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Cisco Certified Network Associate(CCNA) Sample Questions:

1. At which layers of the OSI model do WANs operate? (Choose two.)

A) physical layer
B) network layer
C) application layer
D) transport layer
E) datalink layer
F) session layer

2. A company has a small network, consisting of a single switch and a single router. The switch has been configured with two vlans, and route-on-a-stick is being configured on the router for inter-vlan routing. A trunk is configured to connect the switch to the router. What is the minimum number of router subinterfaces that are required for all the vlans to communicate?

A) three
B) zero
C) one
D) two

3. Refer to the exhibit. From RouterA, a network administrator is able to ping the serial interface of RouterB but unable to ping any of the subnets attached to RouterB. Based on the partial outputs in the exhibit, what could be the problem?

A) The IP addressing on the serial interface of RouterA is incorrect.
B) The EIGRP network statements are incorrectly configured.
C) EIGRP has been configured with an invalid autonomous system number.
D) The routing protocol has summarized on the classful boundary.
E) EIGRP does not support VLSM.

4. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?

A) when a dual ring topology is in use
B) during high traffic periods
C) after broken links are re-established
D) when upper-layer protocols require high reliability
E) in an improperly implemented redundant topology

5. Exhibit: Refer to the exhibit. After HostA pings HostB, which entry will be in the ARP cache of HostA to support this transmission?

Entry exhibit

A) Exhibit F
B) Exhibit A
C) Exhibit D
D) Exhibit B
E) Exhibit C
F) Exhibit E

Solutions: