RIP - Routing Information Protocol
RIP (Routing Information Protocol) is a distant vector routing protocol. RIP algorithm has been in use since the early days of ARPAnet. Currently, there are 2 versions of RIP, which are known as Routing Information Protocol version 1 (RIPv1) and Routing Information Protocol version 2 (RIPv2). More information about RIPv1 can be found on (RFC1058) and more information about RIPv2 can be found on (RFC 1723). RIPv1 supports only classful routing and RIPv2 uses classless routing. This means RIPv2 support Variable length Subnet Mask (VLSM).
RIP is a UDP based protocol that uses port 520 for all communication. RIP was designed for small to medium sized networks. RIP uses hop count as a metric. RIP supports maximum 15 hops. The maximum size of RIPv1 or RIP2 packet is 512 octets. RIP has the administrative distance of 120.
Route update timer
Every 30 seconds, a Cisco router will send a RIP update out every interface that has a RIP network attached to it. Each update contains the entire routing table of the sending router. When another router on the network receives the update, it adds any new routes to its routing table or will replace a route if the update has a lower hop count for that route.
Route Invalid Timer
Route invalid timer is 180 seconds. If router does not receive any update about a particular router for that period, then router will find out that this route has become invalid.
Route Flush Timer
Sets the time between a route becoming invalid and its removal from the routing table (240 seconds).
M. Aslam is the owner of http://www.FreeTechExams.com, Central resource for people who are looking for free CCNA Practice Exams and Study Guide.
Source: http://ezinearticles.com/
Added: March 9, 2008
Three men rip off elderly Portland woman who once tailed a thief - The Oregonian - OregonLive.com
The Oregonian - OregonLive.com Three men rip off elderly Portland woman who once tailed a thief The Oregonian - OregonLive.com, OR - by Maxine Bernstein, The Oregonian The OregonianJeanette Stewart with her late husband, Douglas. The couple used to lunch every day at their neighborhood ...'Drivers Victims Of Fuel Rip-Off' - Sky News
Ocean City Officials Watch Out For Rip Currents - WMDT
Boston Globe Ocean City Officials Watch Out For Rip Currents WMDT, MD - By ELAINA ATHANS -- WMDT 9 4 2008 Officials in Ocean City say rip currents are expected increase because of the Tropical Storm. Right now, the Ocean City ... Tropical Storm Hanna aiming for Massachusetts Hanna brings rip currents, uncertainty Rip Current Danger High Due To Hanna -