Openwrt
Openwrt knowledge
NVRAM
NVRAM is the EEPROM of the wrt54g. The Settings stored in the NVRAM is used by openwrt to configure the network interfaces and other settings like timezone and so on.
OLSR
OLSR means Optimized Link State Routing protocol.
OLSR is a routing protocol for mobile ad-hoc networks. The protocol is pro-active, table driven and utilizes a technique called multipoint relaying for message flooding. You can configure multiple openwrt routers to talk to each other to find the best route from point A to point B.
WDS
WDS (Wireless Distribution System) can be used to mae a special tunnel between two openwrt's. It is also supported by many other Accesspoints. I didn't bring it to work so i had been looking for another solution. MESH networks soltuions can do that. OLSR is one implementation for that. AODV is another one.