[2021-New] Cisco 100-105 Dumps With Update Exam Questions (71-80)

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Q1. DRAG DROP - (Topic 4)

Various protocols are listed on the left. On the right are applications for the use of those protocols. Drag the protocol on the left to an associated function for that protocol on the right. (Not all options are used.)

Answer:

Q2. - (Topic 3)

The command ip route 192.168.100.160 255.255.255.224 192.168.10.2 was issued on a router. No routing protocols or other static routes are configured on the router. Which statement is true about this command?

A. The interface with IP address 192.168.10.2 is on this router.

B. The command sets a gateway of last resort for the router.

C. Packets that are destined for host 192.168.100.160 will be sent to 192.168.10.2.

D. The command creates a static route for all IP traffic with the source address

192.168.100.160.

Answer: C

Explanation:

With 160 it's actually network address of /27 so any address within the range of .160-.191 network will be sent to 192.168.10.2

Q3. - (Topic 3)

Some routers have been configured with default routes. What are some of the advantages

of using default routes? (Choose two)

A. They establish routes that will never go down.

B. They keep routing tables small.

C. They require a great deal of CPU power.

D. They allow connectivity to remote networks that are not in the routing table

E. They direct traffic from the internet into corporate networks.

Answer: B,D

Explanation:

Cisco administration 101: What you need to know about default routes Reference:

http://www.techrepublic.com/article/cisco-administration-101-what-you-need-to-know-about-default-routes/

Q4. - (Topic 4)

A network administrator cannot connect to a remote router by using SSH. Part of the show interfaces command is shown.

router#show interfaces

Serial0/1/0 is up, line protocol is down

At which OSI layer should the administrator begin troubleshooting?

A. physical

B. data link

C. network

D. transport

Answer: B

Explanation:

https://learningnetwork.cisco.com/thread/12389

I think the indication here is "Serial 0 is up, line protocol is down". What causes this indication? Correct me if I am wrong. When you have this indication, a cable unplugged is not a correct answer. If you check the output of your "show interface serial 0" command again, you should notice it as "Serial 0 is down, line protocol is down. Under the "show ip int brief" you should see status = down and protocol = down as opposed to up, down. Because you disconnected the cable, layer 1 will go down, which is indicated by the serial 0 down status. The line protocol status is for layer 2. So, a cable unplugged is not a correct answer to "Serial 0 is up, line protocol is down". Up/down means that the physical layer is OK, but there is a problem with the data link link (line protocol).

Q5. - (Topic 1)

Refer to the exhibit.

Mary is sending an instant message to Robert. The message will be broken into a series of packets that will traverse all network devices. What addresses will populate these packets as they are forwarded from Router1 to Router2?

A. Option A

B. Option B

C. Option C

D. Option D

E. Option E

Answer: B

Explanation:

The Source and Destination IP address is not going to change. Host 1 IP address will stay

as being the source IP and the Host 2 IP address will stay the destination IP address.

Those two are not going to change.

For the MAC address it is going to change each time it goes from one hope to another.

(Except switches... they don't change anything)

Frame leaving HOST 1 is going to have a source MAC of Host 1 and a destination MAC of

Router 1.

Router 1 is going to strip that info off and then will make the source MAC address of Router1's exiting interface, and making Router2's interface as the destination MAC address. Then the same will happen... Router2 is going to change the source/destination info to the source MAC being the Router2 interface that it is going out, and the destination will be Host2's MAC address.

Q6. - (Topic 1)

Which two characteristics describe the access layer of the hierarchical network design model? (Choose two.)

A. layer 3 support

B. port security

C. redundant components

D. VLANs

E. PoE

Answer: B,D

Explanation:

Access layer The main purpose of the access layer is to provide direct connection to devices on the network and controlling which devices are allowed to communicate over it. The access layer interfaces with end devices, such as PCs, printers, and IP phones, to provide access to the rest of the network. The access layer can include routers, switches, bridges, hubs, and wireless access points (AP).

Switch features in the Access layer:

......

Port security

VLANs

Fast Ethernet/Gigabit Ethernet

Power over Ethernet (PoE)

Link aggregation

Quality of Service (QoS)

References: http://www.ciscopath.com/content/61/ http://www.mcmcse.com/cisco/guides/hierarchical_model.shtml

Topic 2, LAN Switching Technologies

Q7. - (Topic 3)

Which two statements describe the IP address 10.16.3.65/23? (Choose two.)

A. The subnet address is 10.16.3.0 255.255.254.0.

B. The lowest host address in the subnet is 10.16.2.1 255.255.254.0.

C. The last valid host address in the subnet is 10.16.2.254 255.255.254.0

D. The broadcast address of the subnet is 10.16.3.255 255.255.254.0.

E. The network is not subnetted.

Answer: B,D

Explanation:

The mask 255.255.254.0 (/23) used with a Class A address means that there are 15 subnet bits and 9 host bits. The block size in the third octet is 2 (256 - 254). So this makes the subnets in 0, 2, 4, 6, etc., all the way to 254. The host 10.16.3.65 is in the 2.0 subnet. The next subnet is 4.0, so the broadcast address for the 2.0 subnet is 3.255. The valid host addresses are 2.1 through 3.254

Q8. - (Topic 1)

Which statements accurately describe CDP? (Choose three.)

A. CDP is an IEEE standard protocol.

B. CDP is a Cisco proprietary protocol.

C. CDP is a datalink layer protocol.

D. CDP is a network layer protocol.

E. CDP can discover directly connected neighboring Cisco devices.

F. CDP can discover Cisco devices that are not directly connected.

Answer: B,C,E

Explanation:

CDP (Cisco Discovery Protocol) is a proprietary protocol designed by Cisco to help administrators collect information about both locally attached and remote devices. By using CDP, you can gather hardware and protocol information about neighbor devices containing useful info for troubleshooting and documenting the network.

Q9. - (Topic 2)

Refer to the exhibit.

All devices attached to the network are shown. How many collision domains are present in this network?

A. 2

B. 3

C. 6

D. 9

E. 15

Answer: E

Explanation:

A switch uses a separate collision domain for each port so there are a total of 9 for each device shown. In addition to this, the switch to switch connections (3) are a separate collision domain. Finally, we add the switch to router connections (2) and the router to router connection (1) for a total of 15.

Q10. - (Topic 7)

Which dynamic routing protocol uses only the hop count to determine the best path to a destination?

A. IGRP

B. RIP

C. EIGRP

D. OSPF

Answer: C