NETWORKING BASICS
001-9193-001 Version 1
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Sentry 4G 900
TM
User Manual
process. Ports are typically used to map data to a particular process running on
a computer.
PPP
Point-to-point Protocol: creating a direct link between two nodes in network
communication.
Private IP address
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
By default the Sentry 4G unit uses the 192.168.1.x address range.
RIP
Routing Information Protocol, protocol that helps routers dynamically adapt to
changes of network connections by communicating information about which
networks each router can reach and how far away those networks are.
SOFDMA
Scalable OFDMA. With bandwidth scalability, Mobile 802.16-2005 technology
can comply with various frequency regulations worldwide.
SSID
Service Set Identifier. This is a name used to identify a WiFi wireless network.
Subnet
A range of addresses assigned to a LAN.
All devices connected in a Sentry 4G network must be on the same subnet as
the Sentry 4G routers.
Subnet Mask
Binary string that separates the subnet portion of an IP address and the host
portion.
TKIP/AES
“Temporal Key Integrity Protocol” is an encryption method used by the WiFi
interface when operating in WPA mode. TKIP was designed to solve security
issues in WEP (it is considered stronger then WEP).
"Advanced Encryption Standard" is the encryption protocol used by the WiFi
interface when it operates in WPA2 mode.
WAN
Wide Area Network, a public network. The Internet is an example of a WAN.
WEP
Wired Equivalent Privacy. This is an IEEE security protocol for wireless 802.11
networks. It is an encryption method used by the WiFi interface.
WiFi
(802.11b,
802.11g)
Wireless Fidelity is an IEEE 802.11 standard for wireless LANs
802.11b is a standard for operating at 2.4 GHz frequency with data rates up
to 11 Mbps
802.11g is a standard for operating at 2.4 GHz frequency with data rates up
to 54 Mbps
WiFi Access Point
(802.11)
A Sentry 4G unit can operate in 802.11 access point mode. It can
communicate with other devices operating in 802.11 access point mode.
WiFi Client (802.11
Infrastructure
mode)
A Sentry 4G unit can operate in 802.11 Infrastructure mode. In this mode it is
a WiFi client and will try to connect to a WiFi access point.
WLAN
Wireless Local Area Network, a private network. Refers to the network covered
by the WiFi interface.
WPA/WPA2
WiFi Protected Access" is a subset of 802.11i (security mechanisms for wireless
networks).
"WiFi Protected Access 2" is the complete version of 802.11i.
