Reproduced, a deep understanding of the network cable

when I first went to college, I met a headache. The rich two generations have just come to take the laptop, this let us only play the cell phone the cock silk generation envy envy hate. Deadly thing came, night power constantly nets, so lights out after the notebook can still play. Unfortunately, we also have a bedroom. Often after the lights out, the battery must be clean. While the game side of the voice, but also put music, suffering. Although the persuasion has a good change, but not a few days will be restored.

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When I first went to college, I met a headache.

The rich two generations have just come to take the laptop, this let us only play the cell phone the cock silk generation envy envy hate. Deadly thing came, night power constantly nets, so lights out after the notebook can still play. Unfortunately, we also have a bedroom. Often after the lights out, the battery must be clean. While the game side of the voice, but also put music, suffering. Although the persuasion has a good change, but not a few days will be restored.

Poor cock silk initiation malicious idea

In order to urgently change the situation, but do not want to talk with the new students, so decided to use technical solutions.

But there was only one Nokia mobile phone, no equipment everything is empty talk. The only thing that works is to secretly set up a scheduled task in his computer and turn it off automatically at night. But if you find it worse, there is no technical content at all.

Helpless, can only turn the eye to the computer outside, the network. If the Internet is not available, even if the computer can use, do not stay up to play a single game it.

Since the first time he came, he could use the cable jack, presumably I have a signal here. The last session of the affirmation has been passed, always do not go and later also sealed off. While there are days bedroom no one, I put that laptop network cable to my side a try, sure enough, there is a signal! Suddenly came the spirit, feel hopeful!

Perhaps you will say, it is impossible to connect the network cable to Nokia, and then use what spoof software it ~ Of course, it is not possible, then the mobile phone is so advanced.

TV set-top box for me.

In fact, we don't use any software, or even hardware--except for a cable.

To say how to play with the network cable, but also from the previous installation set-top box on the day to talk about.

There was a time when many cities began to pop up digital television. We are no exception to house-to-house set-top boxes, but also free door-mounted. China Digital TV is originally and Netcom is a, DTV is of course a shared netcom broadband.

Because before has opened the Netcom, this time also to set-top box network, I think at least to send a switch to do it. However, the installation of the master came in, neither pulled out the switch, even the hub is not, but a pair of scissors to cut the network cable!

I was stunned, what the hell was that? Although it was good to play on the network link protocol at the time, the physical layer was a little ignorant. The master leisurely said, the network cable as long as four is enough, and some are spare. So from the previous line, removed four to the set-top box.

This big out of the material before, incredibly useless any equipment on the set-top box connected to! So, again began to whimsical ...

This two shares, in the switch to see is not two independent users? If you put them together, will the effect be the same as the first line of two? Can you short-circuit the LAN?

With the excitement of a test, sure enough! really put the whole network of the community to hang up!

For a long time after the recovery, the number has not been dialed. A lot of neighbors have been dialing in on the sniffer. Obviously, just that the two 4-strand line, the external STP package is also forwarded, causing the cell network is isolated outside.

One cable, one VLAN storm

This day, changed the previous view. Originally only a network cable, you can come to a VLAN storm!

Why does a network of two ports in a switch generate a storm? Because the switch forwards packets destined for broadcast addresses to all interfaces. If there are two interface loops, once the broadcast packets appear, they will be continuously circulated to each other, exhausting the entire device bandwidth. Do not underestimate the switch, it is born for the contract design, the storm can be full of each interface, hit the bandwidth of the back-panel traffic. STP protocol is to solve this problem, loop detection.

Despite the knowledge of this new skill, the physical layer of the basics is not useful, it will be forgotten-until the bedroom under the seat to find the signal of the day.

According to memories, the bedroom also played LAN game, obviously this is not an independent network segment, so more confidence full!

Immediately find a network cable, minus the side of the crystal head, scrape off the skin, and then the corresponding four shares 22 stick. Sure enough, the nearby bedroom began to come-no, first silence for a few seconds, followed by the screams, Roar. "Got it!", "who dropped?", what's the situation? ", by, off the net ~ ~ ~" ...

Ran out of the corridor to see, the whole building is riot! Originally, this dormitory building is not zoned VLAN, all the hundreds of bedrooms are connected together!!!

At this time both excited and worried. The excitement is that after the computer can catch thousands of people's traffic. Worry is, now just want to spoof their bedroom, don't want to involve everyone.

In any case, the operation continues. After lights out should rest, broken all also nothing bad.

At this time there is no major obstacle in technology, the implementation of the poor. How to operate calmly and covertly?

In order not to expose the computer is still stuck in a cable so absurd, so as far as possible along the hidden cupboard wiring, from the closet to drag to the bed. The rest of the horizontal part is buried in the gap beside the bed and covered with a mat.

The whole layout not close to look closely, can not find at all ~

The show is starting to unfold

After lights out that night, the owls began to stir again, and I couldn't wait to start experimenting. As with several other students, pretending to play a mobile phone, the actual has begun to quietly wired, quite underground intelligence staff feel.

When the last share was caught, the smooth gameplay immediately appeared to stutter. After all, the whole building is in this LAN, the number of broadcast packets is quite large.

Only listen to the game left the background music, but no sound!

Thinking about 100Mbps of traffic from the hands of the network cable pinched through, as if to see the dense ARP, NetBIOS broadcast flashed in the dark-and the little poor, squeezed out of the game packet.

Reproduced, a deep understanding of the network cable