100-105 training materials(61 to 70) for customers: Mar 2017 Edition

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Product Description:
Exam Number/Code: 100-105
Exam name: Cisco Interconnecting Cisco Networking Devices Part 1 (ICND1 v3.0)
n questions with full explanations
Certification: Cisco Certification
Last updated on Global synchronizing

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2017 Mar 100-105 free practice questions

Q61. - (Topic 5) 

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:

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. 


Q62. - (Topic 4) 

What happens when computers on a private network attempt to connect to the Internet through a Cisco router running PAT? 

A. The router uses the same IP address but a different TCP source port number for each connection. 

B. An IP address is assigned based on the priority of the computer requesting the connection. 

C. The router selects an address from a pool of one-to-one address mappings held in the lookup table. 

D. The router assigns a unique IP address from a pool of legally registered addresses for the duration of the connection. 

Answer:

Reference: 

http://www.cisco.com/en/US/docs/security/asa/asa82/configuration/guide/nat_staticpat.html 

Static PAT translations allow a specific UDP or TCP port on a global address to be translated to a specific port on a local address. That is, both the address and the port numbers are translated. 

Static PAT is the same as static NAT, except that it enables you to specify the protocol (TCP or UDP) and port for the real and mapped addresses. Static PAT enables you to identify the same mapped address across many different static statements, provided that the port is different for each statement. You cannot use the same mapped address for multiple static NAT statements. 

Port Address Translation makes the PC connect to the Internet but using different TCP source port. 


Q63. - (Topic 3) 

Which option is a valid IPv6 address? 

A. 2001:0000:130F::099a::12a 

B. 2002:7654:A1AD:61:81AF:CCC1 

C. FEC0:ABCD:WXYZ:0067::2A4 

D. 2004:1:25A4:886F::1 

Answer:

Explanation: 

IPv6 Address Notation IPv6 addresses are denoted by eight groups of hexadecimal quartets separated by colons in between them. Following is an example of a valid IPv6 address: 2001:cdba:0000:0000:0000:0000:3257:9652 Any four-digit group of zeroes within an IPv6 address may be reduced to a single zero or altogether omitted. Therefore, the following IPv6 addresses are similar and equally valid: 2001:cdba:0000:0000:0000:0000:3257:9652 2001:cdba:0:0:0:0:3257:9652 2001:cdba::3257:9652 

Reference: http://www.ipv6.com/articles/general/IPv6-Addressing.htm 


Q64. - (Topic 3) 

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:

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. 


Q65. - (Topic 1) 

Refer to the exhibit. 

The host in Kiev sends a request for an HTML document to the server in Minsk. What will be the source IP address of the packet as it leaves the Kiev router? 

A. 10.1.0.1 

B. 10.1.0.5 

C. 10.1.0.6 

D. 10.1.0.14 

E. 10.1.1.16 

F. 10.1.2.8 

Answer:

Explanation: 

Although the source and destination MAC address will change as a packet traverses a network, the source and destination IP address will not unless network address translation (NAT) is being done, which is not the case here. 


Avant-garde 100-105 exam answers:

Q66. - (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. 


Q67. - (Topic 7) 

Which routing protocol has the smallest default administrative distance? 

A. IBGP 

B. OSPF 

C. IS-IS 

D. EIGRP 

E. RIP 

Answer:

Explanation: http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/15986-admin-distance.html Default Distance Value TableThis table lists the administrative distance default values of the protocols that Cisco supports: 

Route Source Default Distance Values 

Connected interface 0 Static route 1 Enhanced Interior Gateway Routing Protocol (EIGRP) summary route 5 External Border Gateway Protocol (BGP) 20 Internal EIGRP 90 IGRP 100 OSPF 110 Intermediate System-to-Intermediate System (IS-IS) 115 Routing Information Protocol (RIP) 120 Exterior Gateway Protocol (EGP) 140 On Demand Routing (ODR) 160 External EIGRP 170 Internal BGP 200 Unknown* 


Q68. - (Topic 7) 

What is one requirement for interfaces to run IPv6? 

A. An IPv6 address must be configured on the interface. 

B. An IPv4 address must be configured. 

C. Stateless autoconfiguration must be enabled after enabling IPv6 on the interface. 

D. IPv6 must be enabled with the ipv6 enable command in global configuration mode. 

Answer:

Explanation: To use IPv6 on your router, you must, at a minimum, enable the protocol and assign IPv6 addresses to your interfaces. 


Q69. - (Topic 5) 

Refer to the exhibit. 

A problem with network connectivity has been observed. It is suspected that the cable connected to switch port Fa0/9 on Switch1 is disconnected. What would be an effect of this cable being disconnected? 

A. Host B would not be able to access the server in VLAN9 until the cable is reconnected. 

B. Communication between VLAN3 and the other VLANs would be disabled. 

C. The transfer of files from Host B to the server in VLAN9 would be significantly slower. 

D. For less than a minute, Host B would not be able to access the server in VLAN9. Then normal network function would resume. 

Answer:

Explanation: 

Because Switch1 has multiple redundant links in this network, traffic would not work for less than a minute, and then it would get rerouted along the longer path to the host. The 1 minute outage would be the length of time it takes STP to converge. 


Q70. - (Topic 5) 

Why would a network administrator configure port security on a switch? 

A. to prevent unauthorized Telnet access to a switch port 

B. to prevent unauthorized hosts from accessing the LAN 

C. to limit the number of Layer 2 broadcasts on a particular switch port 

D. block unauthorized access to the switch management interfaces 

Answer:

Explanation: 

You can use the port security feature to restrict input to an interface by limiting and identifying MAC addresses of the stations allowed to access the port. When you assign secure MAC addresses to a secure port, the port does not forward packets with source addresses outside the group of defined addresses. If you limit the number of secure MAC addresses to one and assign a single secure MAC address, the workstation attached to that port is assured the full bandwidth of the port. If a port is configured as a secure port and the maximum number of secure MAC addresses is reached, when the MAC address of a station attempting to access the port is different from any of the identified secure MAC addresses, a security violation occurs. Also, if a station with a secure MAC address configured or learned on one secure port attempts to access another secure port, a violation is flagged.