Cisco CCNA03 questions

Here are some questions and I have answered them.


Refer to the exhibit. Computer D sends a broadcast message. Which devices will process the broadcast message?
Computer B, computer E, and Router1


Which two statements about a service set identifier (SSID) are true? (Choose two.)
tells a wireless device to which WLAN it belongs
all wireless devices on the same WLAN must have the same SSID


Refer to the graphic. In the Wireless menu option of a Linksys integrated router, what does the Network Mode option Mixed mean?
The router supports 802.11b, 802.11g, and 802.11n devices.


Refer to the exhibit. Hosts that are connected to switch SW1 are not able to communicate with hosts in the same VLAN that are connected to switch SW2. What should be done to fix the problem?
Reconfigure the fa0/1 interface on switch SW1 with a static trunk configuration.


Refer to the exhibit. A network administrator has segmented the network into two VLANs and configured R1 and S1 as displayed. However, PC1 is unable to access PC2. What is the likely problem?
The Fa0/1 port of S1 is not a trunk port.


What VLANs are allowed across a trunk when the range of allowed VLANs is set to the default value?
all VLANs

What is the purpose of the switch command switchport access vlan 99?
to assign the port to a particular VLAN

Refer to the exhibit. The network administrator wants to allow both SSH and Telnet connections to Switch1.
However, the SSH connections fail. What is the most likely cause of this problem? 
The transport input command is applied incorrectly.

Refer to the exhibit. Switch SW2 has been newly purchased and added to the network. What configuration should be applied to SW2 so that it participates in the same VTP domain as switch SW1, receives VLAN information from SW1, and synchronizes VLAN information?
Configure SW2 with the VTP domain password

Which two statements describe Spanning Tree Protocol? (Choose two.)
It is only used at Layer 2.
It eliminates Layer 2 loops in network topologies.

Refer to the exhibit. SW1 has recently been installed to replace a hub. Hosts 1 and 4 both transmit data at the same time. How will this event be handled by the network devices? (Choose two.)
Because hosts 1 and 4 connect to a switch, no collision will occur.
Based on information that is found in the switch MAC address table, the switch will forward the data to the appropriate ports.

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?
Change the channel on AP-B to 6 or 11.

Refer to the exhibit. All switches are configured with the default bridge priority. Which port will act as a non-designated port if all links are operating at the same bandwidth?
Fa0/1 interface of switch A

Refer to the exhibit. After the listed commands are entered into router R1 and switch S1, PC1 and PC2 cannot ping each other. The network administrator enters the show interfaces trunk command and gets the results that are shown. What is the likely problem?
The trunk has not been established because the switch port has not been configured for trunking.

Refer to the exhibit. What does STATIC indicate in the output that is shown?
VLAN 99 was manually added to the VLAN database.


Refer to the exhibit. What does “LEARNING” mean as it relates to the Spanning Tree Protocol?
The switch is receiving BPDUs and populating the MAC address table, but not sending data

What is the purpose of the Spanning Tree algorithm?
It prevents loops in a switched network with redundant paths.

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?
forward the frame out all ports except port 3

Which parameter is associated with wireless authentication?
Shared key

Refer to the exhibit. Router RA receives a packet with a source address of 192.168.1.65 and a destination address of 192.168.1.85. What will the router do with this packet?
The router will ignore the packet.

Refer to the exhibit. The switches are configured for VTP as shown. Which two statements correctly describe the operation of these switches? (Choose two.)
An existing VLAN can be deleted from Switch4 and that VLAN will be deleted from Switch1 and Switch2
An existing VLAN can be deleted from Switch2 and that VLAN will be deleted from Switch1 and Switch4.

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

Refer to the exhibit. A new host needs to be connected to VLAN 20. Which IP address should be assigned to this new host?
172.16.30.146 /27


This switch is to be added to the production network which two facts about vlans and vtp operation can be confirmed by this output. (Choose two.)
All VLANs that are configured on this switch will be sent to all other switches in the same VTP domain.
Adding this switch to the network will cause no disruption in the VTP domain operations if the rest of the switches in the same
domain have a higher configuration revision number.

Refer to the exhibit. What is the result of issuing these commands?
The password will be set for the first Telnet connection.

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

Refer to the exhibit. Router R1 is connected to a switch through a trunk. What two ways are indicative of how the router handles incoming VLAN traffic? (Choose two.)
Incoming traffic that has a VLAN ID of 10 is processed by subinterface Fa0/0.1
Traffic inbound on this router is processed by different subinterfaces depending on the VLAN from which the traffic originated

Refer to the exhibit. Which password allows the administrator to enter the privileged exec mode?
cisco2

Which security protocol or measure would provide the greatest protection for a wireless LAN?
WPA2

Refer to the exhibit. All trunk links are operational and all VLANs are allowed on all trunk links. An ARP request is sent by computer 5. Which device or devices will receive this message?
computer 3 and RTR-A


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, B, and C

Refer to the exhibit. Router RA receives a packet with a source address of 192.168.1.65 and a destination address of 192.168.1.161. What will the router do with this packet?
The router will forward the packet out interface FastEthernet 0/1.3.

Refer to the exhibit. Which two settings show the default value of VTP configuration on a Cisco 2960 switch? (Choose two.)
revision number
pruning mode

Which value determines if a switch becomes the central point of reference in the spanning tree topology?
lowest bridge ID

What are two benefits of the IEEE 802.11n standard over the IEEE 802.11G?
provides improved range
permits increased data rates

Which configuration changes will increment the configuration revision number on the VTP server?
configuring or deleting a VLAN or creating a VLAN name

Refer to the exhibit. A company has acquired a new office in a campus environment. Switches in the existing office and the new office are directly connected by a trunk link. The VLANs and IP addressing are setup as shown in the exhibit. The computers in each office are not able to ping each other. What will fix the problem?
Connect S2 and S3 to a common router.

What is a possible impact of setting too short an aging time in the MAC address table of a switch?
unnecessary flooding of packets

Refer to the exhibit. The network administrator has just added VLAN 50 to Switch1 and Switch2. Hosts A, B, C, and D are correctly configured with IP addresses in the subnet range for VLAN 50. Host A can communicate with host B, but cannot communicate with host C or host D. What is the cause of this problem?
VLAN 50 is not allowed on the trunk link between Switch1 and Switch2.

Refer to the exhibit. Users complain that they do not have connectivity to the web server that is connected to SW1. What should be done to remedy the problem?
Configure VLAN 100 as the native VLAN for SW1.

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

Using the command copy tftp:backup.cfg startup-config, an administrator downloaded a saved configuration from a TFTP server to a switch. Why does the administrator not detect any changes in the switch configuration after the download completes?
Downloading to the startup-config requires the switch to be reloaded in order for the configuration to take effect.

What two methods can be used to remove MAC address table entries from a switch? (Choose two.)
Power cycle the switch to clear all dynamically learned addresses
The clear mac-address-table command will remove statically and dynamically configured table entries.

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

Which method establishes an administrative connection for configuring the Linksys WRT300N wireless access point?
computer in the same IP subnet as the access point, enter the default IP address of the access point in a web browser.

Refer to the exhibit. All edge ports are configured with the spanning-tree portfast command. Host1 is recently connected to port Fa0/1 on switch SW1 . Which statement is true about the status of port Fa0/1?
The port will transition immediately into forwarding state.

Refer to the exhibit. What is true of the configuration of switch S1?
Switch ports Fa0/1 and Fa0/3 are configured to carry data from multiple VLANs.

Refer to the exhibit. The configuration steps that are listed in the exhibit have been entered in switch S1 via the console. Subsequent attempts to telnet to the switch are not successful. What is causing the problem?
The transport input command must specify Telnet access.

Refer to the exhibit. Which switch will be elected as the root bridge of the spanning tree topology?
Cat-C

Refer to the exhibit. VTP has been configured with VTP pruning enabled on all switches. If HostA sends a broadcast frame to SW1, which devices will receive the frame?
SW1, SW3, HostF

Refer to the exhibit. Which two statements are true about the operation of the interfaces? (Choose two.)
Incoming traffic that has a VLAN ID of 2 is processed by subinterface fa0/0.2.
Traffic inbound on this router is processed by different subinterfaces, depending on the VLAN from which the traffic originated.

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.)
Configure the VTP mode of the switch to transparent.
Configure the switch with the same VTP domain name as other switches in the network.

Refer to the exhibit. The devices in the network are operational and configured as indicated in the exhibit. However, hosts B and D cannot ping each other. What is the most likely cause of this problem?

Hosts B and D are configured with IP addresses from different subnets.
Why is it advisable that a network administrator use SSH instead of Telnet when managing switches?
SSH encrypts all remote management communications whereas Telnet does not.

Refer to the exhibit. The teacher host is connected to port Fa0/7 on switch STW. A student has decided to share access to the Internet by attaching a hub and laptop to STW as shown. What will be the result of the student making this connection?
The frames from the laptop will be dropped, but the teacher host will maintain connectivity with the network.

A network administrator configures a switch port with the command switchport mode dynamic auto. What is the resulting behavior of the switch port?
The switch port is able to trunk if the remote switch port is set to desirable

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

Refer to the exhibit. What would happen if the network administrator moved the network cable of Host A from interface Fa0/1 to Fa0/3 on switch SW1?
Host A is no longer a member of VLAN 10, because port Fa0/3 has been manually assigned to VLAN 30.

Refer to the exhibit. VLAN 10 has been configured on the VTP server. Users who are assigned to VLAN 10 are connected as shown in the exhibit. On the basis of the outputs that are provided, which group of users will be able to communicate with the users on VLAN 10 on SW1?
users on VLAN 10 who are connected only to SW3

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
A shutdown command has been applied to interface FastEthernet3/0/0.

Refer to the exhibit. The Layer 2 switching design that is shown has been implemented in a campus environment that is using Spanning Tree Protocol. All inter-switch links that are shown are trunks. Whenever an inter-switch link fails, the network takes nearly a minute to completely converge. How can the convergence time be reduced?
Implement Rapid Spanning Tree Protocol.


Refer to the exhibit. Switches S2 and S3 are properly connected using an ethernet cable. A network administrator has configured both switches with VTP, but S3 is unable to propagate VLANs to S2. What could be the reason for this?
The VTP domains are different on both switches.

In a three-layer hierarchical network design, which distribution layer function delineates broadcast domains?
routing between VLANs

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

What is one disadvantage that 802.11a wireless has compared to 802.11g?
The use of higher frequencies means that signals are more likely to be obstructed.

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.
All switch ports are assigned to VLAN1.

Refer to the exhibit. How is port Gi1/1 on SWT-A functioning in the spanning-tree topology?
It is receiving BPDUs, but not sending data frames.

While configuring a new switch, a network administrator configures the switch as an HTTP server. What benefits does this configuration provide?
This allows web-based configuration tools to be used with the switch.

Which statement describes the use of voice VLANs in Cisco IP telephony?
The voice VLAN must be configured on the switch port to which the IP phone attaches.

Refer to the exhibit. If switch SW1 is configured with the four VLANs as shown in the exhibit, how many physical interfaces are needed on router R1 to configure inter-VLAN routing using subinterfaces?
one

Refer to the exhibit. What does the term DYNAMIC indicate in the output that is shown?
The switch learned this MAC address from the source address in a frame received on Fa0/18

Refer to the exhibit. How does SW1 manage traffic coming from Host A?
SW1 leaves the traffic untagged and forwards it over the trunk.

An administrator is troubleshooting a PC on the network which is suffering from slow and intermittent connectivity. The PC has a ping success rate to the default gateway of less than half the ping attempts. Other PCs on the switch can consistently ping the default gateway. The switch port is configured for auto duplex and the PC is configured for full duplex. What will commonly cause this problem?
The PC is set to full duplex. The switch port fails to autonegotiate the duplex setting and defaults to half duplex, which causes a duplex mismatch.


Refer to the exhibit. A network administrator has segmented the network into two VLANs and configured Router1 for inter-VLAN routing. A test of the network, however, shows that hosts on each VLAN can only access local resources and not resources on the other VLAN. What is the most likely cause of this problem?
Switch port Fa0/1 is not trunking.

What impact does the use of the mdix auto configuration command have on an Ethernet interface on a switch?
automatically detects copper cable type