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Câu hỏi ôn tập CCNA

Được đăng lên bởi Giang Nguyen
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50 câu hỏi ôn tập CCNA
1. The network administrator has discovered that the power supply has failed on a switch in the
company LAN and that the switch has stopped functioning. It has been replaced with a Cisco
Catalyst 2950 series switch. What must be done to ensure that this new switch becomes the
root bridge on the network?
a. Lower the bridge priority number.
b. Change the MAC of the Switch.
c. Increase the VTP revision number for the domain.
d. Lower the root path cost on the switch ports.
e. Assign the switch an IP address with the lowest value.
Answer: A
2. Refer to the exhibit. Which two statements are true about the loopback address that is
configured on RouterB? (Choose two.)

a.
b.
c.
d.
e.

It ensures that data will be forwarded by RouterB.
It provides stability for the OSPF process on RouterB.
It specifies that the router ID for RouterB should be 10.0.0.1.
It decreases the metric for routes that are advertised from RouterB.
It indicates that RouterB should be elected the DR for the LAN.
Answer: B,C
3. A router has learned three possible routes that could be used to reach a destination network.
One route is from EIGRP and has a composite metric of 20514560. Another route is from
OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route or
routes will the router install in the routing table?
a. The OSPF route
b. The EIGRP route
c. The RIPv2 route
d. All three routes
e. The OSPF and RIPv2 routes
Answer: B
4. For what two purposes does the Ethernet protocol use physical addresses? (Choose two.)
a. to uniquely identify devices at Layer 2
b. to allow communication with devices on a different network
c. to differentiate a Layer 2 frame from a Layer 3 packet
d. to establish a priority system to determine which device gets to transmit first
e. to allow communication between different devices on the same network
f. to allow detection of a remote device when its physical address is unknown
Answer: A, E
5. What are two benefits of using VTP in a switching environment? (Choose two.)
a. It allows switches to read frame tags.
b. It allows ports to be assigned to VLANs automatically.
c. It maintains VLAN consistency across a switched network.

d. It allows frames from multiple VLANs to use a single interface.
e. It allows VLAN information to be automatically propagated throughout the switching
environment.
Answer: C, E.
6. Which two statements are true about the command ip route 172.16.3.0 255.255.255.0
192.168.2.4? (Choose two.)
a....
50 câu hỏi ôn tập CCNA
1. The network administrator has discovered that the power supply has failed on a switch in the
company LAN and that the switch has stopped functioning. It has been replaced with a Cisco
Catalyst 2950 series switch. What must be done to ensure that this new switch becomes the
root bridge on the network?
a. Lower the bridge priority number.
b. Change the MAC of the Switch.
c. Increase the VTP revision number for the domain.
d. Lower the root path cost on the switch ports.
e. Assign the switch an IP address with the lowest value.
Answer: A
2. Refer to the exhibit. Which two statements are true about the loopback address that is
configured on RouterB? (Choose two.)
a. It ensures that data will be forwarded by RouterB.
b. It provides stability for the OSPF process on RouterB.
c. It specifies that the router ID for RouterB should be 10.0.0.1.
d. It decreases the metric for routes that are advertised from RouterB.
e. It indicates that RouterB should be elected the DR for the LAN.
Answer: B,C
3. A router has learned three possible routes that could be used to reach a destination network.
One route is from EIGRP and has a composite metric of 20514560. Another route is from
OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route or
routes will the router install in the routing table?
a. The OSPF route
b. The EIGRP route
c. The RIPv2 route
d. All three routes
e. The OSPF and RIPv2 routes
Answer: B
4. For what two purposes does the Ethernet protocol use physical addresses? (Choose two.)
a. to uniquely identify devices at Layer 2
b. to allow communication with devices on a different network
c. to differentiate a Layer 2 frame from a Layer 3 packet
d. to establish a priority system to determine which device gets to transmit first
e. to allow communication between different devices on the same network
f. to allow detection of a remote device when its physical address is unknown
Answer: A, E
5. What are two benefits of using VTP in a switching environment? (Choose two.)
a. It allows switches to read frame tags.
b. It allows ports to be assigned to VLANs automatically.
c. It maintains VLAN consistency across a switched network.
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