Shulou(Shulou.com)06/01 Report--

Last year, I got a Seagate NAS,Central series product, 3T storage space. After I bought it, I didn't have time to study it, so I plugged it in and used it. The speed of the intranet has been maintained around 10M-15M. This year, 618 has changed to a gigabit router, and the speed has instantly increased to 50M-70M. All the cables use Category 5, and if they are replaced by Category 5 or Category 6, the performance can certainly be improved. When I found a buddy's professional answer about gigabit network cable on the Internet, I couldn't help but stick it down and share it with you: thank you, brother.

Original post address: http://we.poppur.com/thread-1098485-1-1.html

The transmission frequency standard for Category 5 lines is 100MHz Super 5, generally 125MHz Category 6 Standard Specification is 250MHz enhanced Category 6 Standard is 500MHz

But in fact, the transmission frequency standards of the products of many well-known manufacturers are higher than the prescribed ones.

Standard 1000BASE-T of kilometer line

Based on the 802.3ad standard transmission media cat5 4 pair line simultaneous bi-directional transmission cat5e can also be compatible with Category 6 lines

Ordinary Category 6 wires generally refer to twisted pairs with transmission frequency bit 250mhz or so.

The corresponding standard in practical application is 1000BASE-TX, but there are not many devices that support this standard.

It differs from the standard 1000BASE-T of 1000 m lines in that "4 pairs of lines are used to transmit but 2 pairs are used separately to receive 2 pairs of transmissions."

Reduced line usage (using only 2 pairs of lines to receive 2 pairs of line transmissions) reduces crosstalk

Therefore, it is required to have a stronger transmission frequency than Category 5 lines, only Category 6 lines can be used as transmission media.

Cat6a enhanced Category 6 standard 10GBase-T 10 Gigabit Ethernet corresponding protocol is 820.3an also uses 4 pairs of lines for two-way transmission

The specified transmission frequency is 500MHz or above.

There are two kinds of shielding lines: stp and ftp, which are expensive and difficult to install.

It is effective only if there are special connectors and grounding at both ends of the wire and the whole network system is shielded.

So it is usually only used in places with high confidentiality requirements.

When it is generally used, what standard protocols are supported on each port of its own device to decide which transmission medium to use, except for yy of course

If the building owner is directly connected to the kilometer network card, the standard is that 1000base-t uses four pairs of lines to transmit at the same time. Any kind of media can be most common, of course, using cat5e.

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