Thursday, January 19, 2012

hello guys...just wanna share some basic networking terms and facts with you..

A guy asked me the difference between baseband and broadband transmission and i couldn't find the easiest answer than this one..


In Baseband, data is sent as digital signals through the media as a single channel that uses the entire bandwidth of the media. Baseband communication is bi-directional, which means that the same channel can be used to send and receive signals. In Baseband no frequency-division multiplexing is not possible. (Multiplexing (short muxing) is a process where multiple analog message signals or digital data streams are combined into one signal over a shared medium.)

In Broadband sends information in the form of an analog signal. Each transmission is assigned to a portion of the bandwidth, hence multiple transmissions are possible at the same time. Broadband communication is unidirectional, so in order to send and receive, two pathways are needed. This can be accomplished either by assigning a frequency for sending and assigning a frequency for receiving along the same cable or by using two cables, one for sending and one for receiving. In broadband frequency-division multiplexing is possible.

Another Confusion among freshers in this field i see is what the hell is this 10base2,10base5,etc..so for them here is the simplest explanation of it..


10Base2—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that uses baseband signaling, with a contiguous cable segment length of 100 meters and a maximum of 2 segments.

10Base5—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that uses baseband signaling, with 5 continuous segments not exceeding 100 meters per segment.

10BaseT—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that uses baseband signaling and twisted pair cabling.  


Wednesday, November 16, 2011

more securtiy links

all about what and how of cryptography -:

http://www.garykessler.net/library/crypto.html

the following article effectively explains about the VTP puning..

http://www.firewall.cx/networking-topics/vlan-networks/virtual-trunk-protocol/225-vtp-pruning.html
port mirroring is all about this-:

http://www.miarec.com/faq/what-is-port-mirroring

have a look at the power of microsoft essentials..
do look at the previous parts..i'm just loving it..

http://www.windowsecurity.com/articles/Hunt-Down-Kill-Malware-Sysinternals-Tools-Part3.html
it's all about Linux and open source..

http://www.linuxhomenetworking.com/

wireless security in a simple and easy way---

http://www.networkworld.com/slideshows/2011/110711-wifi-security.html#slide1



Tuesday, October 25, 2011

my favourite chrome apps

hey guyz..

today i want to share my favourite apps from chrome web store.


Angry birds-it tops my list purely an addictive cool game..

20thingsilearned-:a basic guide to learned all about your browser..a worth reading book in a simple and interactive way..

readlaterfast-:it alllows me to save a webpage by just a right click for later reading..a helpful one for the needy one

entanglement -: a game to wreck your nerves for higher scores..

quicknote -:a notepad for to do things..


Tuesday, September 20, 2011

Got my Pen drive back from Hell...

today i'm much enthusisatic beacause i give a second  life to my pen drive which was showing the file system of my pendrive as RAW format...actually i practised the raid and lvm in linux on my 8gb pen drive..dat's why the file system of my pen drive gets corrupt..but thanks to hp's usb disk storage format utility i have regained the fat32 filesystem on my pen drive...