【福利】10道CCNA经典测试题你能对几题？（附最新版CCNA题库下载链接）

QUESTION 1

A network engineer must create a diagram of a multivendor network.which command must be configured on the Cisco devices so that the topology of the network can be mapped?

A.Device(config)#lldp run

B.Device(config)#cdp run

C.Device(config)# cdp enable

D.Device(config)# flow-sampler-map topology

QUESTION 2

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

A.CPU ACL

B.TACACS

C.Flex ACL

D.RADIUS

QUESTION 3

When a site-to-site VPN is used, which protocol is responsible for the transport of user data?

A.IKEv2

B.IKEv1

C.IPsec

D.MD5

QUESTION 4

How do TCP and UDP differ in the way that they establish a connection between two endpoints？

A.TCP use the three-way handshake,and UDP dose no guarantee message delivery

B.TCP use synchronization packets,and UDP uses acknowledgement packets

C.UDP provides reliable message transfer,and TCP is a connectionless protocol.

D.UDP use SYN,SYN ACK,and FIN bits in the frame header while TCP uses SYN,SYN ACK,and ACK bis.

QUESTION 5

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

A.when the sending device waits 15 seconds before sending the frame again

B.when the cable length limits are exceeded

C.when one side of the connection is configured for half-duplex

D.when Carner Sense Multiple Access/Collision Detection is used

E.when a collision occurs after the 32nd byte of a frame has been transmitted

QUESTION 6

A Cisco IP phone receive untagged data traffic from an attached PC. Which action is taken by the phone?

A.It allows the traffic to pass through unchanged

B.It drops the traffic

C.It tags the traffic with the default VLAN

D.It tags the traffic with the native VLAN

QUESTION 7

What benefit does controller-based networking provide versus traditional networking?

A.provides an added layer of security to protect from DDoS attacks

B.combines control and data plane functionality on a single device to minimize latency

C.moves from a two-tier to a three-tier network architecture to provide maximum redundancy

D.allows configuration and monitoring of the network from one centralized point

QUESTION 8

When a floating static route is configured, which action ensures that the backup route is used when the primary route fails?

A、The floating static route must have a higher administrative distance than the primary route so it is used as a backup

B、The administrative distance must be higher on the primary route so that the backup route becomes secondary.

C、The floating static route must have a lower administrative distance than the primary route so it is used as a backup

D、The default-information originate command must be configured for the route to be installed into the routing table

QUESTION 9

Which mode must be used to configure EtherChannel between two switches without using a negotiation protocol?

A.on

B.auto

C.active

D.desirable

QUESTION 10

What are two descriptions of three-tier network topologies? (Choose two.)

A.The distribution layer runs Layer 2 and Layer 3 technologies.

B.The network core is designed to maintain continuous connectivity when devices fail.

C.The core layer maintains wired connections for each host.

D.The core and distribution layers perform the same functions

E.The access layer manages routing between devices in different domains.