CCNA 3 FINAL EXAM ANSWERS SEP 2011

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Which three statements accurately describe VLAN types? (Choose three).
A management VLAN is any VLAN that is configured to access management features of the switch.
A data VLAN is used to carry VLAN management data and user-generated traffic.
After the initial boot of an unconfigured switch, all ports are members of the default VLAN.
An 802.1Q trunk port, with a native VLAN assigned, supports both tagged and untagged traffic.
Voice VLANs are used to support user phone and e-mail traffic on a network.
VLAN 1 is always used as the management VLAN.

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Refer to the exhibit. What is the maximum number of VLANs that can be deleted from the Switch as it is configured?
zero
four
five
eight
nine

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Refer to the exhibit. Which statement is true about the status of interface Fa0/1?
The interface is not configured to transmit data.
The interface is configured to transmit data at 10 Mb/s speed.
The interface is configured to transmit data in half-duplex mode.
The interface is configured to use HDLC encapsulation to transmit data.

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4

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Refer to the exhibit. A new switch, SW3, has been added to the network. The network administrator determines that VLAN information is not propagating to SW3. Which command will remedy the problem?
SW1(config)# vtp version 1
SW2(config)# vtp mode client
SW3(config)# vtp domain Cisco1
SW3(config)# vtp mode transparent

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5

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When an access point is placed near the outside wall of a building, which implementation design procedure should be used?
Disable SSID cloaking.
Lower the encryption level.
Decrease the power setting.
Disable MAC address filtering.
Modify the Network Mode to Wireless-G.

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6

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A network administrator enters the enable command at the Switch> prompt of a new switch. What mode will the switch enter?
setup mode
configuration mode
privileged EXEC mode
user EXEC mode
ROMMON mode
interface mode

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7

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Refer to the exhibit. What is true of the configuration of switch S1?
A Cisco proprietary protocol is in use for ports Fa0/1 and Fa0/3.
Switch ports Fa0/1 and Fa0/3 have been configured with the switchport mode access command.
Untagged frames received on ports Fa0/1 and Fa0/3 will be placed on VLAN 1.
Switch ports Fa0/1 and Fa0/3 are configured to carry data from multiple VLANs.

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8

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Refer to the exhibit. The bridge priority of each switch in the network is set at the default value. Which switch will be the designated root bridge?
SW1
SW2
SW3
SW4

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9

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What is a possible impact of setting too short an aging time in the MAC address table of a switch?
overly large address table
unnecessary flooding of packets
excessive timeouts of static addresses
impaired ability to dynamically learn new addresses

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10

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Refer to the exhibit. The network administrator needs to remove the east-hosts VLAN and use the switch port from that VLAN in one of the existing VLANs. Which two sets of commands should be used when completely removing VLAN 2 from S1-Central while leaving the switch and all its interfaces operational? (Choose two.)
S1-Central# reload
S1-Central# erase flash:
S1-Central# delete flash:vlan.dat
S1-Central# configure terminal
S1-Central(config)# no vlan 2
S1-Central# configure terminal
S1-Central(config)# interface fastethernet 0/1
S1-Central(config-if)# switchport access vlan 3

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11

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Refer to the exhibit. What does the term DYNAMIC indicate in the output that is shown?
This entry can only be removed from the MAC address table by a network administrator.
When forwarding a frame to the device with address 0060.5c5b.cd23, the switch does not have to perform a lookup to determine the final destination port.
Only the device with MAC address 0060.5c5b.cd23 will be allowed to connect to port Fa0/18.
The switch learned this MAC address from the source address in a frame received on Fa0/18.

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12

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Which statement is correct about STP architecture?
Spanning Tree Protocol will guarantee a loop free Layer 2 topology.
Spanning Tree Protocol guarantees the shortest path to destination networks.
The switch with the highest priority will be assigned the lowest BID in the root election.
The first step in the spanning-tree election process is to determine the root port.
To select designated ports, the spanning-tree algorithm must determine the longest contiguous path from the root bridge.

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13

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The network administrator wants to configure a switch to pass VLAN update information to other switches in the domain but not update its own local VLAN database. Which two steps should the administrator perform to achieve this? (Choose two.)
Reset the VTP counters.
Configure VTP version 1 on the switch.
Configure the VTP mode of the switch to transparent.
Verify that the switch has a higher configuration revision number.
Configure the switch with the same VTP domain name as other switches in the network.

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14

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Refer to the exhibit. An administrator issues the commands as shown on SwitchB. What is the result for port Fa0/22?
The port is disabled.
Security is enabled on the port.
The port becomes a trunk port.
The port is now a member of the default VLAN.

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15

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Refer to the exhibit. VTP pruning is enabled in the VTP domain that is shown. How will switch ST-1 handle Layer 2 broadcast traffic originating from host A on switch ST-C?
It will be dropped.
It will be forwarded out port Fa0/5 only.
It will be forwarded out ports Fa0/5 and Fa0/10.
It will be forwarded out ports Fa0/5, Fa0/10, and Fa0/15.

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16

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What is a result of improperly implementing a network with redundancy at Layer 2?
an increase of unicast and multicast errors at Layer 3
a decrease in the amount of broadcast traffic
end device malfunction because of broadcast storms
an increase in throughput at all points in the network

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17

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A network technician is evaluating the desirable features of both access and distribution layer switches. Which two features are common to switches at these two layers? (Choose two.)
QoS
PoE
port security
link aggregation
application based filtering

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18

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Refer to the exhibit. Which three options correctly identify information that could be associated with this output?(Choose three.)
Interface FastEthernet3/0/0 is subinterfaced.
A non-proprietary trunking protocol is in use.
The configuration is appropriate for a router-on-a-stick network design.
A shutdown command has been applied to interface FastEthernet3/0/0.
Interface FastEthernet3/0/0.3 is mapped to the default management VLAN.
An IP address should be applied to FastEthernet3/0/0 for correct data routing.

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19

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Which type of traffic can still be received on a switch interface that is in STP blocking mode?
BPDU frames
multicast frames
broadcast frames
Layer 3 packets

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20

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Why is MAC address filtering considered a poor choice in securing a WLAN?
Available bandwidth is reduced.
MAC addresses are easily spoofed.
APs are more susceptible to DoS attacks.
The payload encryption is easily broken.

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21

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What will be the effect of the command S1# copy system:running-config tftp://172.16.2.155/tokyo-config?
The IOS will be copied to the TFTP server.
The configuration file named tokyo-config will overwrite the startup configuration file on S1.
The running configuration file on S1 will be saved via TFTP to a file named tokyo-config.
The contents of NVRAM on S1 will become the startup configuration file on the tokyo switch.

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22

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Which statement accurately describes a switch with all access ports assigned to the same VLAN?
All users are in the same broadcast domain.
A router is required for communication between the users.
Bandwidth is utilized more efficiently, resulting in a reduction in costs.
Performance is increased by keeping all users in the same Layer 2 network.

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23

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Which STP port type can only appear once on a segment, and must be present in order for traffic to flow on that segment?
non-root port
disabled port
designated port
non-designated port

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24

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Refer to the exhibit. An administrator documented the output of a CAM table from an Ethernet switch as shown. What action will the switch take when it receives the frame shown at the bottom of the exhibit?
discard the frame
forward the frame out port 2
forward the frame out port 3
forward the frame out all ports
forward the frame out all ports except port 3
add station 00-00-3D-1F-11-05 to port 2 in the forwarding table

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25

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A network technician notes that ports Fa0/9 through Fa0/12 on a switch have been assigned to VLAN 40. VLAN 40, however, was improperly named and the technician deletes it. What happens to the ports that were assigned to VLAN 40?
All ports will automatically become members of VLAN 1.
The ports will automatically become members of the native VLAN.
All VLAN 40 member ports will be unable to communicate with any other stations.
All ports will remain assigned to VLAN 40 because it cannot be deleted if any ports are currently assigned to it.

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26

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What is an efficient and cost effective way to minimize the frequency and effects of broadcast storms on an Ethernet LAN?
Connect each PC directly to a router port.
Use access control lists to filter broadcasts from the network.
Divide the computers into separate VLANs on the existing switches.
Divide the computers into separate workgroups using different physical switches.

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27

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Refer to the exhibit. The hosts connected to switch SW1 are not able to communicate with the hosts in the same VLANs connected to switch SW2. What should be done to fix the problem?
Configure VLANs with different VLAN IDs on switch SW2.
Reconfigure the trunk port on switch SW2 with static trunk configuration.
Introduce a Layer 3 device or a switch with Layer 3 capability in the topology.
Apply IP addresses that are in the same subnet to the interfaces used to connect SW1 and SW2.

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28

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Refer to the exhibit. Based on the output that is shown, which switch is designated as the root bridge in the network?
SW1
SW2
SW3
SW4

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29

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Which three statements are correct concerning the default configuration of a new switch? (Choose three.)
It is configured in VTP server mode.
STP is automatically enabled.
The first VTY line is automatically configured to allow remote connections.
VLAN1 is configured with a management IP address.
All switch ports are assigned to VLAN1.
The enable password is configured as cisco.

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30

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Refer to the exhibit. What can be determined from the configuration of this wireless device?
This configuration is commonly found in an ad hoc network.
All wireless devices that are connected to this access point must have the SSID of Academy.
Any wireless clients that are attached to this access point would have the same IP address and SSID.
Any wireless clients that are attached to this access point must be connected using the 802.11n WAN protocol.

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31

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Refer to the exhibit. Users A and B are reporting intermittent connectivity problems. Pre-installation surveys showed strong signal strength from the AP locations to the client locations. Outside electrical interference has been eliminated. What will fix the problem?
Relocate the APs closer to each other.
Increase the distance between the clients.
Change the channel on AP-B to 6 or 11.
Place AP-A and AP-B on the same wireless channel.

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32

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Refer to the exhibit. Assuming the bridge priority values are set to default on all switches, which switch will be elected as the root bridge of the spanning tree topology?
Cat-A
Cat-B
Cat-C
Cat-D

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33

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Why is it advisable that a network administrator use SSH instead of Telnet when managing switches?
SSH uses TCP whereas Telnet does not.
SSH encrypts only the username and password when logging in.
SSH encrypts all remote management communications whereas Telnet does not.
SSH sends a clear text message steam which reduces the bandwidth use for management.

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34

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Refer to the exhibit. Which two statements are true about the operation of the interfaces? (Choose two.)
Incoming traffic with VLAN ID 0 is processed by interface fa0/0.
Incoming traffic that has a VLAN ID of 2 is processed by subinterface fa0/0.2.
Both subinterfaces remain up with line protocol up, even if fa0/0 line protocol is down.
Subinterfaces use unique MAC addresses by adding the 802.1Q VLAN ID to the hardware address.
Traffic inbound on this router is processed by different subinterfaces, depending on the VLAN from which the traffic originated.

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35

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Refer to the exhibit. After entering the commands in the exhibit, the administrator receives a “password required, but none set” message when attempting to connect to S1. What is the problem?
The enable secret password was not set.
S1 does not have login configured on the vty lines.
S1 does not have a password configured for the vty lines.
The crypto key is not properly configured to generate passwords.
The VLAN1 interface has not be enabled with the no shutdown command.

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36

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While configuring a new switch, a network administrator configures the switch as an HTTP server. What benefits does this configuration provide?
This allows the switch to host web pages for the network.
This allows remote VPN connections to the switch over the Internet.
This is required if a web server or web farm is attached to the switch.
This allows web-based configuration tools to be used with the switch.

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37

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Refer to the exhibit. A new host needs to be connected to VLAN 1. Which IP address should be assigned to this new host?
192.168.1.11 /28
192.168.1.22 /28
192.168.1.33 /28
192.168.1.44 /28
192.168.1.55 /28

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38

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Why is it important that the network administrator consider the spanning-tree network diameter when choosing the root bridge?
The network diameter limitation is 9.
BPDUs may be discarded because of expiring timers.
The cabling distance between the switches is 100 meters.
The network diameter must be set to the number of meters of the cable between the root bridge and its farthest connected switch.

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39

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Refer to the exhibit. What is the effect of setting the security mode to WEP on the Linksys integrated router?
WEP identifies the wireless LAN.
WEP allows the access point to inform clients of its presence.
WEP translates IP addresses into easy-to-remember domain names.
WEP encrypts data between the wireless client and the access point.
WEP translates an internal address or group of addresses into an outside, public address.

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40

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Which set of configuration commands is needed to allow a host in VLAN 100 to manage switch SW1?

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41

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Refer to the exhibit. SW-T has been configured with a single trunking interface. Which VLANs will be allowed across the trunk?
Only VLAN 1 will be allowed across the trunk.
All configured VLANs will be allowed across the trunk.
Only the native VLAN will be allowed across the trunk.
Only the the management and native VLANs will be allowed across the trunk.
Only VLANs that are configured on the VTP server in the domain will be allowed across the trunk.

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42

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Which parameter is used to uniquely identify one wireless network from another?
SSID
OFDM
WEP
DSSS

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43

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What would the bridge ID be for VLAN20 if the priority is manually set to 4096?
4096
4106
4116
32768
32788

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44

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What is the purpose of VLAN trunking?
It improves network performance by reducing broadcast traffic.
It selects the best path to transmit data in a switched network.
It carries the traffic of multiple VLANs through a single link.
It avoids spanning tree loops in a switched network.

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45

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What provides an authentication mechanism for 802.11-based wireless networks?
DSSS
OFDM
SSID
WPA

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46

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Refer to the exhibit. What can be determined from the exhibited output?
Interface Gi0/1 is an access port.
Interface Fa0/1 is not currently active.
The entry for VLAN 901 will not age out.
Address 001c.b05a.5380 was manually added.

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47

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Refer to the exhibit. Hosts A and B, connected to hub HB1, attempt to transmit a frame at the same time but a collision occurs. Which hosts will receive the collision jamming signal?
only hosts A and B
only hosts A, B, and C
only hosts A, B, C, and D
only hosts A, B, C, and E

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48

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What identifier in the BPDU creates a unique BID for a switch?
IP address
MAC address
bridge priority
VLAN ID
port priority

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49

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Refer to the exhibit. Switch SW2 was tested in a lab environment and then inserted into a production network without reloading its configuration. After the trunk link between SW1 and SW2 was brought up, all users lost connectivity to the network. What could be the source of the problem?
All the VLANs were pruned from the trunk port between SW1 and SW2.
SW1 and SW2 cannot be both set as VTP servers in the same VTP domain.
VTP configuration revision number of SW2 was higher than the configuration revision number of SW1.
The additional VLANs from SW2 created more VLANs than the VLAN database of SW1 could contain.

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50

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Refer to the exhibit. Router R1 is properly configured for router on a stick inter-VLAN routing, but PC1 is unable to ping PC2. What needs to be done to resolve the problem?
Rename VLAN1.
Connect one more port of S1 to R1.
Configure the Fa0/1 port of S1 as a trunk port.
Move the Fa0/0 interface of R1 to another VLAN.

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51

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In which mode is a VTP switch operating if it does not allow for the creation of local VLANs but it does accept VLAN updates from other switches in the same domain?
client
root
server
transparent

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52

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Refer to the exhibit. A network administrator needs to add IP phones to the network. To which devices should the IP phones connect?
AS1 and AS2
DS1 and DS2
DS1, DS2, and CS1
AS1, AS2, DS1, and DS2

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