CCNA 2: Ch 7: Dynamically

Question 1

What is the purpose of the passive-interface command?

Answer 1

Allows a router to receive routing updates on an interface but not send updates via that interface

Question 2

What two [2]tasks do dynamic routing protocols perform?

Answer 2

1. network discovery

2. update and maintain routing tables

Question 3

Refer to the exhibit. OSPF is used in the network. Which path will be chosen by OSPF to send data packets from Net A to Net B?

Answer 3

R1, R3, R5, R7

Question 4

Which two [2] statements are true regarding classless routing protocols?

Answer 4

1. allows for use of both 192.168.1.0/30 and 192.168.1.16/28 subnets in the same topology
2. sends subnet mask information in routing updates

Question 5

The command ____ is used in RIP router configuration mode to enable the sending of subnet masks with the routing updates.

Answer 5

version 2

Question 6

What two [2] actions result from entering the network 192.168.1.0 command in RIP configuration mode on a router?

Answer 6

1. Routing updates are sent through all the interfaces belonging to 192.168.1.0
2. The network address 192.168.1.0 is advertised to the neighbor routers.

Question 7

Based on the partial output from the show ip route command, what two facts can be determined about the RIP routing protocol?

Answer 7

1. The command no auto-summary has been used on the RIP neighbor router.
2. RIP version 2 is running on this router and its RIP neighbor.

Question 8

Name two [2] distance vectors?

Answer 8

RIPv2

EIGRP

Question 9

Name two [2] link State?

Answer 9

OSPF

IS-IS

Question 10

In the context of routing protocols, what is a definition for time to convergence?

Answer 10

the amount of time for the routing tables to achieve a consistent state after a topology change

Question 11

When configuring RIPng, the ”______” command instructs the router to propagate a static default route.​

Answer 11

default-information originate

Question 12

A destination route in the routing table is indicated with a code D. Which kind of route entry is this?

Answer 12

a route dynamically learned through the EIGRP routing protocol

Question 13

Which interface will be the exit interface to forward a data packet with the destination IP address 172.16.0.66?

Answer 13

Serial0/0/1

Question 14

Which route is the best match for a packet entering a router with a destination address of 10.16.0.2?

Answer 14

S 10.16.0.0/24 [1/0] via 192.168.0.9

Question 15

Which two [2] requirements are necessary before a router configured with a link-state routing protocol can build and send its link-state packets?

Answer 15

1. The router has determined the costs associated with its active links.
2. The router has established its adjacencies

Question 16

Which two [2] requirements are used to determine if a route can be considered as an ultimate route in a router’s routing table?

Answer 16

1. Contain a next-hop IP address

2. Contain an exit interface

Question 17

What is different between IPv6 routing table entries compared to IPv4 routing table entries?

Answer 17

By design IPv6 is classless so all routes are effectively level 1 ultimate routes.

Question 18

Which dynamic routing protocol was developed as an exterior gateway protocol to interconnect different Internet providers?

Answer 18

BGP (Border Gateway Protocol)

Question 19

Which route will a router use to forward an IPv4 packet after examining its routing table for the best match with the destination address?

Answer 19

a level 1 ultimate route

Question 20

Which two [2] statements describe the OSPF routing protocol?

Answer 20

1. calculates its metric using bandwidth

2. uses Dijkstra’s algorithm to build the SPF tree

Question 21

Which two [2] events will trigger the sending of a link-state packet by a link-state routing protocol?

Answer 21

1. a change in the topology

2 . the initial startup of the routing protocol process

Question 22

Why are two [2] reasons to use static routes

Answer 22

1. typically used on stub networks

2. less routing overhead

Question 23

Why are two [2] reasons to use Dynamic Routing

Answer 23

1. new networks are added automatically to the routing table

2. best choice for large networks

Question 24

What are three [3] advantages of link state protocols

Answer 24

1.event-driven updates
2 building a topological map
3. fast convergence

Question 25

What are three [3] disadvantages of link state protocols

Answer 25

1. bandwidth consumption 2. memory usage 3. CPU processing time