ALTERNATIVE NAME: Your external IP
address is also called your public IP
EXPLANATION: IP stands for
Internet Protocol, the set of rules that govern the way
computers communicate back and forth using the Internet. To fit in with those rules,
computers are allocated unique sets of four numbers called IP addresses.
(However, in the future you may come across a different format called
IPv6 which is being introduced.)
YOUR ISP CAN CHANGE IT: Note that your external
IP address is occasionally changed by your
ISP (Internet Service Provider) despite no action being taken on your part.
almost always allocate you a different IP address whenever you restart
your modem and reconnect with them.
- However, some users,
particularly businesses and people running servers, pay extra
to have a static IP address which does not change.
IP CHECKER: So - come back to this page to
check your IP address again when
you need to.
What is my
internal IP address? As well
as a public or external IP address like your one above, people using
a home network with a
router also have individual internal IP
addresses for each computer and other device, including the router itself. (A router
is a connecting device usually combined with your modem.)
find the internal IP address of the
computer you are using, follow these steps.
YOU CONTROL THE INTERNAL IP ADDRESSES: The router's internal IP
address is normally set for you (but not fixed) by the
manufacturer. The other internal IP addresses are set
by you or by whoever has set up your home network (sometimes the
addresses are allocated automatically during this process). It is best
to leave them alone. Above all, avoid having two devices with the same
IPv6 ADDRESSES: Most people won't need to
bother right now, but if you really are interested in information about
the newIPv6 IP addresses, see one of these
websites: Use IPv6 What is my v6
What is my MAC address?
EXPLANATION: Your "MAC address"
is the address of the network card inside your computer,
where your network cable plugs in.
WHY IT IS CALLED
stands for "media access control". The term does
NOT originate from Apple "Mac" computers.
FINDING YOUR MAC ADDRESS: You can
find your MAC address by adding this step to the
STEPS above: - type: getmac
- then look for your
MAC address: -- it is normally called Physical Address
consists of six or seven pairs of digits and letters,
CAN YOU CHANGE THE MAC ADDRESS?
The MAC address
is not only set by the manufacturer of the network card but is
burned-into one of the components of the card. - Unlike an IP address,
MAC address is a fixed address. - However,
you can usually place a
copy of this MAC address in a location called a
local MAC address where of course the copy can be changed.