www.mxtoolbox.com/
www.whatismyip.com/
network-tools.com/
http://www.dnsstuff.com/

grep 'show_month' -R *
fgrep GetElementByName *
find / -type f -exec grep -H 'Linux123' {} \;

BSCI Notes

Exchange 'hello messages' between same linkA neighbor table is a list ofconnected OSPF speakers (devices running OSPF).OSPF speakers send multicast hellos with destination address 224.0.0.5 on all OSPF-enabled interfacesOSPF sends out hello packets every 10 sec on broadcast link, 30 sec on a nonbroadcastAfter the routers have synchronized thier information, they are adjacent.
Neighbor relationship states:1. Down - first neighbor state, no hellos received2. Attempt - only valid for mannually confgured neig in an NBMA envi. In this state the router sends unicast hello packetsInit— This state indicates that the router has received a hello packet from its neighbor,but the receiving router's ID was not included in the hello packet.• 2-Way— This state indicates that bi-directional communication has been establishedbetween two routers.• Exstart— Once the DR and BDR are elected, the actual process of exchanging linkstateinformation can start between the routers and their DR and BDR.• Exchange— In the exchange state, OSPF routers exchange database descriptor(DBD) packets.• Loading— In this state, the actual exchange of link-state information occurs.• Full— In this state, routers are fully adjacent with each other. All the router andnetwork LSAs are exchanged and the router databases are fully synchronized