CCNA 2: Ch 7: Dynamically Flashcards

1
Q

What is the purpose of the passive-interface command?

A

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

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2
Q

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

A
  1. network discovery

2. update and maintain routing tables

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3
Q

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?

A

R1, R3, R5, R7

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4
Q

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

A
  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
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5
Q

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

A

version 2

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6
Q

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

A
  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.
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7
Q

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

A
  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.
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8
Q

Name two [2] distance vectors?

A

RIPv2

EIGRP

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9
Q

Name two [2] link State?

A

OSPF

IS-IS

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10
Q

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

A

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

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11
Q

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

A

default-information originate

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12
Q

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

A

a route dynamically learned through the EIGRP routing protocol

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13
Q

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

A

Serial0/0/1

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14
Q

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

A

S 10.16.0.0/24 [1/0] via 192.168.0.9

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15
Q

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

A
  1. The router has determined the costs associated with its active links.
  2. The router has established its adjacencies
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16
Q

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

A
  1. Contain a next-hop IP address

2. Contain an exit interface

17
Q

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

A

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

18
Q

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

A

BGP (Border Gateway Protocol)

19
Q

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

A

a level 1 ultimate route

20
Q

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

A
  1. calculates its metric using bandwidth

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

21
Q

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

A
  1. a change in the topology

2 . the initial startup of the routing protocol process

22
Q

Why are two [2] reasons to use static routes

A
  1. typically used on stub networks

2. less routing overhead

23
Q

Why are two [2] reasons to use Dynamic Routing

A
  1. new networks are added automatically to the routing table

2. best choice for large networks

24
Q

What are three [3] advantages of link state protocols

A

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

25
Q

What are three [3] disadvantages of link state protocols

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