Copper Connectors – CompTIA Network+ N10-007 – 2.1

Copper Connectors – CompTIA Network+ N10-007 – 2.1


If you’re connecting up
a traditional phone line or you’re using a
modem connection over a traditional
phone line, then you’re probably using an
RJ11 connector. This is what we call a six
position, two conductor cable or a 6P2C connector. You can see there are six
different types of positions that can be on these cables. But if you look
into a modem, you’ll see that only two
conductors are in use. If this is an RJ14
cable, that means that it may be using
dual lines and it may fill in two
more of these wires to be a six position,
four conductor cable. If you’re connecting
a telephone or a modem to a traditional public switch
telephone network, a PSTN, or the plain old telephone
system or POTS, then you’re probably very familiar
with the RJ11 connector. We use a modular connector
that’s a little bit larger for Ethernet. It is an RJ45 connector. The RJ stands for
registered jack. This is an eight position,
eight conductor cable, and we do use all eight
of those conductors for our gigabit Ethernet. You can see all eight of
those conductors are in use, and if you’re connecting an
Ethernet network over copper then you’re using
an RJ45 connector. A bayonet connector is one
that you push in and twist to be able to lock into place. And a common bayonet
connector used for networking is the BNC connector. It stands for Bayonet
Neill-Concelman. It’s created by Paul Neill
at Bell Labs and Carl Concelman at Amphenol. And we commonly see this used
on WAN connections like DS3. We’ll bring in the coax
cable and connect it up through that bayonet connection. These are coax cables,
so they can be relatively rigid and bulky to work with. And if you’re plugging
in a lot of DS3 networks, then you’ll have a lot of BNC
connectors on your patch panel. Another common copper connector
is the DB-9 connector. The D in DB-9 stands for
D-subminiature or D-sub. Specifies this type of
connector that looks like a D. There are different
sizes from DA through DE. You’ll see the DB-25
listed, and the DE-9 is listed here at the bottom. The DB-25 was one of the most
popular serial connector types early on in computing. And when the nine-pin
version of this was released, we started calling it the DB-9
even though technically it’s a DE-9. These are commonly used for
what we call an RS-232 serial connection. And early on in
our computers, we used these for almost
everything, modems, printers, mice, networks,
and anything else that we needed to be able to
send some type of signal over. These days, we don’t commonly
see the 25-pin connection in use. It’s most often the
nine-pin connector, and it’s often used as
a console connection for a router, a switch, or some
other type of infrastructure device. Here’s a back of an older
motherboard that has a DB-25 connector used for printing. There’s a DB-9
serial connection, and that’s what we would
connect our cable to so that we can access a router
or switch at the command line. If you’ve connected cable
television or cable Internet modem, you’ve
probably brought it in through coax with
this F-connector at the end of the cable. It’s usually brought
in on something like an RG-6 cable for
this coax connection, and it uses this
threaded connector. Once you twist it
on to the connector, it’s not coming off
of that connection unless you completely
untwist this F-connector.

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