparable to dialup modems, not anywhere near the speed of broadband Internet connections.

Answered at 4:10 PM on November 08, 2008

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