AirLive IGR-842PoE, User Manual, Page: 298 / 299

10. Network Glossary
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AirLive IGR-842POE User Manual
SNMP
Simple Network Management Protocol. A set of protocols for managing complex networks.
The SNMP network contains three key elements: managed devices, agents, and
network-management system (NMS). Managed devices are network devices that contain
SNMP agents. SNMP agents are programs that reside SNMP capable device’s firmware to
provide SNMP configuration service. The NMS typically is PC-based software that can
monitor and control managed devices remotely.
Subnet Mask
An address code mask that determines the size of the network. An IP subnet are
determined by performing a BIT-wise AND operation between the IP address and the
subnet mask. By changing the subnet mask, you can change the scope and size of a
network.
TFTP
Trivial File transfer Protocol. A file transfer protocol, with the functionality of a very basic
form of FTP. It is used to transfer small amounts of data between hosts on a network, such
as Switch firmware.
The switch port can auto detect straight or crossover cable when you link switch with other
Ethernet device. For the RJ-45 connector should use correct UTP or STP cable,
10/100Mbps port use 2 pairs twisted cable and Gigabit 1000T port use 4 pairs twisted cable.
If the RJ-45 connector is not correct pin on right position then the link will fail. For fiber
connection, please notice that fiber cable mode and fiber module should be match.

Faulty or loose cables
Look for loose or obviously faulty connections. If they appear to be OK, make sure the
connections are snug. IF that does not correct the problem, try a different cable.

Non-standard cables
Non-standard and miss-wired cables may cause numerous network collisions and other
network problem, and can seriously impair network performance. A category 5e-cable
tester is a recommended tool for every 100Base-T network installation.