[Free] 2017(July) EnsurePass Examcollection Cisco 100-105 Dumps with VCE and PDF 131-140

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

Question No: 131 – (Topic 3)

Refer to the output of the corporate router routing table shown in the graphic.


The corporate router receives an IP packet with a source IP address of and a destination address of

What will the router do with this packet?

  1. It will encapsulate the packet as Frame Relay and forward it out interface Serial 0/0.117.

  2. It will discard the packet and send an ICMP Destination Unreachable message out interface FastEthernet 0/0.

  3. It will forward the packet out interface Serial 0/1 and send an ICMP Echo Reply message out interface serial 0/0.102.

  4. It will change the IP packet to an ARP frame and forward it out FastEthernet 0/0.

Answer: B Explanation:

Since the destination network is not in the routing table, and no default gateway has been configured, the router will discard the packet and send an ICMP Destination Unreachable message out interface FastEthernet 0/0. It knows to send it out Fa 0/0 because the routing table for the source IP address of shows it was learned from the Fa 0/0 interface.

Question No: 132 – (Topic 3)

Refer to the exhibit.


The network is converged.After link-state advertisements are received from Router_A, what information will Router_E contain in its routing table for the subnets and

A.[110/13] via, 00:00:07, FastEthemet0/0[110/13] via, 00:00:16, FastEthemet0/0

B.[110/1] via, 00:00:07, Serial1/0[110/3] via, 00:00:16, FastEthemet0/0

C.[110/13] via, 00:00:07, Serial1/0[110/13] via, 00:00:16, Serial1/0[110/13] via, 00:00:16, FastEthemet0/0

D.[110/3] via, 00:00:07, Serial1/0[110/3] via, 00:00:16, Serial1/0

Answer: A Explanation:

Router_E learns two subnets subnets and via Router_A through FastEthernet interface. The interface cost is calculated with the formula 108 / Bandwidth. For FastEthernet it is 108 / 100 Mbps = 108 / 100,000,000 = 1. Therefore the cost is 12 (learned from Router_A) 1 = 13 for both subnets -gt;

The cost through T1 link is much higher than through T3 link (T1 cost = 108 / 1.544 Mbps = 64; T3 cost = 108 / 45 Mbps = 2) so surely OSPF will choose the path through T3 link -gt; Router_E will choose the path from Router_A through FastEthernet0/0, not Serial1/0.

In fact, we can quickly eliminate answers B, C and D because they contain at least one subnet learned from Serial1/0 -gt; they are surely incorrect.

Question No: 133 – (Topic 3)

Which statement about IPv6 is true?

  1. Addresses are not hierarchical and are assigned at random.

  2. Only one IPv6 address can exist on a given interface.

  3. There are 2.7 billion addresses available.

  4. Broadcasts have been eliminated and replaced with multicasts.

Answer: D Explanation:

IPv6 has three types of addresses, which can be categorized by type and scope: Unicast addresses. A packet is delivered to one interface.

Multicast addresses. A packet is delivered to multiple interfaces.

Anycast addresses. A packet is delivered to the nearest of multiple interfaces (in terms of routing distance).

IPv6 does not use broadcast messages.

Unicast and anycast addresses in IPv6 have the following scopes (for multicast addresses, the scope are built into the address structure):

Link-local. The scope is the local link (nodes on the same subnet). Site-local. The scope is the organization (private site addressing). Global. The scope is global (IPv6 Internet addresses).

In addition, IPv6 has special addresses such as the loopback address. The scope of a special address depends on the type of special address.

Much of the IPv6 address space is unassigned. http://technet.microsoft.com/en-us/library/cc757359(v=ws.10).aspx

Question No: 134 – (Topic 3)

Refer to the exhibit.


Given the output for this command, if the router ID has not been manually set, what router ID will OSPF use for this router?





Answer: C Explanation:

The highest IP address of all loopback interfaces will be chosen -gt; Loopback 0 will be chosen as the router ID.

Question No: 135 – (Topic 3)

On a live network, which commands will verify the operational status of router interfaces? (Choose two.)

  1. Router# show interfaces

  2. Router# show ip protocols

  3. Router# debug interface

  4. Router# show ip interface brief

  5. Router# show start

Answer: A,D Explanation:

Only two commands 鈥渟how interfaces鈥?and 鈥渟how ip interface brief鈥?reveal the status of router interfaces (up/up, for example).

Question No: 136 – (Topic 3)

What is the default administrative distance of OSPF?

A. 90 B. 100 C. 110 D. 120

Answer: C Explanation:

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.

Default Distance Value Table

This table lists the administrative distance default values of the protocols that Cisco supports:


Question No: 137 – (Topic 3)

ROUTER# show ip route is variably subnetted, 9 subnets, 3 masks

C /28 is directly connected, Loopback1 C /28 is directly connected, Ethernet0 C /28 is directly connected, Loopback0

O /30 [110/128] via, 00:35:36, Serial0

C /30 is directly connected, Serial0

O /30 [110/782] via, 00:35:36, Serial0

O /30 [110/128] via, 00:35:36, Serial0

O /30 [110/782] via, 00:35:37, Serial0

O /30 [110/782] via, 00:35:37, Serial0

O [110/128] via, 00:35:36, Serial 0

To what does the 128 refer to in the router output above?

  1. OSPF cost

  2. OSPF priority

  3. OSPF hop count

  4. OSPF ID number

  5. OSPF administrative distance

Answer: A Explanation:

The first parameter is the Administrative Distance of OSPF (110) while the second parameter is the cost of OSPF.

Question No: 138 – (Topic 3)

Which statement describes the process ID that is used to run OSPF on a router?

  1. It is globally significant and is used to represent the AS number.

  2. It is locally significant and is used to identify an instance of the OSPF database.

  3. It is globally significant and is used to identify OSPF stub areas.

  4. It is locally significant and must be the same throughout an area.

Answer: B Explanation:

The Process ID for OSPF on a router is only locally significant and you can use the same number on each router, or each router can have a different number-it just doesn#39;t matter. The numbers you can use are from 1 to 65,535. Don#39;t get this confused with area numbers, which can be from 0 to 4.2 billion.

Question No: 139 – (Topic 3)

Which statements describe the routing protocol OSPF? (Choose three.)

  1. It supports VLSM.

  2. It is used to route between autonomous systems.

  3. It confines network instability to one area of the network.

  4. It increases routing overhead on the network.

  5. It allows extensive control of routing updates.

  6. It is simpler to configure than RIP v2.

Answer: A,C,E Explanation:

Routing overhead is the amount of information needed to describe the changes in a dynamic network topology.

All routers in an OSPF area have identical copies of the topology database and the topology database of one area is hidden from the rest of the areas to reduce routing overhead because fewer routing updates are sent and smaller routing trees are computed and maintained (allow extensive control of routing updates and confine network instability to one area of the network).

Question No: 140 – (Topic 3)

Refer to the exhibit.


The two routers have had their startup configurations cleared and have been restarted. At a minimum, what must the administrator do to enable CDP to exchange information between R1 and R2?

  1. Configure the router with the cdp enable command.

  2. Enter no shutdown commands on the R1 and R2 fa0/1 interfaces.

  3. Configure IP addressing and no shutdown commands on both the R1 and R2 fa0/1 interfaces.

  4. Configure IP addressing and no shutdown commands on either of the R1 or R2 fa0/1 interfaces.

Answer: B Explanation:

If the no shut down commands are not entered, then CDP can exchange information between the two routers. By default, all Cisco device interfaces and ports are shut down and need to be manually enabled.

Topic 4, Infrastructure Services

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