What are two reasons a network administrator would segment a network with a Layer 2 switch? (Choose two.)

to isolate traffic between segments

to create fewer collision domains

to isolate ARP request messages from the rest of the network

What command will enable a router to begin sending messages that allow it to configure a link-local address without using an IPv6 DHCP server?

the ipv6 unicast-routing command

A network administrator is using the router-on-a-stick model to configure a switch and a router for inter-VLAN routing. What configuration should be made on the switch port that connects to the router?

Configure the port as an 802.1q trunk port.

Configure it as a trunk port and allow only untagged traffic.

Configure the port as an access port and a member of VLAN1.

Configure the port as a trunk port and assign it to VLAN1.

What are three techniques for mitigating VLAN attacks? (Choose three.)

Set the native VLAN to an unused VLAN.

In which situation would a technician use the show interfaces switch command?

when packets are being dropped from a particular directly attached host

to determine if remote access is enabled

when an end device can reach local devices, but not remote devices

to determine the MAC address of a directly attached network device on a particular interface

What is a drawback of the local database method of securing device access that can be solved by using AAA with centralized servers?

User accounts must be configured locally on each device, which is an unscalable authentication solution.

There is no ability to provide accountability.

It is very susceptible to brute-force attacks because there is no username.

The passwords can only be stored in plain text in the running configuration.

What action does a DHCPv4 client take if it receives more than one DHCPOFFER from multiple DHCP servers?

It sends a DHCPREQUEST that identifies which lease offer the client is accepting.

It sends a DHCPNAK and begins the DHCP process over again.

It discards both offers and sends a new DHCPDISCOVER.

It accepts both DHCPOFFER messages and sends a DHCPACK.

Refer to the exhibit. The network administrator is configuring the port security feature on switch SWC. The administrator issued the command show port-security interface fa 0/2 to verify the configuration. What can be concluded from the output that is shown? (Choose three.)

Security violations will cause this port to shut down immediately.

The switch port mode for this interface is access mode.

Three security violations have been detected on this interface.

There is no device currently connected to this port.

A network administrator has found a user sending a double-tagged 802.1Q frame to a switch. What is the best solution to prevent this type of attack?

The VLANs for user access ports should be different VLANs than any native VLANs used on trunk ports.

The native VLAN number used on any trunk should be one of the active data VLANs.

Trunk ports should be configured with port security.

Trunk ports should use the default VLAN as the native VLAN number.

Refer to the exhibit. Which two conclusions can be drawn from the output? (Choose two.)

The load-balancing method used is source port to destination port.

The bundle is fully operational.

The port channel is a Layer 3 channel.

Refer to the exhibit. A network engineer is configuring IPv6 routing on the network. Which command issued on router HQ will configure a default route to the Internet to forward packets to an IPv6 destination network that is not listed in the routing table?

ip route 0.0.0.0 0.0.0.0 serial 0/1/1

Users are complaining of sporadic access to the internet every afternoon. What should be done or checked?

Check the statistics on the default route for oversaturation.

Create static routes to all internal networks and a default route to the internet.

Verify that there is not a default route in any of the edge router routing tables.

Create a floating static route to that network.

What action takes place when the source MAC address of a frame entering a switch appears in the MAC address table associated with a different port?

The switch replaces the old entry and uses the more current port.

The switch purges the entire MAC address table.

The switch updates the refresh timer for the entry.

The switch forwards the frame out of the specified port.

A network administrator is configuring a WLAN. Why would the administrator use a WLAN controller?

to facilitate group configuration and management of multiple WLANs through a WLC

to centralize management of multiple WLANs

to provide privacy and integrity to wireless traffic by using encryption

to provide prioritized service for time-sensitive applications

Which three statements accurately describe duplex and speed settings on Cisco 2960 switches? (Choose three.)

An autonegotiation failure can result in connectivity issues.

When the speed is set to 1000 Mb/s, the switch ports will operate in full-duplex mode.

The duplex and speed settings of each switch port can be manually configured.

Enabling autonegotiation on a hub will prevent mismatched port speeds when connecting the hub to the switch.

By default, the speed is set to 100 Mb/s and the duplex mode is set to autonegotiation.

Refer to the exhibit. A network administrator configures R1 for inter-VLAN routing between VLAN 10 and VLAN 20. However, the devices in VLAN 10 and VLAN 20 cannot communicate. Based on the configuration in the exhibit, what is a possible cause for the problem?

B. The encapsulation is misconfigured on a subinterface.

The port Gi0/0 should be configured as trunk port.

A no shutdown command should be added in each subinterface configuration.

The command interface gigabitEthernet 0/0.1 is wrong.

A network administrator uses the spanning-tree portfast bpduguard default global configuration command to enable BPDU guard on a switch. However, BPDU guard is not activated on all access ports. What is the cause of the issue?

PortFast is not configured on all access ports.

BPDU guard needs to be activated in the interface configuration command mode.

Access ports configured with root guard cannot be configured with BPDU guard.

Access ports belong to different VLANs.

A WLAN engineer deploys a WLC and five wireless APs using the CAPWAP protocol with the DTLS feature to secure the control plane of the network devices. While testing the wireless network, the WLAN engineer notices that data traffic is being exchanged between the WLC and the APs in plain-text and is not being encrypted. What is the most likely reason for this?

Although DTLS is enabled by default to secure the CAPWAP control channel, it is disabled by default for the data channel.

DTLS only provides data security through authentication and does not provide encryption for data moving between a wireless LAN controller (WLC) and an access point (AP).

DTLS is a protocol that only provides security between the access point (AP) and the wireless client.

Data encryption requires a DTLS license to be installed on each access point (AP) prior to being enabled on the wireless LAN controller (WLC).

A new switch is to be added to an existing network in a remote office. The network administrator does not want the technicians in the remote office to be able to add new VLANs to the switch, but the switch should receive VLAN updates from the VTP domain. Which two steps must be performed to configure VTP on the new switch to meet these conditions? (Choose two.)

Configure the new switch as a VTP client.

Configure the existing VTP domain name on the new switch.

Configure an IP address on the new switch.

Configure all ports of both switches to access mode.

Refer to the exhibit. Consider that the main power has just been restored. PC3 issues a broadcast IPv4 DHCP request. To which port will SW1 forward this request?

to Fa0/1, Fa0/2, and Fa0/3 only

to Fa0/1, Fa0/2, Fa0/3, and Fa0/4

to Fa0/1, Fa0/2, and Fa0/4 only

What action takes place when the source MAC address of a frame entering a switch is not in the MAC address table?

The switch adds the MAC address and incoming port number to the table.

The switch adds a MAC address table entry for the destination MAC address and the egress port.

The switch replaces the old entry and uses the more current port.

The switch updates the refresh timer for the entry.

Employees are unable to connect to servers on one of the internal networks. What should be done or checked?

Use the “show ip interface brief” command to see if an interface is down.

Verify that there is not a default route in any of the edge router routing tables.

Create static routes to all internal networks and a default route to the internet.

Check the statistics on the default route for oversaturation.

What is the effect of entering the ip dhcp snooping configuration command on a switch?

It enables DHCP snooping globally on a switch.

It manually enables a trunk link.

It disables DTP negotiations on trunking ports.

It enables PortFast globally on a switch.

An administrator notices that large numbers of packets are being dropped on one of the branch routers. What should be done or checked?

Check the routing table for a missing static route.

Create static routes to all internal networks and a default route to the internet.

Create extra static routes to the same location with an AD of 1.

Check the statistics on the default route for oversaturation.

What are two switch characteristics that could help alleviate network congestion? (Choose two.)

frame check sequence (FCS) check

What is a result of connecting two or more switches together?

The size of the broadcast domain is increased.

The number of broadcast domains is increased.

The number of collision domains is reduced.

The size of the collision domain is increased.

Branch users were able to access a site in the morning but have had no connectivity with the site since lunch time. What should be done or checked?

Use the “show ip interface brief” command to see if an interface is down.

Verify that the static route to the server is present in the routing table.

Check the configuration on the floating static route and adjust the AD.

Create a floating static route to that network.

What is the effect of entering the switchport port-security configuration command on a switch?

It enables port security on an interface.

It dynamically learns the L2 address and copies it to the running configuration.

It enables port security globally on the switch.

It restricts the number of discovery messages, per second, to be received on the interface.

A network administrator is configuring a WLAN. Why would the administrator use multiple lightweight APs?

to facilitate group configuration and management of multiple WLANs through a WLC

to centralize management of multiple WLANs

to monitor the operation of the wireless network

to provide prioritized service for time-sensitive applications

Refer to the exhibit. PC-A and PC-B are both in VLAN 60. PC-A is unable to communicate with PC-B. What is the problem?

The VLAN that is used by PC-A is not in the list of allowed VLANs on the trunk.

The native VLAN should be VLAN 60.

The trunk has been configured with the switchport nonegotiate command.

The native VLAN is being pruned from the link.

A network administrator is configuring a WLAN. Why would the administrator use RADIUS servers on the network?

to restrict access to the WLAN by authorized, authenticated users only

to monitor the operation of the wireless network

to facilitate group configuration and management of multiple WLANs through a WLC

to centralize management of multiple WLANs

What is the effect of entering the switchport mode access configuration command on a switch?

It disables DTP on a non-trunking interface.

It manually enables a trunk link.

It enables BPDU guard on a specific port.

A network administrator has configured a router for stateless DHCPv6 operation. However, users report that workstations are not receiving DNS server information. Which two router configuration lines should be verified to ensure that stateless DHCPv6 service is properly configured? (Choose two.)

The dns-server line is included in the ipv6 dhcp pool section.

The ipv6 nd other-config-flag is entered for the interface that faces the LAN segment.

The domain-name line is included in the ipv6 dhcp pool section.

The address prefix line is included in the ipv6 dhcp pool section.

The ipv6 nd managed-config-flag is entered for the interface that faces the LAN segment.

A network administrator is configuring a WLAN. Why would the administrator disable the broadcast feature for the SSID?

to eliminate outsiders scanning for available SSIDs in the area

to centralize management of multiple WLANs

to facilitate group configuration and management of multiple WLANs through a WLC

to provide prioritized service for time-sensitive applications

Refer to the exhibit. An administrator is attempting to install an IPv6 static route on router R1 to reach the network attached to router R2. After the static route command is entered, connectivity to the network is still failing. What error has been made in the static route configuration?

The network prefix is incorrect.

The next hop address is incorrect.

The destination network is incorrect.

What action takes place when a frame entering a switch has a unicast destination MAC address that is not in the MAC address table?

The switch will forward the frame out all ports except the incoming port.

The switch updates the refresh timer for the entry.

The switch resets the refresh timer on all MAC address table entries.

The switch replaces the old entry and uses the more current port.

A junior technician was adding a route to a LAN router. A traceroute to a device on the new network revealed a wrong path and unreachable status. What should be done or checked?

Check the configuration of the exit interface on the new static route.

Create a floating static route to that network.

Check the configuration on the floating static route and adjust the AD.

Verify that the static route to the server is present in the routing table.

What is the effect of entering the ip arp inspection vlan 10 configuration command on a switch?

It enables DAI on specific switch interfaces previously configured with DHCP snooping.

It specifies the maximum number of L2 addresses allowed on a port.

It enables DHCP snooping globally on a switch.

It globally enables BPDU guard on all PortFast-enabled ports.

CCNA 2 2

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Refer to the exhibit. A network administrator is verifying the configuration of inter-VLAN routing. Users complain that PC2 cannot communicate with PC1. Based on the output, what is the possible cause of the problem?

Gi0/0 is not configured as a trunk port.

The command interface GigabitEthernet0/0.5 was entered incorrectly.

There is no IP address configured on the interface Gi0/0.

The no shutdown command is not entered on subinterfaces.

The encapsulation dot1Q 5 command contains the wrong VLAN.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Refer to the exhibit. A network administrator is configuring inter-VLAN routing on a network. For now, only one VLAN is being used, but more will be added soon. What is the missing parameter that is shown as the highlighted question mark in the graphic?

It identifies the subinterface.

It identifies the VLAN number.

It identifies the native VLAN number.

It identifies the type of encapsulation that is used.

It identifies the number of hosts that are allowed on the interface.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What network attack seeks to create a DoS for clients by preventing them from being able to obtain a DHCP lease?

IP address spoofing

DHCP starvation

CAM table attack

DHCP spoofing

Answer explanation

Explanation: DCHP starvation attacks are launched by an attacker with the intent to create a DoS for DHCP clients. To accomplish this goal, the attacker uses a tool that sends many DHCPDISCOVER messages in order to lease the entire pool of available IP addresses, thus denying them to legitimate hosts.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Refer to the exhibit. If the IP addresses of the default gateway router and the DNS server are correct, what is the configuration problem?

The DNS server and the default gateway router should be in the same subnet.

The IP address of the default gateway router is not contained in the excluded address list.

The default-router and dns-server commands need to be configured with subnet masks.

The IP address of the DNS server is not contained in the excluded address list.

Answer explanation

Explanation: In this configuration, the excluded address list should include the address that is assigned to the default gateway router. So the command should be ip dhcp excluded-address 192.168.10.1 192.168.10.9.

MULTIPLE SELECT QUESTION

1 min • 2 pts

Refer to the exhibit. A network administrator has added a new subnet to the network and needs hosts on that subnet to receive IPv4 addresses from the DHCPv4 server.
What two commands will allow hosts on the new subnet to receive addresses from the DHCP4 server? (Choose two.)

R1(config-if)# ip helper-address 10.1.0.254

R2(config-if)# ip helper-address 10.2.0.250

R1(config-if)# ip helper-address 10.2.0.250

R1(config)# interface G0/1

R1(config)# interface G0/0

Answer explanation

Explanation: You need the router interface that is connected to the new subnet and the dhcp server address.
The ip helper-address command is used to configure a router to be a DHCPv4 relay. The command should be placed on the interface facing the DHCPv4 clients. When the command is applied on the router interface, the interface will receive DHCPv4 broadcast messages and forward them as unicast to the IP address of the DHCPv4 server.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What protocol or technology uses source IP to destination IP as a load-balancing mechanism?

EtherChannel

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What protocol should be disabled to help mitigate VLAN attacks?

DTP

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CCNA 2 2

Refer to the exhibit. A network administrator is verifying the configuration of inter-VLAN routing. Users complain that PC2 cannot communicate with PC1. Based on the output, what is the possible cause of the problem?

Refer to the exhibit. A network administrator is configuring inter-VLAN routing on a network. For now, only one VLAN is being used, but more will be added soon. What is the missing parameter that is shown as the highlighted question mark in the graphic?

What network attack seeks to create a DoS for clients by preventing them from being able to obtain a DHCP lease?

Refer to the exhibit. If the IP addresses of the default gateway router and the DNS server are correct, what is the configuration problem?

Explanation: In this configuration, the excluded address list should include the address that is assigned to the default gateway router. So the command should be ip dhcp excluded-address 192.168.10.1 192.168.10.9.

Refer to the exhibit. A network administrator has added a new subnet to the network and needs hosts on that subnet to receive IPv4 addresses from the DHCPv4 server.
What two commands will allow hosts on the new subnet to receive addresses from the DHCP4 server? (Choose two.)

What protocol or technology uses source IP to destination IP as a load-balancing mechanism?

What protocol should be disabled to help mitigate VLAN attacks?

What protocol or technology requires switches to be in server mode or client mode?

What are two reasons a network administrator would segment a network with a Layer 2 switch? (Choose two.)

Explanation: A switch has the ability of creating temporary point-to-point connections between the directly-attached transmitting and receiving network devices. The two devices have full-bandwidth full-duplex connectivity during the transmission.

What command will enable a router to begin sending messages that allow it to configure a link-local address without using an IPv6 DHCP server?

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CCNA 2 2

Refer to the exhibit. A network administrator is verifying the configuration of inter-VLAN routing. Users complain that PC2 cannot communicate with PC1. Based on the output, what is the possible cause of the problem?

Refer to the exhibit. A network administrator is configuring inter-VLAN routing on a network. For now, only one VLAN is being used, but more will be added soon. What is the missing parameter that is shown as the highlighted question mark in the graphic?

What network attack seeks to create a DoS for clients by preventing them from being able to obtain a DHCP lease?

Refer to the exhibit. If the IP addresses of the default gateway router and the DNS server are correct, what is the configuration problem?

Explanation: In this configuration, the excluded address list should include the address that is assigned to the default gateway router. So the command should be ip dhcp excluded-address 192.168.10.1 192.168.10.9.

Refer to the exhibit. A network administrator has added a new subnet to the network and needs hosts on that subnet to receive IPv4 addresses from the DHCPv4 server.What two commands will allow hosts on the new subnet to receive addresses from the DHCP4 server? (Choose two.)

What protocol or technology uses source IP to destination IP as a load-balancing mechanism?

What protocol should be disabled to help mitigate VLAN attacks?

What protocol or technology requires switches to be in server mode or client mode?

What are two reasons a network administrator would segment a network with a Layer 2 switch? (Choose two.)

Explanation: A switch has the ability of creating temporary point-to-point connections between the directly-attached transmitting and receiving network devices. The two devices have full-bandwidth full-duplex connectivity during the transmission.

What command will enable a router to begin sending messages that allow it to configure a link-local address without using an IPv6 DHCP server?

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Refer to the exhibit. A network administrator has added a new subnet to the network and needs hosts on that subnet to receive IPv4 addresses from the DHCPv4 server.
What two commands will allow hosts on the new subnet to receive addresses from the DHCP4 server? (Choose two.)