Glossary
TAINY iQ
Page 137 of 147
Long Term Evolution
(LTE)
LTE is the 4
th
generation of mobile radio network, which allows a significant
higher data transmission rate, than the 3
nd
generation UMTS. It is possible
to download up to 300 MB per second. The frequency range used by LTE-
providers is solely on UHF-frequency band. Multiple frequencies are used
varying regionally between the middle and upper section of the UHF-range
from 700 to 2600 MHz
MCC/MNC
The MCC (Mobile Country Code) and the MNC (Mobile Network Code) are
unique worldwide identifiers for a mobile radio network.
The MCC is three-digit and the MNC are two- or three-digit long.
There are many websites on the internet with the MCC/MNC of various
countries and network operators.
MIB
See SNMP
NAT (Network Address
Translation)
With network address translation (NAT), often called IP masquerading, an
entire network is "hidden" behind a single device, known as the NAT router.
The internal computers of the local network remain concealed with their IP
addresses in the local network when they communicate outwardly through
the NAT router. Only the NAT router with its own IP address is visible to
outside communication partners.
However, in order for internal computers to be able to communicate directly
with external computers (on the internet), the NAT router must change the IP
datagrams to and from the internal computer to the outside.
If an IP datagram is sent from the internal network to the outside, the NAT
router changes the IP and TCP header of the datagram. It switches the
source IP address and the source port with its own official IP address and its
own, previously unused port. For this purpose, it maintains a table which
establishes the allocation of the original with the new values.
Upon receipt of a response datagram, the NAT router recognises that the
datagram is actually intended for an internal computer on the basis of the
specified target port. Using the table, the NAT router exchanges the target
IP address and the target port and forwards the datagram to the internal
network.
Network mask / Subnet
mask
A company network with access to the internet is normally officially assigned
only to a single IP address, e.g. 134.76.0.0. In this example address it can
be seen from the 1st byte that this company network is a Class B network,
i.e. the last 2 bytes can be used freely for host addressing. Arithmetically
that represents an address space of 65,536 possible hosts (256 x 256).
Such a huge network is not very practical. In this case it is necessary to form
subnetworks. This is accomplished by using a subnet mask. Like an IP
address, this is a 4 bytes long field. The value 255 is assigned to each of the
bytes that represent the network address. The main purpose is to "hide" a
part of the host address range in order to use it for the addressing of
subnetworks. For example, in a Class B network (2 bytes for the network
address, 2 bytes for the host address), by means of the subnet mask
255.255.255.0 it is possible to take the 3rd byte, which was actually intended
for host addressing, and use it now for subnet addressing. Arithmetically that
means that 256 subnets with 256 hosts each could be created.
Summary of Contents for TAINY IQ-LTE
Page 1: ...TAINY IQ LTE User Manual ...
