CCNA Study Set 1

In which way does a spine and-leaf architecture allow for scalability in a network when additional access ports are required?

A leaf switch can be added with connections to every spine switch

An engineer must configure a WLAN using the strongest encryption type for WPA2-PSK. Which cipher fulfills the configuration requirement?

AES

Which type of wireless encryption is used for WPA2 in pre-shared key mode?

AES-256

When configuring a WLAN with WPA2 PSK in the Cisco Wireless LAN Controller GUI, which two formats are available to select? (Choose two)

ASCII hexadecimal

Which statement about the Cisco ACI fabric is most accurate?

An APIC is a cluster of at least three APIC controllers, providing a single point of management without a single point of failure.

In a CDP environment, what happens when the CDP interface on an adjacent device is configured without an IP address?

CDP operates normally, but it cannot provide IP address information for that neighbor.

Which feature on the Cisco Wireless LAN Controller when enabled restricts management access from specific networks?

CPU ACL

A frame that enters a switch fails the Frame Check Sequence. Which two interface counters are incremented? (Choose two)

CRC input errors

Which two statements about the purpose of the OSI model are accurate? (Choose two)

Defines the network functions that occur at each layer Facilitates an understanding of how information travels throughout a network

Which IPv6 address block sends packets to a group address rather than a single address?

FF00::/8

When configuring IPv6 on an interface, which two IPv6 multicast groups are joined? (Choose two)

FF02::1 FF02::2

Which action is taken by a switch port enabled for PoE power classification override?

If a monitored port exceeds the maximum administrative value for power, the port is shutdown and err-disabled

What is a benefit of using a Cisco Wireless LAN Controller?

It eliminates the need to configure each access point individually

What are two characteristics of a controller-based network? (Choose two)

It uses northbound and southbound APIs to communicate between architectural layers It moves the control plane to a central point

What are two southbound APIs? (Choose two)

NETCONF Open Flow

Which statement about Link Aggregation when implemented on a Cisco Wireless LAN Controller is true?

One functional physical port is needed to pass client traffic

Which statement correctly compares traditional networks and controller-based networks?

Only controller-based networks decouple the control plane and the data plane

Which QoS Profile is selected in the GUI when configuring a voice over WLAN deployment?

Platinum

Which two values or settings must be entered when configuring a new WLAN in the Cisco Wireless LAN Controller GUI? (Choose two)

SSID Profile name

What is the default behavior of a Layer 2 switch when a frame with an unknown destination MAC address is received?

The Layer 2 switch floods packets to all ports except the receiving port in the given VLAN

Which design element is a best practice when deploying an 802.11b wireless infrastructure?

allocating non overlapping channels to access points that are in close physical proximity to one another

What is the destination MAC address of a broadcast frame?

ff:ff:ff:ff:ff:ff

Which unified access point mode continues to serve wireless clients after losing connectivity to the Cisco Wireless LAN Controller?

flex connect

Which command automatically generates an IPv6 address from a specified IPv6 prefix and MAC address of an interface?

ipv6 address autoconfig

Which command is used to configure an IPv6 static default route?

ipv6 route ::/0 interface next-hop

Which mode allows access points to be managed by Cisco Wireless LAN Controllers?

lightweight

Which command should you enter to configure an LLDP delay time of 5 seconds?

lldp reinit 5

Which command is used to enable LLDP globally on a Cisco IOS ISR?

lldp run

Which 802.11 frame type is association response?

management

Refer to the exhibit. Which command provides this output? Capability Codes: k - Router, I - Trans Bridge, B - source Route bridge S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone, D - Remote, C - CVTA, M - Two-port Mac Relay Device ID Local Intrfce Holdtme Capability Platform Port ID 10.1.1.2 Gig37/3 176 RI CPT 600 Gig36/41 10.1.1.2 Gig37/1 174 RI CPT 600 Gig36/43 10.1.1.2 Gig36/41 134 RI CPT 600 Gig37/3 10.1.1.2 Gig36/43 134 RI CPT 600 Gig37/1 10.1.1.2 Ten3/2 132 RI CPT 600 Ten4/2 10.1.1.2 Ten4/2 174 RI CPT 600 Ten3/2

show cdp neighbor

Which command verifies whether any IPv6 ACLs are configured on a router?

show ipv6 access-list

Which API is used in controller-based architectures to interact with edge devices?

southbound

How can the Cisco Discovery Protocol be used?

to allow a switch to discover the devices that are connected to its ports to determine the hardware platform of the device to determine the IP addresses of connected Cisco devices

Which IPv6 address type provides communication between subnets and cannot route on the Internet?

unique local

What are two reasons that cause late collisions to increment on an Ethernet interface? (Choose two)

when the cable length limits are exceeded when one side of the connection is configured for half-duplex