Routing Facts

Question 1

Router

Answer 1

• Device that sends packets from one network to another
• Receive packets read their headers to find addressing information and forward hem to the correct destination on the network or internet
• Forward packets through an internetwork by maintaining routing information in a database called a routing table

Question 2

Routing table contain what type of information?

Answer 2

• Address of a known network
• The interface or next hop router used to reach the destination network
• Cost value(metric) that identifies the desirability of the route to the destination network (using distance delay or cost)
• A timeout value that identifies when the route expires

Question 3

Static routing

Answer 3

• Requires entries in the table be configured manually
• Network Entries remain in the table until manually removed
• When changes to the network occur static entries must be modified added or removed

Question 4

Dynamic routing

Answer 4

• Learn about networks by sharing routing information with other routers.
• Routing protocol defines how routers communicate with each other in order to share and learn about other networks

Question 5

Dynamic routing protocol determines:

Answer 5

• The information that is contained in the routing table
• How messages are routed from one network to another
• How topology changes (i.e. updates to the routing table) are communicated between routers