Course Unit 2 Flashcards
when protocols are used to find networks and update routing tables on routers
Dynamic Routing
is a set of rules used by router when it communicates routing information between neighbor routers
Routing Protocols
Used to rate the trustworthiness of routing information received on a router from a neigbor router.
Administrative Distance (AD)
Administrative distance is an integer from
0-255
0 is most trusted
255 means not traffic (amount of data) will be passed via this route
if one adverstised routes has a lower AD than the other, then router with the ____ AD will be placed in the Routing Table
a. Lowest
b.Highest
Lowest AD
if the router received two updates listing the same remote network the first thing the router checks is the
AD
if both advertised routes to same network have the same AD then ____ will be used to find the best path to the remote network
metrics
routing protocol metrics
if both advertised routes to same network have the same AD, then routing protocol metrics will be used to find the best path to the remote network. The advertised route with the ____ metric will be placed in the routing table
a. Lowest
b. Highest
Lowest metric
if both advertised routes have the same AD and the same metrics, then the routing protocol will
load-balance to the remote network
it sends packets down each link
Three classes of routing protocols
Distance Vector (RIP and IGRP)
Link State
Hybrid
also known as routing by rumor
Distance vector routing protocols
passes complete routing table contents to neighboring routers
Distance vector routing algorithm
routers can not be able to send updates simultaneously to the neighboring routers
Routing loops
Solutions to routing loops
- Maximum Hop Count
- Split Horizon
- Route Poisoning
- Hold Downs
