The last quiz 120-173

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

• to centralize management of multiple WLANs

• to provide privacy and integrity to wireless traffic by using encryption

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

• 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.

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

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

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?

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

• B. The encapsulation is misconfigured on a subinterface.

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

• D. 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?

• 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.

• PortFast is not configured on all access ports.

Which two types of spanning tree protocols can cause suboptimal traffic flows because they assume only one spanning-tree instance for the entire bridged network? (Choose two.)

• MSTP

• RSTP

• PVST+

• STP

Refer to the exhibit. A network administrator is configuring the router R1 for IPv6 address assignment. Based on the partial configuration, which IPv6 global unicast address assignment scheme does the administrator intend to implement?

• stateful

• stateless

• manual configuration

• SLAAC

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?

• 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).

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

• 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​

• to Fa0/1 and Fa0/2 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 a MAC address table entry for the destination MAC address and the egress port.

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

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

• The switch updates the refresh timer for the entry.