for pay per post experiment

CSMA/CD

There is no central control management when computers transmit on Ethernet.

Exponential Back Off:

Even with random delays, collision may occur especially likely with busy segments. 

Bit Stuffing

Byte stuffing refers stuffing with character  oriented hardware and bit stuffing refers to bit oriented hardware.

 The modified record may be written into an overflow

area, forcing either multiple read operations at query time or reorganizing and rewriting the

previous area.

Columnar database column-based structure

The newer column structure has gained interest as the indexing and data transfer

problems associated with record structures have proved problematic for analytics

applications. 

small that the entire set of all data values can frequently stay in memory, affecting I/O

bandwidth only when the system is started.

Relational Database (RDBMS)

There are many commercial variations of record-based databases available.

In VBS, each unique data value is stored only once,

making the database extremely compact and fast.

Conclusion

Despite their limitations, rrecord-based relational databases have long been the prevailing

data structure used in data warehouse systems

that are impractical or impossible with other data structures

56k Modems

Uploading

Downloading

Result

Mode

Multimode     Step-index          Graded-index

Single Mode

LECTURE # 4

Performance of Medium:

  Throughput

   Propagation Speed

   Propagation Time

Types of Digital Services

LECTURE #  21

Internet

Press	To
CTRL+C	Copy.
CTRL+X	Cut.
CTRL+V	Paste.
CTRL+Z	Undo.
DELETE	Delete.

SHIFT when you insert a CD into the CD-ROM drive

Prevent the CD from automatically playing.

F1	Display Help.
F4	Display the items in the active list.
BACKSPACE	Open a folder one level up if a folder is selected in the Save As or Open dialog box.

Search for computers.

Accessibility keyboard shortcuts

RIGHT ARROWDisplay current selection if it's collapsed, or select first subfolder

A computer running Windows XP Professional ("remote" computer) with a connection to a Local Area Network or the Internet.

Ensure that Remote Desktop Web Connection is installed and running on the Web server. For more information, see Setting up Remote Desktop Web Connection.

You can now make free calls from your pc to any mobile in the world

very Excelent Result of AVG 9.0 proofed.

When you publish to your blog, your blog goes into a huge database, listing blogs just updated. You can see a replica of this database in the Recently Updated Blogs list

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AVG virus database

When you publish to your blog, your blog goes into a huge database, listing blogs just updated.