Test Bank Questions and Answers for computer networking- routers Already Passed

Test Bank Questions and Answers for computer networking- routers Already Passed What are a routers 2 functions - Answers -to deliver a packet to a host that is on one of their connected networks - create routing tables by sharing information with other routers ( this is how they gather info about networks they are not connected to) What do routers communicate with each other about - Answers -what networks they handle -what other routers they know about - what are the fastest paths What are the 3 goals of a router - Answers 1) have a system for rating a path 2) create a routing table that keeps track of other routers and the networks they handle 3)convergence - have completely updated routing table information after changes occur What is static routing - Answers When the network admin sets routing tables manually Administrative distance rating - Answers Low is good high is bad (it means you closer to the network when it's low) What is a routing table - Answers A set of rules that is used to determine where data packets traveling over an IP network will be detected What are three ways entries can Happen - Answers 1) static- administrator types them in 2) automatic- the connected networks are included by default 3) dynamic- a routing protocol gives info about a remote network What are the link state routing protocols - Answers Is-is Ospf Why is Ospf used most - Answers It's very common and very fast- it opens the shortest path first What does link state do - Answers Sends out lsa to tell where it is, what is connected, how fast it is .... Routers use lsa I for to build a map of routes What does distance vector do - Answers Makes decisions based on how far in which direction What are the distance vector protocols - Answers Rip- uses hop count Ripv2- uses hop count is faster than rip Bgp- routes only between autonomous systems I.e. Stand alon networks Hop count - Answers How many routers will it hit on the way to the destination What are hybrid protocols - Answers A mixture of link state and distance vector What is the hybrid protocols - Answers Eigrp- only works on Cisco What does hybrid do instead of hop count - Answers It looks at bandwidth and how much delay is on a connection what is routing convergence time - Answers Time required by switch ports to update their link status and transition to the forwarding state What is the Best rating in a routing table - Answers The lowest administrative distance Does igp, Bgp, rip, Isis use next hop metric in deciding how to route traffic - Answers Rip uses next hop metric