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New Cisco 100-105 Exam Dumps Collection (Question 13 - Question 22)

Q13. Which two characteristics apply to Layer 2 switches? (Choose two.)

A. Increases the number of collision domains

B. Decreases the number of collision domains

C. Implements VLAN

D. Decreases the number of broadcast domains

E. Uses the IP address to make decisions for forwarding data packets

Answer: A,C

Explanation:

Layer 2 switches offer a number of benefits to hubs, such as the use of VLANs and each switch port is in its own separate collision domain, thus eliminating collisions on the segment.

Q14. 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/

Q15. An administrator must assign static IP addresses to the servers in a network. For network 192.168.20.24/29, the router is assigned the first usable host address while the sales server is given the last usable host address.

Which of the following should be entered into the IP properties box for the sales server?

A. IP address: 192.168.20.14

Subnet Mask: 255.255.255.248

Default Gateway: 192.168.20.9

B. IP address: 192.168.20.254

Subnet Mask: 255.255.255.0

Default Gateway: 192.168.20.1

C. IP address: 192.168.20.30

Subnet Mask: 255.255.255.248

Default Gateway: 192.168.20.25

D. IP address: 192.168.20.30

Subnet Mask: 255.255.255.240

Default Gateway: 192.168.20.17

E. IP address: 192.168.20.30

Subnet Mask: 255.255.255.240

Default Gateway: 192.168.20.25

Answer: C

Explanation:

With network 192.168.20.24/29 we have:

Increment: 8 (/29 = 255.255.255.248 = 11111000 for the last octet) Network address: 192.168.20.24 (because 24 = 8 * 3)

Broadcast address: 192.168.20.31 (because 31 = 24 + 8 u2013 1)

Therefore the first usable IP address is 192.168.20.25 (assigned to the router) and the last usable IP address is 192.168.20.30 (assigned to the sales server). The IP address of the router is also the default gateway of the sales server.

Q16.

What is the subnet broadcast address of the LAN connected to Router1?

A. 192.168.8.15

B. 192.168.8.31

C. 192.168.8.63

D. 192.168.8.127

Answer: A

Explanation:

The IP address assigned to FA0/1 is 192.168.8.9/29, making 192.168.8.15 the broadcast address.

Q17. What is the purpose of assigning an IP address to a switch?

A. provides local hosts with a default gateway address

B. allows remote management of the switch

C. allows the switch to respond to ARP requests between two hosts

D. ensures that hosts on the same LAN can communicate with each other

Answer: B

Explanation:

A switch is a layer 2 device and doesnu2021t use network layer for packet forwarding. The IP

address may be used only for administrative purposes such as Telnet access or for network management purposes.

Q18. Two routers named Atlanta and Brevard are connected by their serial interfaces as shown in the exhibit, but there is no data connectivity between them. The Atlanta router is known to have a correct configuration.

Given the partial configurations shown in the exhibit, what is the problem on the Brevard router that is causing the lack of connectivity?

A. A loopback is not set.

B. The IP address is incorrect.

C. The subnet mask is incorrect.

D. The serial line encapsulations are incompatible.

E. The maximum transmission unit (MTU) size is too large.

F. The bandwidth setting is incompatible with the connected interface.

Answer: B

Explanation:

The connection between two routers must have IP addresses that belong to the same subnet, but in this case Atlanta is using 192.168.10.1/24 and the other is in 192.168.11.1/24.

Q19. Which transport layer protocol provides best-effort delivery service with no acknowledgment receipt required?

A. HTTP

B. IP

C. TCP

D. Telnet

E. UDP

Answer: E

Explanation:

UDP provides a connectionless datagram service that offers best-effort delivery, which means that UDP does not guarantee delivery or verify sequencing for any datagrams. A source host that needs reliable communication must use either TCP or a program that

provides its own sequencing and acknowledgment services.

Q20. After the network has converged, what type of messaging, if any, occurs between R3 and R4?

A. No messages are exchanged

B. Hellos are sent every 10 seconds.

C. The full database from each router is sent every 30 seconds.

D. The routing table from each router is sent every 60 seconds.

Answer: B

Explanation:

HELLO messages are used to maintain adjacent neighbors so even when the network is converged, hellos are still exchanged. On broadcast and point-to-point links, the default is 10 seconds, on NBMA the default is 30 seconds.

Although OSPF is a link-state protocol the full database from each router is sent every 30 minutes (not seconds) therefore, C and D are not correct.

Q21. Refer to the exhibit.

SwitchA receives the frame with the addressing shown in the exhibit. According to the command output also shown in the exhibit, how will SwitchA handle this frame?

A. It will drop the frame.

B. It will forward the frame out port Fa0/6 only.

C. It will forward the frame out port Fa0/3 only.

D. It will flood the frame out all ports.

E. It will flood the frame out all ports except Fa0/3.

Answer: E

Explanation:

When frame receives the frame, it checks the source address on MAC table if MAC address found in MAC table it tries to forward if not in MAC table adds the Address on MAC table. After checking the source address, it checks the destination address on MAC table, if MAC address found on MAC table it forwards to proper ports otherwise floods on all ports except the source port.

Q22. The following commands are entered on the router:

Burbank(config)# enable secret fortress Burbank(config)# line con 0 Burbank(config-line)# login

Burbank(config-line)# password n0way1n Burbank(config-line)# exit

Burbank(config)# service password-encryption What is the purpose of the last command entered?

A. to require the user to enter an encrypted password during the login process

B. to prevent the vty, console, and enable passwords from being displayed in plain text in the configuration files

C. to encrypt the enable secret password

D. to provide login encryption services between hosts attached to the router

Answer: B

Explanation:

Certain types of passwords, such as Line passwords, by default appear in clear text in the configuration file. You can use the service password-encryption command to make them more secure. Once this command is entered, each password configured is automatically encrypted and thus rendered illegible inside the configuration file (much as the Enable/Enable Secret passwords are). Securing Line passwords is doubly important in networks on which TFTP servers are used, because TFTP backup entails routinely moving config files across networksu2014and config files, of course, contain Line passwords.

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