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New Cisco 100-105 Exam Dumps Collection (Question 9 - Question 18)

Q1. Refer to the topology and partial configurations shown in the exhibit.

The network administrator has finished configuring the NewYork and Sydney routers and issues the command ping Sydney from the NewYork router. The ping fails. What command or set of commands should the network administrator issue to correct this problem?

A. Sydney(config)# interface s0/0 Sydney(config-if)#cdp enable

B. Sydney(config)# interface s0/0 Sydney(config-if)# no shut

C. Sydney(config)# line vty 0 4 Sydney(config)# login Sydney(config)# password Sydney

D. Sydney(config)# ip host Sydney 10.1.1.9

E. Sydney(config)# interface s0/0

Sydney(config-if)#ip address 10.1.1.5 255.255.255.252 NewYork(config)# ip host Sydney 10.1.1.5

Answer: E

Explanation:

The IP addresses on the two Serial interfaces of two routers are not in the same subnet so they could not recognize each other and the ping failed. Therefore we must correct the IP address of one of the router so that they are in the same subnet.


Q2. Which destination IP address can a host use to send one message to multiple devices across different subnets?

A. 172.20.1.0

B. 127.0.0.1

C. 192.168.0.119

D. 239.255.0.1

Answer: D

Explanation: Multicast is a networking protocol where one host can send a message to a special multicast IP address and one or more network devices can listen for and receive

those messages.

Multicast works by taking advantage of the existing IPv4 networking infrastructure, and it does so in something of a weird fashion. As you read, keep in mind that things are a little confusing because multicast was "shoe-horned" in to an existing technology.

For the rest of this article, let's use the multicast IP address of 239.255.0.1. We'll not worry about port numbers yet, but make a mental note that they are used in multicast. We'll discuss that later.


Q3. In which circumstance is static routing most useful?

A. on a stub network

B. on a network with frequent routingchanges

C. on a network that experiences frequent link failures

D. on a large network that must share routes quickly between routers

Answer: A


Q4. Scenario:

You are a junior network engineer for a financial company, and the main office network is experiencing network issues. Troubleshoot the network issues.

Router R1 connects the main office to the internet, and routers R2 and R3 are internal routers.

NAT is enabled on router R1.

The routing protocol that is enabled between routers R1, R2 and R3 is RIPv2.

R1 sends the default route into RIPv2 for the internal routers to forward internet traffic to R1.

You have console access on R1, R2 and R3 devices. Use only show commands to troubleshoot the issues.

R1 router clock is synchronized with ISP router R2 is supposed to receive NTP updates from R1. But you observe that R2 clock is not synchronized with R1. What is the reason R2 is not receiving NTP updates from R1?

A. The IP address that is used in the NTP configuration on R2 router is incorrect.

B. The NTP server command not configured on R2 router.

C. R2 router Ethernet interface that is connected to R1 is placed in shutdown condition.

D. R1 router Ethernet interface that is connected to R2 is placed in shutdown condition.

Answer: A

Explanation:

Check the below configuration for this


Q5. An administrator issues the show ip interface s0/0 command and the output displays that interface Serial0/0 is up, line protocol is up What does "line protocol is up" specifically indicate about the interface?

A. The cable is attached properly.

B. CDP has discovered the connected device.

C. Keepalives are being received on the interface.

D. A carrier detect signal has been received from the connected device.

E. IP is correctly configured on the interface.

Answer: C


Q6. CORRECT TEXTThis topology contains 3 routers and 1 switch. Complete the topology.

Drag the appropriate device icons to the labeled Device

Drag the appropriate connections to the locations labeled Connections. Drag the appropriate IP addresses to the locations labeled IP address

(Hint: use the given host addresses and Main router information) To remove a device or connection, drag it away from the topology.

Use information gathered from the Main router to complete the configuration of any additional routers.

No passwords are required to access the Main router. The config terminal command has been disabled for the HQ router. The router does not require any configuration.

Configure each additional router with the following:

Configure the interfaces with the correct IP address and enable the interfaces. Set the password to allow console access to consolepw

Set the password to allow telnet access to telnetpw

Set the password to allow privilege mode access to privpw

Not E: Because routes are not being added to the configurations, you will not be able to ping through the internetwork.

All devices have cable autosensing capabilities disabled. All hosts are PCu2019s

Answer:

Specify appropriate devices and drag them on the "Device" boxes

For the device at the bottom-right box, we notice that it has 2 interfaces Fa0/2 and Fa0/4; moreover the link connects the PC on the right with the device on the bottom-right is a straight-through link -> it is a switch

The question stated that this topology contains 3 routers and 1 switch -> two other devices are routers

Place them on appropriate locations as following:

(Host D and host E will be automatically added after placing two routers. Click on them to access neighboring routers)

Specify appropriate connections between these devices:

+ The router on the left is connected with the Main router through FastEthernet interfaces: use a crossover cable

+ The router on the right is connected with the Main router through Serial interfaces: use a serial cable

+ The router on the right and the Switch: use a straight-through cable

+ The router on the left and the computer: use a crossover cable

(To remember which type of cable you should use, follow these tips:

- To connect two serial interfaces of 2 routers we use serial cable

- To specify when we use crossover cable or straight-through cable, we should remember:

Group 1: Router, Host, Server

Group 2: Hub, Switch

One device in group 1 + One device in group 2: use straight-through cable

Two devices in the same group: use crossover cable

For example, we use straight-through cable to connect switch to router, switch to host, hub to host, hub to server... and we use crossover cable to connect switch to switch, switch to hub, router to router, host to host.)

Assign appropriate IP addresses for interfaces:

From Main router, use show running-config command.

(Notice that you may see different IP addresses in the real CCNA exam, the ones shown above are just used for demonstration)

From the output we learned that the ip address of Fa0/0 interface of the Main router is 192.168.152.177/28. This address belongs to a subnetwork which has:

Increment: 16 (/28 = 255.255.255.240 or 1111 1111.1111 1111.1111 1111.1111 0000)

Network address: 192.168.152.176 (because 176 = 16 * 11 and 176 < 177)

Broadcast address: 192.168.152.191 (because 191 = 176 + 16 - 1)

And we can pick up an ip address from the list that belongs to this subnetwork:

192.168.152.190 and assign it to the Fa0/0 interface the router on the left

Use the same method for interface Serial0/0 with an ip address of 192.168.152.161 Increment: 16

Network address: 192.168.152.160 (because 160 = 16 * 10 and 160 < 161)

Broadcast address: 192.168.152.175 (because 176 = 160 + 16 - 1)

-> and we choose 192.168.152.174 for Serial0/0 interface of the router on the right Interface Fa0/1 of the router on the left

IP (of the computer on the left) : 192.168.152.129/28 Increment: 16

Network address: 192.168.152.128 (because 128 = 16 * 8 and 128 < 129)

Broadcast address: 192.168.152.143 (because 143 = 128 + 16 - 1)

-> we choose 192.168.152.142 from the list Interface Fa0/0 of the router on the right

IP (of the computer on the left) : 192.168.152.225/28 Increment: 16

Network address: 192.168.152.224 (because 224 = 16 * 14 and 224 < 225)

Broadcast address: 192.168.152.239 (because 239 = 224 + 16 - 1)

-> we choose 192.168.152.238 from the list

Let's have a look at the picture below to summarize

Configure two routers on the left and right with these commands: Router1 = router on the left

Assign appropriate IP addresses to Fa0/0 & Fa0/1 interfaces: Router1>enable

Router1#configure terminal Router1(config)#interface fa0/0

Router1(config-if)#ip address 192.168.152.190 255.255.255.240 Router1(config-if)#no shutdown

Router1(config-if)#interface fa0/1

Router1(config-if)#ip address 192.168.152.142 255.255.255.240 Router1(config-if)#no shutdown

Set passwords (configure on two routers)

+ Console password: Router1(config-if)#exit Router1(config)#line console 0

Router1(config-line)#password consolepw Router1(config-line)#login

Router1(config-line)#exit

+ Telnet password: Router1(config)#line vty 0 4 Router1(config-line)#password telnetpw Router1(config-line)#login Router1(config-line)#exit

+ Privilege mode password: Router1(config)#enable password privpw Save the configuration: Router1(config)#exit

Router1#copy running-config startup-config

Configure IP addresses of Router2 (router on the right) Router2>enable

Router2#configure terminal Router2(config)#interface fa0/0

Router2(config-if)#ip address 192.168.152.238 255.255.255.240 Router2(config-if)#no shutdown

Router2(config-if)#interface serial0/0

Router2(config-if)#ip address 192.168.152.174 255.255.255.240 Router2(config-if)#no shutdown

Then set the console, telnet and privilege mode passwords for Router2 as we did for Router1, remember to save the configuration when you finished.

Topic 7, Mix Questions

204.Which statement about 6to4 tunneling is true?

A. One tunnel endpoint must be configured with IPv4 only

B. It establishes a point-to-point tunnel

C. Both tunnel endpoints must be configured with IPv4 only

D. Both tunnel endpoints must support IPv4 and IPv6


Q7. Which subnet address is for the IP address 172.19.20.23/28?

A. 172.19.20.20

B. 172.19.20.0

C. 172.19.20.32

D. 172.19.20.15

E. 172.19.20.16

Answer: E


Q8. Which statement about unicast frame forwarding on a switch is true?

A. The TCAM table stores destination MAC addresses

B. If the destination MAC address is unknown, the frame is flooded to every port that is configured in the same VLAN except on the port that it was received on.

C. The CAM table is used to determine whether traffic is permitted or denied on a switch

D. The source address is used to determine the switch port to which a frame is forwarded

Answer: B


Q9. Which statement is correct about the internetwork shown in the diagram?

A. Switch 2 is the root bridge.

B. Spanning Tree is not running.

C. Host D and Server 1 are in the same network.

D. No collisions can occur in traffic between Host B and Host C.

E. If Fa0/0 is down on Router 1, Host A cannot access Server 1.

F. If Fa0/1 is down on Switch 3, Host C cannot access Server 2.

Answer: E


Q10. Which option is a valid hostname for a switch?

A. Switch-Cisco

B. Switch-Cisco!

C. SwitchCisco

D. SwitchCisc0

Answer: D


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