[Free] 2017(July) EnsurePass Examcollection Cisco 100-105 Dumps with VCE and PDF 111-120

2017 July Cisco Official New Released 100-105
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Cisco Interconnecting Cisco Networking Devices Part 1 (ICND1 v3.0)

Question No: 111 – (Topic 3)

Refer to the exhibit.


The internetwork is using subnets of the address with a subnet mask of The routing protocol in use is RIP version 1. Which address could be assigned to the FastEthernet interface on RouterA?






Answer: D Explanation:

Subnet mask with CIDR of /27 which results in 32 hosts per. is the broadcast address for sunbet #39;0#39; is the network address for subnet #39;2#39; is the broadcast address for subnet #39;3#39; is the network address for subnet #39;6#39;


Question No: 112 – (Topic 3)

Refer to the exhibit.


A network associate has configured OSPF with the command: City(config-router)# network 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.)

  1. FastEthernet0 /0

  2. FastEthernet0 /1

  3. Serial0/0

  4. Serial0/1.102

  5. Serial0/1.103

  6. Serial0/1.104

Answer: B,C,D Explanation:

The 鈥渘etwork equals to network This network has:

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

Network address:

Broadcast address:

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

Question No: 113 – (Topic 3)

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

  1. provides local hosts with a default gateway address

  2. allows remote management of the switch

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

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

Answer: B Explanation:

A switch is a layer 2 device and doesn’t 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.

Question No: 114 – (Topic 3)

Which two statements describe the process identifier that is used in the command to configure OSPF on a router? (Choose two.)

Router(config)# router ospf 1

  1. All OSPF routers in an area must have the same process ID.

  2. Only one process number can be used on the same router.

  3. Different process identifiers can be used to run multiple OSPF processes

  4. The process number can be any number from 1 to 65,535.

  5. Hello packets are sent to each neighbor to determine the processor identifier.

Answer: C,D Explanation:

Multiple OSPF processes can be configured on a router using multiple process ID’s. The valid process ID’s are shown below:

Edge-B(config)#router ospf

lt;1-65535gt; Process ID

Question No: 115 – (Topic 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?

  1. the OSPF route

  2. the EIGRP route

  3. the RIPv2 route

  4. all three routes

  5. the OSPF and RIPv2 routes

Answer: B Explanation:

When one route is advertised by more than one routing protocol, the router will choose to use the routing protocol which has lowest Administrative Distance. The Administrative Distances of popular routing protocols are listed below:


Question No: 116 – (Topic 3)

What does administrative distance refer to?

  1. the cost of a link between two neighboring routers

  2. the advertised cost to reach a network

  3. the cost to reach a network that is administratively set

  4. a measure of the trustworthiness of a routing information source

Answer: D

Reference: http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094195.shtml

Administrative distance is the feature that routers use in order to select the best path when

there are two or more different routes to the same destination from two different routing protocols. Administrative distance defines the reliability of a routing protocol. Each routing protocol is prioritized in order of most to least reliable (believable) with the help of an administrative distance value.

Administrative distance is the first criterion that a router uses to determine which routing protocol to use if two protocols provide route information for the same destination.

Administrative distance is a measure of the trustworthiness of the source of the routing information. The smaller the administrative distance value, the more reliable the protocol.

Question No: 117 – (Topic 3)

Which IP addresses are valid for hosts belonging to the subnet? (Choose three.)







Answer: A,C,D Explanation:

All IP address in IP ranges between: and are valid as shown below

Address: 00001010.00000001.1010 0000.00000000

Netmask: = 20 11111111.11111111.1111 0000.00000000

Wildcard: 00000000.00000000.0000 1111.11111111

Which implies that:

Network: 00001010.00000001.1010 0000.00000000

HostMin: 00001010.00000001.1010 0000.00000001

HostMax: 00001010.00000001.1010 1111.11111110

Broadcast: 00001010.00000001.1010 1111.11111111

Question No: 118 – (Topic 3)

Refer to the exhibit.


Which two statements are true about the loopback address that is configured on RouterB? (Choose two.)

  1. It ensures that data will be forwarded by RouterB.

  2. It provides stability for the OSPF process on RouterB.

  3. It specifies that the router ID for RouterB should be

  4. It decreases the metric for routes that are advertised from RouterB.

  5. It indicates that RouterB should be elected the DR for the LAN.

Answer: B,C Explanation:

A loopback interface never comes down even if the link is broken so it provides stability for the OSPF process (for example we use that loopback interface as the router-id) –

The router-ID is chosen in the order below:

The highest IP address assigned to a loopback (logical) interface.

If a loopback interface is not defined, the highest IP address of all active router’s physical interfaces will be chosen.

-gt; The loopback interface will be chosen as the router ID of RouterB –

Question No: 119 – (Topic 3)


Refer to the topology. Your company has decided to connect the main office with three other remote branch offices using point-to-point serial links.

You are required to troubleshoot and resolve OSPF neighbor adjacency issues between the main office and the routers located in the remote branch offices.









An OSPF neighbor adjacency is not formed between R3 in the main office and R5 in the Branch2 office. What is causing the problem?

  1. There is an area ID mismatch.

  2. There is a PPP authentication issue; a password mismatch.

  3. There is an OSPF hello and dead interval mismatch.

  4. There is a missing network command in the OSPF process on R5.

Answer: C Explanation:

The 鈥渟how ip ospf interface command on R3 and R5 shows that the hello and dead intervals do not match. They are 50 and 200 on R3 and 10 and 40 on R5.


Question No: 120 – (Topic 3)

Refer to the exhibit.


If the resume command is entered after the sequence that is shown in the exhibit, which router prompt will be displayed?

  1. Router1gt;

  2. Router1#

  3. Router2gt;

  4. Router2#

Answer: C Explanation:

After resuming the telnet session by using the Enter key after it has been suspended, it will resume back to the telnet session so it will be back to the router2gt; prompt.

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