Day 11 (part 1) Flashcards - Routing Fundamentals

Question 1

A […] route is a route to the actual IP address configured on the interface.

Answer 1

local

Question 2

A […] route is a route to the network the interface is connected to.

Answer 2

connected

Question 3

A […] route is added to the routing table by a protocol (ie. OSPF) that allows routers to communicate with each other and share routing information.

Answer 3

dynamic

Question 4

A […] route is manually configured by a network engineer/admin.

Answer 4

static

Question 5

If a packet’s destination IP is matched by multiple routes, which route will the router select?

Answer 5

The most specific matching route

Question 6

Local routes use a prefix length of […]

Answer 6

/32

Question 7

Most specific matching route = the matching route with the […]

Answer 7

longest prefix length

Question 8

Routers store routes to all of their known destinations in the […]

Answer 8

routing table

Question 9

Show the routing table:
R1# […]

Answer 9

show ip route

Question 10

The next router in the path to the destination is called the […].

Answer 10

next hop

Question 11

What does code C in the routing table mean?

Answer 11

Connected

Question 12

What does code L in the routing table mean?

Answer 12

Local

Question 13

What prefix length do connected routes use?

Answer 13

The prefix length configured on the interface.

Question 14

What will a router do if none of its routes match a packet’s destination IP address?

Answer 14

Drop the packet

Question 15

When routers receive packets, they look in the […] to find the best route to forward that packet.

Answer 15

routing table

Question 16

Which two routes are automatically added to the routing table when you configure an IP address on an interface?

Answer 16

1) a connected route
2) a local route

Question 17

A […] route is often used to direct traffic to the Internet.

Answer 17

default

Question 18

A default route is a route to [network]/[netmask].

Answer 18

0.0.0.0/0

Question 19

Code […] in the routing table indicates a candidate default route.

Answer 19

*

Question 20

Code […] in the routing table indicates a static route.

Answer 20

S

Question 21

Configure a default route, specifying the next-hop IP:
R1(config)# […]

Answer 21

ip route 0.0.0.0 0.0.0.0 next-hop

Question 22

Configure a static route, specifying the exit-interface and next-hop IP:
R1(config)# […]

Answer 22

ip route ip-address netmask exit-interface next-hop

Question 23

Configure a static route, specifying the exit-interface:
R1(config)# […]

Answer 23

ip route ip-address netmask exit-interface

Question 24

Configure a static route, specifying the next-hop IP:
R1(config)# […]

Answer 24

ip route ip-address netmask next-hop

Question 25

For an end host like a PC to send packets outside of its local network, it will send the packets to its […].

Answer 25

default gateway

Question 26

In the routing table, the output “Gateway of last resort is not set” means […]

Answer 26

a default route has not been configured

Question 27

Static routes in which you specify only the […] appear as directly-connected in the routing table.

Answer 27

exit-interface

Question 28

The […] route is the least specific route possible.

Answer 28

default

Question 29

To send a packet to a destination, does a router need a route to every network in the path to the destination?

Answer 29

No
(It only needs a route to the destination network)