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May 18, 2017

How to pass cisco 100 105 in May 2017

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Q131. - (Topic 3) 

Which statements are TRUE regarding Internet Protocol version 6 (IPv6) addresses? (Choose three.) 

A. An IPv6 address is divided into eight 16-bit groups. 

B. A double colon (::) can only be used once in a single IPv6 address. 

C. IPv6 addresses are 196 bits in length. 

D. Leading zeros cannot be omitted in an IPv6 address. 

E. Groups with a value of 0 can be represented with a single 0 in IPv6 address. 

Answer: A,B,E 

Explanation: 

IPv6 addresses are divided into eight 16-bit groups, a double colon (::) can only be used 

once in an IPv6 address, and groups with a value of 0 can be represented with a single 0 in 

an IPv6 address. 

The following statements are also true regarding IPv6 address: 

IPv6 addresses are 128 bits in length. 

Eight 16-bit groups are divided by a colon (:). 

Multiple groups of 16-bit 0s can be represented with double colon (::). 

Double colons (::) represent only 0s. 

Leading zeros can be omitted in an IPv6 address. 

The option stating that IPv6 addresses are 196 bits in length is incorrect. IPv6 addresses 

are 128 bits in length. 

The option stating that leading zeros cannot be omitted in an IPv6 address is incorrect. 

Leading zeros can be omitted in an IPv6 address. 


Q132. - (Topic 1) 

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:

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. 


Q133. - (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 

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

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

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

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

E. 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 <1-65535> Process ID 


Q134. - (Topic 2) 

What does a host on an Ethernet network do when it is creating a frame and it does not have the destination address? 

A. Drops the frame 

B. Sends out a Layer 3 broadcast message 

C. Sends a message to the router requesting the address 

D. Sends out an ARP request with the destination IP address 

Answer:

Explanation: 

In this case, it will send out an ARP request for MAC address of the destination IP (assuming it doesn't already have it in its table) and then address it to the destination's MAC address. 


Q135. - (Topic 5) 

Refer to the exhibit. 

A technician pastes the configurations in the exhibit into the two new routers shown. Otherwise, the routers are configured with their default configurations. 

A ping from Host1 to Host 2 fails, but the technician is able to ping the S0/0 interface of R2 from Host 1. The configurations of the hosts have been verified as correct. What could be the cause of the problem? 

A. The serial cable on R1 needs to be replaced. 

B. The interfaces on R2 are not configured properly 

C. R1 has no route to the 192.168.1.128 network. 

D. The IP addressing scheme has overlapping subnetworks. 

E. The ip subnet-zero command must be configured on both routers. 

Answer:

Explanation: 

Without a static route pointing to the host 2 network the router R1 is unaware of the path to take to reach that network and reply traffic cannot be sent. 


Q136. - (Topic 3) 

The network manager has requested a 300-workstation expansion of the network. The workstations are to be installed in a single broadcast domain, but each workstation must have its own collision domain. The expansion is to be as cost-effective as possible while still meeting the requirements. 

Which three items will adequately fulfill the request? (Choose three). 

A. One IP subnet with a mask of 255.255.254.0 

B. Two IP subnets with a mask of 255.255.255.0 

C. Seven 48-port hubs 

D. Seven 48-port switches 

E. One router interface 

F. Seven router interfaces 

Answer: A,D,E 

Explanation: 

To support 300 workstations in a single broadcast domain, we need to use a subnet mask 

which supports 512 hosts = 29-> /23 or 255.255.254.0 in decimal form -> A is correct. 

If we use 48-port switches we need 300/48 = 6.25 -> seven 48-port switches are enough 

because we also need trunking between them -> D is correct. 

We only need one router interface and it is connected with one of seven switches -> E is 

correct. 


Q137. - (Topic 3) 

Which command can you use to manually assign a static IPV6 address to a router interface? 

A. ipv6 address PREFIX_1::1/64 

B. ipv6 autoconfig 2001:db8:2222:7272::72/64 

C. ipv6 autoconfig 

D. ipv6 address 2001:db8:2222:7272::72/64 

Answer:

Explanation: 

An example of configuring IPv6 on an interface is shown below: Router(config)# interface fastethernet 0/1 Router(config-if)# ipv6 address 3000::2222:1/64 


Q138. DRAG DROP - (Topic 4) 

Move the protocol or service on the left to a situation on the right where it would be used. (Not all options are used.) 

Answer: 


Q139. - (Topic 3) 

Refer to the exhibit. 

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

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

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

C. It specifies that the router ID for RouterB should be 10.0.0.1. 

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

E. 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. -> The loopback interface will be chosen as the router ID of RouterB -


Q140. - (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 208.149.23.64 and 208.149.23.96? 

A. 208.149.23.64[110/13] via 190.173.23.10, 00:00:07, FastEthemet0/0 208.149.23.96[110/13] via 190.173.23.10, 00:00:16, FastEthemet0/0 

B. 208.149.23.64[110/1] via 190.172.23.10, 00:00:07, Serial1/0 208.149.23.96[110/3] via 190.173.23.10, 00:00:16, FastEthemet0/0 

C. 208.149.23.64[110/13] via 190.173.23.10, 00:00:07, Serial1/0 208.149.23.96[110/13] via 190.173.23.10, 00:00:16, Serial1/0 208.149.23.96[110/13] via 190.173.23.10, 00:00:16, FastEthemet0/0 

D. 208.149.23.64[110/3] via 190.172.23.10, 00:00:07, Serial1/0 208.149.23.96[110/3] via 190.173.23.10, 00:00:16, Serial1/0 

Answer:

Explanation: 

Router_E learns two subnets subnets 208.149.23.64 and 208.149.23.96 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 -> 

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 -> 

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 -> they are surely incorrect. 



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