[2021-New] Cisco 100-105 Dumps With Update Exam Questions (1-10)

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100-105 Exam Questions - Online Test

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Q1. - (Topic 1)

Refer to the exhibit.

A network has been planned as shown. Which three statements accurately describe the areas and devices in the network plan? (Choose three.)

A. Network Device A is a switch.

B. Network Device B is a switch.

C. Network Device A is a hub.

D. Network Device B is a hub.

E. Area 1 contains a Layer 2 device.

F. Area 2 contains a Layer 2 device.

Answer: A,D,E

Explanation:

Switches use a separate collision domain for each port, so device A must be a switch. Hubs, however, place all ports in the same collision domain so device B is a hub. Switches reside in layer 2 while hubs are layer 1 devices.

Q2. - (Topic 3)

Which one of the following IP addresses is the last valid host in the subnet using mask 255.255.255.224?

A. 192.168.2.63

B. 192.168.2.62

C. 192.168.2.61

D. 192.168.2.60

E. 192.168.2.32

Answer: B

Explanation:

With the 224 there are 8 networks with increments of 32 One of these is 32 33 62 63 where 63 is broadcast so 62 is last valid host out of given choices.

Q3. - (Topic 5)

Refer to the exhibit.

A network technician is asked to design a small network with redundancy. The exhibit represents this design, with all hosts configured in the same VLAN. What conclusions can be made about this design?

A. This design will function as intended.

B. Spanning-tree will need to be used.

C. The router will not accept the addressing scheme.

D. The connection between switches should be a trunk.

E. The router interfaces must be encapsulated with the 802.1Q protocol.

Answer: C

Explanation:

The proposed addressing scheme is on the same network. Cisco routers will not allow you to assign two different interfaces to be on the same IP subnet.

Q4. - (Topic 3)

Refer to the exhibit.

Which default gateway address should be assigned to HostA?

A. 192.168.1.1

B. 192.168.1.65

C. 192.168.1.66

D. 192.168.1.129

E. 10.1.1.1

F. 10.1.1.2

Answer: B

Explanation:

The default gateway will be the IP address of the router that it connects to, not the switch.

Q5. - (Topic 1)

Refer to the exhibit.

As packets travel from Mary to Robert, which three devices will use the destination MAC address of the packet to determine a forwarding path? (Choose three.)

A. Hub1

B. Switch1

C. Router1

D. Switch2

E. Router2

F. Switch3

Answer: B,D,F

Explanation:

Switches use the destination MAC address information for forwarding traffic, while routers use the destination IP address information. Local Area Networks employ Layer 2 Switches and Bridges to forward and filter network traffic. Switches and Bridges operate at the Data Link Layer of the Open System Interconnect Model (OSI). Since Switches and Bridges operate at the Layer 2 they operate more intelligently than hubs, which work at Layer 1 (Physical Layer) of the OSI. Because the switches and bridges are able to listen to the traffic on the wire to examine the source and destination MAC address. Being able to listen to the traffic also allows the switches and bridges to compile a MAC address table to better filter and forward network traffic. To accomplish the above functions switches and bridges carry out the following tasks: MAC address learning by a switch or a bridge is accomplished by the same method. The switch or bridge listens to each device connected to each of its ports and scan the incoming frame for the source MAC address. This creates a MAC address to port map that is cataloged in the switches/bridge MAC database. Another name for the MAC address table is content addressable memory or CAM table. When a switch or bridge is listening to the network traffic, it receives each frame and compares it to the MAC address table. By checking the MAC table the switch/ bridge are able o determine which port the frame came in on. If the frame is on the MAC table the frame is filtered or transmitted on only that port. If the switch determines that the frame is not on the MAC table, the frame is forwarded out to all ports except the incoming port.

Q6. - (Topic 3)

Refer to the exhibit.

A network associate has configured OSPF with the command:

City(config-router)# network 192.168.12.64 0.0.0.63 area 0

After completing the configuration, the associate discovers that not all the interfaces are participating in OSPF. Which three of the interfaces shown in the exhibit will participate in OSPF according to this configuration statement? (Choose three.)

A. FastEthernet0 /0

B. FastEthernet0 /1

C. Serial0/0

D. Serial0/1.102

E. Serial0/1.103

F. Serial0/1.104

Answer: B,C,D

Explanation:

The “network 192.168.12.64 0.0.0.63 equals to network 192.168.12.64/26. This network has:

Increment: 64 (/26= 1111 1111.1111 1111.1111 1111.1100 0000)

Network address: 192.168.12.64

Broadcast address: 192.168.12.127

Therefore all interface in the range of this network will join OSPF.

Q7. - (Topic 3)

Refer to the exhibit.

Which two statements are correct? (Choose two.)

A. This is a default route.

B. Adding the subnet mask is optional for the ip route command.

C. This will allow any host on the 172.16.1.0 network to reach all known destinations beyond RouterA.

D. This command is incorrect, it needs to specify the interface, such as s0/0/0 rather than an IP address.

E. The same command needs to be entered on RouterA so that hosts on the 172.16.1.0 network can reach network 10.0.0.0.

Answer: A,C

Explanation:

This is obviously the default route which is set between the routers and since it is entered in such a manner that it ensures connectivity between the stub network and any host lying beyond RouterA.

Q8. - (Topic 7)

Which method does a connected trunk port use to tag VLAN traffic?

A. IEEE 802 1w

B. IEEE 802 1D

C. IEEE 802 1Q

D. IEEE 802 1p

Answer: C

Explanation:

http://www.cisco.com/c/en/us/support/docs/lan-switching/8021q/17056-741-4.html

Q9. - (Topic 3)

What is the OSPF default frequency, in seconds, at which a Cisco router sends hello packets on a multi-access network?

A. 10

B. 40

C. 30

D. 20

Answer: A

Explanation:

On broadcast multiacess and point-to-point links, the default is 10 seconds. On NBMA, the default is 30 seconds.

Q10. - (Topic 3)

What is the default maximum number of equal-cost paths that can be placed into the routing table of a Cisco OSPF router?

A. 2

B. 8

C. 16

D. unlimited

Answer: B

Explanation:

Maximum-paths (OSPF)

To control the maximum number of parallel routes that Open Shortest Path First (OSPF)

can support, use the maximum-paths command.

Syntax Description

maximum

Maximum number of parallel routes that OSPF can install in a routing table. The range is from 1 to 16 routes.

Command Default

8 paths