Networking Basics; General Networking Definitions - Logic Data Systems L-5500 Manual

3.

Networking Basics

3.1.

General Networking Definitions

The L-5500 cellular modem is based on Ethernet connectivity and follows general IP
networking guidelines and terminology. Below are definitions of some basic network
terminology as they pertain to the L-5500 environment.
Term
DNS
DHCP
Dynamic/Static IP
Gateway
LAN
NAT
Packet Data
Port
PPP
Private IP address
Definition
Domain Name System: operates like a phone book to translate domain
names (i.e., google.com) to IP addresses (70.212.19.1).
The L-5500 unit functions as the DNS Server in the network.
Dynamic Host Configuration Protocol: the DHCP server assigns IP addresses,
gateway and subnet masks to all clients on the network.
The L-5500 unit functions as a DHCP Server.
A device with Dynamic IP selected may have a different IP address every
time it connects to the network. A device with a Static IP will always connect
with the same IP address.
A (node) device enabling data transfer between different networks (i.e., from
a private LAN to a public WAN).
Local Area Network. A private network.
Network Address Translation: A technology that allows hosts on the LAN with
private IP addresses to communicate with public IP addresses on the WAN.
This is an essential function of a network router.
Packet Data is used by 3G cellular standards. On a packet data network,
users share a channel and the connection is always on.
A special number present in the header of a data packet in the data transfer
process. Ports are typically used to map data to a particular process running
on a computer.
Point-to-point Protocol: creating a direct link between two nodes in network
communication.
Private IP addresses are addresses that will not be routed on external
networks. Any device on an internal LAN should be assigned a private IP
address to avoid contention. The suggested private address ranges are
Class A: 10.x.x.x
Class B: 172.16.x.x through 172.31.x.x
Class C: 192.168.x.x
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