14.1_Path Determination

Question 1

A process where the router determines which interface to use to forward the packet to the destination

Answer 1

routing

Question 2

The router uses its ___ to determine which path (route) to use to forward a packet

Answer 2

IP routing table

Question 3

The best path in the routing table is also known as the ___.
- the route in the routing table that has the greatest number of far-left matching bits with the destination IP address of the packet

Answer 3

longest match

Question 4

The ___ is a process the router uses to find a match between the destination IP address of the packet and a routing entry in the routing table.

Answer 4

longest match

Question 5

The routing table contains route entries consisting of a prefix (network address) and ___

Answer 5

prefix length

Question 6

For there to be a match between the destination IP address of a packet and a route in the routing table, a minimum number of___ bits must match between the IP address of the packet and the route in the routing table.

Answer 6

far-left

Question 7

The ___of the route in the routing table is used to determine the minimum number of far-left bits that must match.

Answer 7

prefix length

Question 8

True or false
Remember that an IP packet only contains the destination IP address and not the prefix length.

Answer 8

True

Question 9

The route with the greatest number of equivalent far-left bits, or the longest match, is always the ___.

Answer 9

preferred route

Question 10

The term ____ will be used to refer to the network portion of both IPv4 and IPv6 addresses.

Answer 10

prefix length

Question 11

networks that are configured on the active interfaces of a router.

Answer 11

Directly connected network

Question 12

is added to the routing table when an interface is configured with an IP address and subnet mask (prefix length) and is active (up and up).

Answer 12

Directly connected networks

Question 13

___are networks that are not directly connected to the router.

Answer 13

Remote networks

Question 14

Routers learn about remote networks in two ways:
___: Added to the routing table when a route is manually configured.

Answer 14

Static routes

Question 15

Routers learn about remote networks in two ways:
___: Added to the routing table when routing protocols dynamically learn about the remote network. Dynamic routing protocols include Enhanced Interior Gateway Routing Protocol (EIGRP), Open Shortest Path First (OSPF), as well as several others.

Answer 15

Dynamic routing protocols

Question 16

____ specifies a next-hop router to use when the routing table does not contain a specific route that matches the destination IP address

Answer 16

Default route

Question 17

True or false
The default route can be entered manually as a static route or learned automatically from a dynamic routing protocol.

Answer 17

True

Question 18

A default route over IPv4 has a route entry of___and a default route over IPv6 has a route entry of ___.

The___prefix length indicates that zero bits or no bits need to match the destination IP address for this route entry to be used.

Answer 18

0.0.0.0/0
::/0
/0

Question 19

The default route is sometimes referred to as a ____.

Answer 19

gateway of last resort