CCNA V3.1
Semestre 3 - Final

Discutez de ces questions sur le forum Cisco
Back au sommaire

1 Refer to the graphic. Which of the following commands would be used on the router to provide communication between the two hosts connected to the switch?

interface vlan 2
ip address 192.168.2.1 255.255.255.0
no shutdown
interface vlan 3
ip address 192.168.3.1 255.255.255.0
no shutdown

interface fastethernet 0/0
no shutdown
interface fastethernet 0/0.2
encapsulation dot1q 2
ip address 192.168.2.1 255.255.255.0
interface fastethernet 0/0.3
encapsulation dot1q 3
ip address 192.168.3.1 255.255.255.0

interface vlan 2
switchport mode trunk dot1q
interface vlan 3
switchport mode trunk dot11

interface fastethernet 0/0
mode trunk dot1q 2 3
ip address 192.168.2.1 255.255.255.0

2 Refer to the graphic. If the switches are new and have been cabled as shown, which switch will become the root bridge?

SC

CE

JB

JP

JN

cannot be determined from the information given

3 A switch is operating in VTP client mode. What is true about the operations that can be performed by the switch?

VLANs that are created are not included in advertisements.

It can only adopt VLAN changes advertised from a VTP server.

It advertises topology changes out all trunk ports.

It can modify existing VLANs, but can not create new ones.

It can create and modify VLANs, but can not delete existing ones.

4 Why would a network administrator choose to enable authentication for OSPF exchanges? (Choose two.)

to prevent routing information from being falsified

to reduce OSPF information exchange overhead

to assure that OSPF routing information takes priority over RIP or IGRP updates

to encrypt routing tables to prevent unauthorized viewing

to ensure that routing information comes from a valid source

5 A network administrator asked an assistant to remove several VLANs from a switch. When the assistant entered in the no vlan 1 command an error was received. What was the cause of the error?

VLANs can not be deleted until all ports have been removed from the VLAN assignment.

VLANs can only be deleted by the user that created them.

VLAN 1 can not be deleted until another VLAN has been assigned its duties.

VLAN1 is the management VLAN by default and can not be deleted.

The command was not entered properly, which caused a syntax error to occur.

6 Employees of XYZ Company connect their laptop computers to the office LAN using Ethernet ports. The Cisco switches used in the company network are configured with port security. At which layer of the three-layer design model do these switches operate?

physical

distribution

data link

access

core

7 Refer to the graphic. What will be the result of DR elections in the network presented in the graphic using OSPF? (Choose three.)

RTC will be DR of the 10.5.0.0/24 network.

RTD will be DR of the 10.5.0.0/24 network.

RTA will be DR of the 10.4.0.0/24 network.

RTD will be DR of the 10.4.0.0/24 network.

RTB will be DR of the 10.7.0.0/24 network.

RTD will be DR of the 10.7.0.0/24 network.

8 Which of the following statements is true when VTP is configured on a switched network that incorporates VLANs?

VTP is only compatible with the 802.1Q standard.

VTP adds to the complexity of managing a switched network.

All VTP hello packets are routed through VLAN 1 interfaces.

Changes made to the network can be communicated to all switches dynamically.

9 Which of the following tasks must be completed to configure a router interface to serve the newly added network 192.168.10.64/27 and to advertise this network over RIP v2? (Choose three.)

RIP v2 must be configured with the network command and the IP network number for the new network.

RIP v2 must be configured with the network command and the IP host address and subnet mask for the newly activated interface.

The router must be configured with the ip subnet-zero command so that this network can be added and advertised.

A network host address and subnet mask must be applied to the newly activated interface.

The routing protocol must be activated with the router rip and version 2 commands.

RIP v2 must be configured on the other enterprise routers with an entry for the newly added network.

10 Which layer of the hierarchical three-layer design model combines traffic from multiple IDFs?

access

backbone

distribution

core

11 A company has been assigned three Class C addresses and requires the use of supernetting in its addressing scheme. Which routing protocol could be used to configure the company routers to support supernetting? (Choose two.)

a classless routing protocol

a classful routing protocol

OSPF

IGRP

RIP v1

12 Refer to the graphic. What does the mode of FORWARDING mean in the spanning-tree process?

The switch is sending and receiving frames.

The switch is receiving frames, but cannot send frames.

The switch is participating in an election process.

The switch is only receiving BPDUs, not data, and is not sending any type of frames.

13 Refer to the graphic. The network administrator has determined that RTRA needs to be the DR because it is the more powerful router. Which of the following commands would be used to control the election process?

RTRA(config)# interface fastethernet 0/0
RTRA(config-if)# ospf priority 0

RTRA(config)# interface fastethernet 0/0
RTRA(config-if)# ip ospf priority 255

RTRA(config)# ospf priority 1

RTRA(config)# ip ospf priority 255

RTRA(config)# interface fastethernet 0/0
RTRA(config-if)# ip ospf priority 0

14 Which device provides connectivity between IP routed networks and subnetworks?

switch

bridge

router

active hub

15 Which statements describe features of full-duplex Ethernet? (Choose three.)

allows packets to be received and sent simultaneously by a host

requires a minimum of two wires

reduces the number of collisions

allocates between 60 and 80 percent of available bandwidth in both directions

allocates 100 percent of the bandwidth in both directions

increases the number of broadcast domains

16 Refer to the graphic. Both routers are configured using RIP v1. Both routers are sending updates about the directly connected routes. R1 can successfully ping the serial interface of R2. The routing table on R1 does not contain any dynamically learned routes from R2, and the routing table on R2 shows no dynamically learned routes from R1. What is the problem?

Subnetting is not supported by RIP v1.

One of the routers needs a clock rate on the serial interface.

CIDR is not supported by RIP v1.

VLSM is not supported by RIP v1.

17 The network administrator shown in the graphic is connected to Switch3 using a LAN Ethernet connection. The administrator needs to verify configuration settings on the newly installed Switch2. What actions must the administrator take to access Switch2 with a web browser? (Choose three.)

Configure the hostname on Switch2.

Activate the HTTP service on Switch2.

Set the management VLAN password.

Configure IP addressing parameters on Switch2.

Establish host connectivity to Switch2.

18 Refer to the graphic. Router A and C are completely configured and the administrator needs to configure the routing protocol on Router B so that communication occurs throughout the network. Which of the following commands configures routing on Router B?

B(config)# router eigrp 1
B(config)# network 192.168.10.0 0.0.0.3
B(config)# network 192.168.10.4 0.0.0.3
B(config)# network 192.168.10.128 0.0.0.192

B(config)# router eigrp 1
B(config)# network 192.168.10.0 0.0.0.3 area 0
B(config)# network 192.168.10.4 0.0.0.3 area 0
B(config)# network 192.168.10.128 0.0.0.192 area 0

B(config)# router eigrp 1
B(config)# network 192.168.10.0 0.0.0.3 no-summary
B(config)# network 192.168.10.4 0.0.0.3 no-summary
B(config)# network 192.168.10.128 0.0.0.192 no-summary

B(config)# router eigrp 1
B(config-router)# network 192.168.10.0

19 Refer to the graphic. If the network is running OSPF, which subnetworks can be assigned to the serial links between Router2 and the other routers shown in the diagram?

192.1.1.4/30 and 192.1.1.8/30

192.1.1.32/30 and 192.1.1.160/30

192.1.1.96/30 and 192.1.1.100/30

192.1.1.160/30 and 192.1.1.164/30

192.1.1.192/30 and 192.1.1.196/30

20 Which of the following are attributes of link-state routing protocols? (Choose three.)

Periodic updates are sent every 120 seconds to neighboring routers.

Each router sends its entire routing table to neighboring routers.

Routers send updates when a change in the network is detected.

Link-state protocols converge more rapidly than distance vector protocols.

After convergence, link-state protocols use more bandwidth than distance vector protocols use.

Link-state protocols are less prone to routing loops than distance vector protocols.

21 Which command configures the static address shown in the graphic?

Switch1(config)#mac-address-table entry 00e0.2917.1884 VLAN 1 fastethernet 04

Switch1(config-if)#mac-address-table entry static 00e0.2917.1884 VLAN 1 fastethernet 04

Switch1(config)#mac-address-table entry 00e0.2917.1884 fastethernet interface 0/4 VLAN 1

Switch1(config)#mac-address-table static 00e0.2917.1884 interface fastethernet 0/4 VLAN 1

Switch1(config-if)#mac-address-table static 00e0.2917.1884 VLAN 1 fastethernet 04

22 The following command was added to a router's configuration: ip route 192.168.20.0 255.255.255.0 172.16.15.3. What will adding this command accomplish? (Choose two.)

A default route will be created.

A static route will be created.

Information about the 192.168.20.0 network learned dynamically will be ignored as long as the static route exists.

All packets with an unknown destination address will be forwarded out interface 192.168.20.245.

The route will be added as a RIP route in the routing table.

23 Refer to the graphic. Switch 2 has computers attached that belong to VLAN 2. Switch 3 has computers attached that belong to VLAN 3. Switch 1 is a Cisco 2926G Layer 3 switch that has a route module installed. Switch 1 provides connectivity to the other switches and is used to route between the VLANs. At which layer of the three-layer switch design model does Switch 1 operate?

physical

data link

core

access

network

distribution

24 Which command is used to obtain the information presented in the above graphic?

show vlan ifindex

show vlan id

show vlan brief

show running-config

25 Refer to the graphic. Two Catalyst switches with ports configured for VLANs 3 and 4 are connected. The hosts on SW-A and SW-B need to communicate with one another. Which of the following commands is used to configure Port 1 on SW-B? Note that SW-B Port 1 used to have a host connected to it before the switch was connected to SW-A.

(config)# interface vlan 1
(config-subif)# ip address 192.168.10.1 255.255.255.0
(config-subif)# no shutdown

(config)# interface fastethernet 0/1
(config-if)# vlan 1 trunk
(config-if)# switchport mode trunk dot1q

(config)# interface fastethernet 0/1
(config-if)# switchport mode trunk

(config)# interface vlan 1
(config-subif)# switchport mode trunk dot1q

26 How do EIGRP routers actively maintain neighbor relationships?

by the exchange of hello packets with neighboring routers

by dynamically learning new routes from neighbors

by the exchange of neighbor tables with directly attached routers

by comparing known routes to received updates

by the exchange of routing tables with directly attached routers

by continuously monitoring the status of the router ports

27 What is the first step in the spanning-tree process?

elect a designated switch

use a router to locate a default gateway

elect a root bridge

determine the path cost of each active port on the switch

28 Refer to the graphic. Which commands would direct outbound traffic from R1 to the ISP and inbound traffic from the ISP to network 200.1.1.0?

R1(config)# ip route 144.1.1.0 255.255.255.192 serial 0/0
ISP(config)# ip route 0.0.0.0 0.0.0.0 serial 0/1

R1(config)# ip route 0.0.0.0 0.0.0.0 serial 0/0
ISP(config)# ip route 0. 0.0.0 0.0.0.0 serial 0/0

R1(config)# ip route 0.0.0.0 0.0.0.0 serial 0/0
ISP(config)# ip route 200.1.1.0 255.255.255.0 serial 0/1

R1(config)# ip route 144.1.1.0 255.255.255.192 serial 0/0
ISP(config)# ip route 200.1.1.0 255.255.255.0 serial 0/1

29 Which switching method increases latency and reliability more than any other method?

cut-through

fast-forward

fragment-free

store-and-forward

30 Consider the networks shown in the graphic. Which of the following is the correct configuration for Router B if OSPF is being used as the routing protocol?

B(config)# router ospf 0
B(config-router)# network 10.10.10.64 0.0.0.31 area 0
B(config-router)# network 10.10.10.0 0.0.0.3 area 0

B(config)# router ospf 1
B(config-router)# network 10.10.10.64 0.0.0.63 area 0
B(config-router)# network 10.10.10.0 0.0.0.3 area 0

B(config)# router ospf 99
B(config-router)# network 10.10.10.64 255.255.255.224 area 0
B(config-router)# network 10.10.10.0 255.255.255.248 area 0

B(config)# router ospf 1
B(config-router)# network 10.10.10.64 0.0.0.31 area 0
B(config-router)# network 10.10.10.0 0.0.0.3 area 0

31 What does a constant amber SYSTEM LED indicate on a Catalyst switch?

The switch is going through POST.

The switch is in the process of initializing ports.

The switch has failed POST.

The switch has passed POST and is working properly.

32 Refer to the graphic. What is the first parameter used to determine which switch is selected as the root bridge in the spanning-tree process?

 

highest Layer 2 address

highest priority number

highest path cost

lowest Layer 2 address

lowest priority number

lowest path cost

33 A network administrator is having problems with excessive collisions on the corporate network. If the network currently uses hubs, what is the most cost effective way to reduce collisions?

add additional hubs

replace hubs with switches

replace hubs with access points

add a router to every hub segment

34 One part of the network shown in the graphic uses IGRP and another part uses EIGRP. Which statement is true about this network?

IP traffic will not be routable from network 192.168.1.0 to network 10.1.1.0.

The autonomous system number in the IGRP network must be converted to an EIGRP autonomous system number.

The route to network 192.168.1.0 will be tagged as external by the EIGRP routers.

The IGRP router will classify routes learned from the EIGRP routers as internal.

The IGRP router will not detect EIGRP routers.

EIGRP is not backward compatible and the IGRP routes will not be detected.

35 Which of the following features do RIPv1 and RIPv2 have in common? (Choose three.)

hop count as a metric

classless routing

use split horizon

maximum hop count is 15

broadcast updates

no authentication

36 When configuring the networks that need to be advertised on a router using EIGRP, which of the following can be configured on the router? (Choose three.)

the network number

subnet mask

wildcard mask

process number

area ID

autonomous system number

37 Refer to the graphic. The host on VLAN 2 cannot communicate with the host on VLAN 3. Which of the following could be the problem based on the output of the show interface fastethernet 0/1 command from the switch?

The switch port 1 is not set to access mode.

The router interface connected to switch port 1 is shut down.

The router is not configured for trunking.

The switch port is not configured for full duplex or a speed of 100 Mbps.

38 Refer to the graphic above. The network has stabilized and SW-F has been elected root bridge of the STP tree. Network traffic indicates that SW-A would be a better selection for the root bridge. How can the network administrator accomplish this task?

change the bridge priority of SW-F to a lower value

change the bridge priority of SW-F to a higher value

change the bridge priority of SW-A to a lower value

change the bridge priority of SW-A to a higher value

39 Refer to the graphic. Which of the following commands is used to configure switch port 2 for the host on VLAN 2?

(config)# interface fastethernet 0/2
(config-if)# switchport mode access
(config-if)# switchport access vlan 2

(config)# interface vlan 2
(config-subif)# switchport mode access 2

(config)# interface vlan 2
(config-subif)# switchport mode trunk dot1q

(config)# interface fastethernet 0/2
(config-if)# vlan 2

40 Which of the following statements are true about routers that are running EIGRP? (Choose three.)

They can support multiple routed protocols.

They can support only link-state protocols.

They send their entire routing tables to neighboring routers.

They send partial routing updates in response to topology changes.

They send routing updates to all other routers in the network.

They use hello packets to inform neighboring routers of their status.

41 A network administrator located at the East site needs to check the configuration of a switch located at the Corporate site. The show hosts command is entered on the East router but does not produce any output. Which command can be used to gain access to the Corporate LAN switch assuming the switch is assigned the IP address 172.16.15.5/24?

dial Corporate 172.16.15.5

line vty 0 4
telnet

telnet Corporate

telnet 172.16.15.5

42 What is an advantage of building a network such as the one shown in the graphic?

provides multiple paths for connectivity in the event of link failure

provides alternate routes when spanning tree has a problem

provides alternate network routes when the Spanning Tree Protocol is converging

provides concurrent paths for faster data transfers

43 What type of connectivity (refer to point A in the graphic) is required between SW1 and SW2? Note that SW1 has VLANs 2, 3, 4, and 5 configured and SW2 has VLANs 5, 6, 7, and 8 configured. Also, the computers on the same VLAN need the ability to communicate with one another.

access

channel

interVLAN

intraVLAN

trunk

44 Refer to the graphic and the following configurations from the routers. Router A is not receiving any OSPF routes from the other routers. Based on the Router A and Router B configurations, what is the problem?

A# show running-config
--output omitted--
interface Fastethernet 0/0
ip address 192.168.10.65 255.255.255.192
interface Serial 0/0
ip address 192.168.10.2 255.255.255.252
clockrate 64000
router ospf 1
network 192.168.10.0 0.0.0.3 area 0
network 192.168.10.64 0.0.0.63 area 0

B# show running-config
--output omitted--
interface Fastethernet 0/0
ip address 192.168.10.129 255.255.255.192
interface Serial0/0
ip address 192.168.10.2 255.255.255.252
interface Serial0/1
ip address 192.168.10.5 255.255.255.252
clockrate 56000
router ospf 2
network 192.168.10.0 0.0.0.3 area 0
network 192.168.10.4 0.0.0.3 area 0
network 192.168.10.128 0.0.0.63 area 0

duplicate IP address

mismatched OSPF process IDs

mismatched OSPF timers

mismatched clock rates

45 Refer to the graphic. Routers A and B are running EIGRP and Router C is running IGRP. Which of the following is necessary for Router C to automatically see routes from Routers A and B?

Routers B and C must use the same autonomous system number, but Router A can use a different autonomous system number.

Routers A, B, and C must all use the same autonomous system number.

Routers B and C must both use the redistribute igrp as_number command.

No commands are necessary. EIGRP routes are always seen by IGRP routers.

46 Which of the following is true about Spanning Tree Protocol? (Choose two.)

eliminates physical loops in network topologies

eliminates logical loops in network topologies

can only be used in networks where routers are installed

can only be used in networks where switches are incorporated into the design

can only be used in networks where both routers and switches are used

47 A company with the address 192.168.3.0 needs an address scheme that supports ten networks with a maximum of seven hosts per segment. The network administrator wants to use VLSM for the most efficient use of addresses. What is a valid address to assign to one of the LAN links?

192.168.3.192

192.168.3.209

192.168.3.223

192.168.3.225

192.168.3.235

48 Which of the following commands can be used to configure the default management VLAN on a Cisco Catalyst switch?

(config)# interface fastethernet 0/1
(config-if)# ip address 10.0.0.1 255.255.255.0
(config-if)# no shutdown

(config)# interface vlan 1
(config-subif)# ip address 10.0.0.3 255.255.255.0
(config-subif)# no shutdown

(config)# interface management vlan
(config-subif)# ip address 10.0.0.3 255.255.255.0
(config-subif)# no shutdown

(config)# interface fastethernet 0/1
(config-if)# switchport mode vlan 1
(config-if)# no shutdown

49 When should EIGRP automatic summarization be turned off?

when a router has not discovered a neighbor within three minutes

when a router has more than three active interfaces

when a router has discontiguous networks attached

when a router has less than five active interfaces

50 Consider the network shown in the graphic. Which of the following IP addresses would be valid for a company that is leasing a single Class C network address and using VLSM for maximum efficiency?

200.1.1.64 /26 for the 50 users
200.1.1.128 /27 for the 25 users
200.1.1.176 /27 for the 10 users
200.1.1.192 /30 for one pair of serial links
200.1.1.196 /30 for the second pair of serial links

200.1.1.0 /26 for the 50 users
200.1.1.80 /27 for the 25 users
200.1.1.96 /27 for the 10 users
200.1.1.128 /30 for one pair of serial links
200.1.1.132 /30 for the second pair of serial links

200.1.1.64 /26 for the 50 users
200.1.1.128 /27 for the 25 users
200.1.1.160 /28 for the 10 users
200.1.1.176 /30 for one pair of serial links
200.1.1.180 /30 for the second pair of serial links

200.1.1.0 /26 for the 50 users
200.1.1.64 /26 for the 25 users
200.1.1.128 /27 for the 10 users
200.1.1.192 /30 for one pair of serial links
200.1.1.192 /30 for the second pair of serial links

Discutez de ces questions sur le forum Cisco
Back au sommaire